• EME  OK2AQ

    JN89eu                                 mirek@kasals.com

        10 GHz
     


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    ARI EME Trophy Spring 10 GHz, April 26 - 27, 2025

    Nice spring weather on the weekend 26-27 April, when ARI EME Trophy spring part of the contest was held, promised good participation, which was also confirmed. Both monthly windows were during daylight hours, with no need for overnight stays. However, this resulted in little separation between the Sun and Moon, especially on Sunday. On the lower bands, this certainly bothered, especially stations with smaller antennas. On Sunday the separation was between 5 and 10 deg. The beam width of my 1.8 m antenna at 10 GHz is 1.1 deg, so the separation was sufficient. The multipliers in this contest are Italian stations, so it was a surprise that only IW2FZR appeared on CW on Saturday (he was working remote and digi could not work in this mode). On Sunday, however, the situation changed and Q65 worked another four I stations, while IK0HWJ, who was not on the logger, complied and after a request on a digi contact, switched to CW, where we also made a brilliant QSO. A number of new tags have appeared and the trend of small stations with 1 - 1,2 m antennas and 10 - 20 W power mostly with hand routing continues. It then depends on the skill of the operator and mainly on the “real parameters” of such a station whether the contact will succeed. The day after the contest I made a QSO with SO5AZ {#165} with 1,2 m offset and 10 W, Q65-120E mode and the next day with PA0JOZ {#166} with 1,2 m and 15 W, standard Q65-60D mode. In the contest I made a total of 5 CW and 29 Q65, for a total of 34 QSOs. With initials OE9ERC, SQ9ATC, DL6SH, N1AV, OH3LWP, N6RMJ, NN3Y. CW initials are DL6SH and ON5TA (#40).

     
    10 GHz SKY Scan April 25, 2025
    (with thanks to the programme SkyScanner by OZ9AAR)
    10GHzSky
     
    ARI EME Trophy Autumn 10 GHz, September 28 - 29, 2024 

    One week after the ARRL contest the ARI Autumn EME contest took place. The weather was good, no rain and the moon with only slightly less declination than the week before. However, both lunar windows were characterized by large spreads mostly around 200 Hz. Only just after moonrise and before moonset did the spread drop to 100 Hz. These are very difficult conditions for CW.  So while contest conditions favored CW contacts, there were few. In total I made 24 QSOs of which two were CW - OK1KIR and OZ1LPR. Log

     
    ARRL 2,3 GHz and up II. leg _10 GHz, September 21 - 22, 2024

    2nd leg of the ARRL EME contest in the 3 cm band was held in good weather with good participation. New stations with small antennas of about 1 m and 20 W power are appearing all the time. If they have good tracking, LNA with waveguide relay and a good feed, a Q65 technique can be used to make contacts. I have made 22 QSOs with initials W2HRO, GI7UGV, IZ0JNY, DG5CST and JA8ERE crossband {#157}. In total I have 50 contest QSOs in both legs. Log

     
    ARRL 2,3 GHz and up I. leg _10 GHz, August 24 - 25, 2024

    It seems that the last minute rule change did not affect the 3 cm contest too much. The vast majority of the contacts were Q65 and its standard form in which both the 4-digit locator and report are exchanged is non-conflicting. However, it may be that this fact will lead to a completely unnecessary suppression of CW. In the contest I made 28 QSOs with two initials WA3GFZ and KM0T. In the next few days, two more PE1MMP and PA1OKZ {#152}: log

    Unfortunately, it turned out that a chipper "operator" had set up a remote WLAN on channel 2a in my vicinity (about 6 km). As a result, I can't work with elevation below 17 deg in that direction. The connection with VE6TA started promisingly but could not be completed due to interference. These metropolitan WLANs on free, meaning uncoordinated, frequencies are technical stupidity and anyone can say what they want, including the Czech Telecommunication Authority.

     
    DUBUS & REF European EME CW/SSB Contest 10 GHz June 9, 2024

    This year's European DUBUS & REF contest was held under new conditions, with 24 GHz on Saturday and 10 GHz on Sunday. As part of the increased pre-contest activity, several new stations appeared on 10 GHz and so I added Q65 mode initials: I6YPK, IW2BNA, EA1IW and W4AF {#148}. The spread of signals was large on both orbits, which made it difficult for especially small stations and their CW counterstations to work. In Sunday's contest I worked CW with OK1KIR, OZ1LPR, SP6JLW, PA3ZDL, G4RFR (#38), DB6NT, DL4DTU and HB2M. Outside the contest, I worked the Q65 mode with CT2GUR, VK7ZBX, JA1WQF (crossband), DL4DTU, VE4MA and OK1DFC.

    The sun was shining  SFU = 196,   SN/CS = 13 dB
    SNCS080624
     
    A.R.I. Trophy Spring 2024 10 GHz

    The contest was held in beautiful "summer" weather, only occasionally with stronger wind. However, as it turned out, the low declination of the Moon caused a very small turnout. Stations were also not attracted by the low signal degradation resulting from the Moon's position in perigee. Among non-European stations defended colours  of SA CX2SC and NA K5DOG only. The 3 cm band was dominated as usual by OZ1LPR with power at least 10 dB higher than the other stations. In total I made 14 Q65 QSOs and 2 CW QSOs. New station was IU4MES {#144} see log.

     

    A.R.I. Trophy Autumn 2023 10 GHz

    Beautiful Indian summer again with light showers on Friday night. For me optimal Lunar declination and good station activity, again mostly from Europe. This year also very good activity of Italian stations which are multipliers in the score calculation. In total I made 23 contest QSOs, of which 5 QSOs were CW and the rest Q65. After several previous attempts I finally managed QSO with K5DOG #m 143 by mode Q65-120E. You can see on-line log. Total score is 2128 points.

    K5DOGscreen
         MN/CS 01.10. 2023 20:00 UTC
    MN_CS_011023
     
    2023 ARRL EME Contest 2.3 GHz&up II. Weekend
    The contest was again held in very nice weather, just like the whole week before the contest, during which many stations prepared and tested their equipment. I managed to make a QSO with G4HSK #d125 using a 1.2 m dish, 10 W and coaxial link with feed, i.e. standard tropo equipment. I managed to decode it with averaging. Other new stations were ON4CDU #d126, also with a 1.2 m antenna but 25 W and PA3CSG #d127 with a 3 m dish and 20 W. In the contest there was again a good turnout from Europe. Other continents were represented by JA1WQF, VK7ZBX and CX2SC. From the USA came K2YUH and KN0WS #d128. In the 2nd round I made 14 valid QSOs and a number of "doubles". All for both rounds I got 44 contacts and 24 multipliers - score 44 x 100 x 24 = 105,600 points. On-line log is as usual.
    St_stozarSt_leziSt_novy
    Old power grid mast is down.        The new one - much worse for EME.
     
    2023 ARRL EME Contest 2.3 GHz&up I. Weekend

    The 1st weekend of ARRL contest on 3 cm was held in beautiful summer weather on August 12.-13. Participation especially from Europe was very good. I made a total of 33 QSOs, 30 of them valid for the contest and I enjoyed it, even though I don't like these highest orbits. I had some problem with my receiver for 10 450 MHz and therefore missed Mitsuo JA1WQF. After reviewing all the parameter setting, I asked Tonda OK1KIR to whistle on 10450 MHz and he was already there with a very good signal. New initials YO8RHI (#137) {#121}, SA6BUN {#122} and F2CT {#123}, see log. The sun was "shining" (SFU = 150, SN/CS = 12,5 dB, 1,8 m offset dish) see picture.

    SN_CS_120823

     
    OJ0EME Market Reef

    We've been at the cottage since June 10 and in anticipation of the Market Reef expedition I set up the 3 cm equipment and have been QRV since June 11. The expedition caused excellent EME activity so there was always something to do. Right on June 12, I made a QSO with GW3TKH mode Q65-120E {#134} and DXCC 44. I made a QSO with expedition OJ0EME {#135} DXCC 45 on the first day my turn came up, with excellent reports, see log. I was familiar with the expedition's equipment because Norbert DL4DTU tested it with me in May, before leaving for the reef.

     
    DUBUS & REF European EME CW/SSB Contest 10 GHz May 20 - 21, 2023

    The contest was held in nice spring weather with good, mostly European, participation. I "set up" the 3 cm band already on 13 May and I was lucky that the first contact was with CT2GUR mode Q65. Paulo is my {#132}, working with a 2.3 m diameter dish and 15 W, with a good signal. A series of repeat contacts followed, with a good opportunity to try everything out. On 18 May I made PE1CKK as {#133}. I worked CW in contest with OK1KIR, SP6LW, IW2FZR, HB9BHU, UA5Y, HB9BBD, VE4MA (#36), OZ1LPR, DB6NT, PA0BAT, PA3DZL, OH2DG, F2CT and OK1DFC. The eastern parts of the lunar windows were again with considerable spread - up to 200 Hz. Before the moonset, however, the spread of signals decreased sympathetically to a few tens of Hz and this allowed to make my last CW QSO with Ronn SM7FWZ (#37), who has a 4 m antenna but only 10 W of power. In total I made 15 QSOs in the DUBUS contest. Among CW contacts there were also a number of nice and technically interesting digi QSOs, e.g. with CX2SC (1.8 m & 10 W) and G0OLX (1.2 m offset & 15 W). The only critical comment I would have about some extra strong CW stations is that they should also have a corresponding receiver. It was also interesting that on 20. 5. the solar flux jumped to 170 SFU and this was also reflected by a few tenths of dB on my SN/CS measurement, up to 13 dB, see picture. This time it was great fun around all the stands. Log.

     200523a

     
    2023 A.R.I. EME TROPHY Spring

    Cold weather with occasional rain, snow showers in the morning and high declination of the Moon, that's how the conditions of the contest in my rural QTH could be characterized. In the 3 cm band, the activity was quite decent, but stations from the USA and Japan were missing. In preparation I did a QSO to Tasmania on Wednesday with VK7ZBX and two crossband CW QSOs with JA4BLC {#129} and JA1WQF on Thursday. In the contest I made 21 QSOs of which 6 were CW, the other connections were Q65-60D/E. The new initials were DK4RC {#130} and SM4DHN {#131}. With a very large spread, it is advantageous to use the Q65-60E, which was confirmed when connecting with John G4BAO. I have a good overall impression of the contest. It's a pity that the QSO with GI7UGV was not successful, but there must be a physical limit somewhere and at least I have something to look forward to next time. You can see the log.

    Shack
     

    2022 A.R.I. EME TROPHY Autumn

    It's been a week since the ARRL EME MW contest with much better weather, at least here. But some Italian stations complained a lot about the rain. The participation was significantly better than in the spring part. I made a total of 20 contest QSOs of which 3 were CW and the rest Q65. A pleasant surprise was Rudi OE5VRL {#128} who worked with horizontal polarization. Even so, I decoded his signals and after changing the polarization on my side he had a perfect signal and we exchanged reports (13DB/10DB). Charlie DL3WDG and I successfully tried the Q65-30D mode, which in my opinion would be suitable for contest in cases of stronger signals, because it is 2x faster and, thanks to the larger bandwidth, also more suitable for a large "spread". The log  is as usual.
     
    2022 ARRL EME Contest 2.3 GHz&up II. Weekend

    The second part of the MW ARRL EME contest was marked by very bad weather for me. Unusually low temperatures for this time were accompanied by rain with occasional breaks, see photo. Sun noise was up to 2 dB lower compared to clear weather values at comparable solar flux. The participation of stations on the 3 cm band was good, but most had already participated in the 1st part and so we made a number of "dupe" QSOs. The new stations were HB9Q (14DB/13DB) and UR3VKC (16DB/13DB) {#127}. A pleasant surprise would be Richard VK7ZBX from Tasmania (21DB/17DB) who allowed us to do WAC during one contest. CW activity was as low as in Part 1 - only Dominique HB9BBD added to me. In total, I made 38 valid QSOs with 25 multipliers in both MW weekends on the 10 GHz band, which represents 95,000 points. The complete log can be viewed.

    Dish_rain

     

    2022 ARRL EME Contest 2.3 GHz&up I. Weekend

    This year, the ARRL decided to comply with the wishes of the participants and also dedicate two contest weekends to the MW bands. The 1st weekend just took place on the August 27th-28th and the participation was, at least in the 3 cm band, very decent. Around forty stations from five continents participated (only Australia was missing this time). I have been active since August 18th and immediately made two new initials DL7NN {#120}, LZ4OC {#121} and DXCC 41. On August 20th another ON5TA {#122} and DXCC 42 succeeded. I had a total of 17 QSOs in preparation. In own contest on Saturday and Sunday I made a total of 34 QSOs with 23 multipliers. Worked with new initials UR3VKE {#123}, OH1LRY {#124}, BD4SY {#125} DXCC 43 and G0OLX {#126}. In general, Q65-60D traffic prevailed, as CW was relatively difficult with a large spread. I only worked CW with DL0EF and DB6NT. Several QSOs were made under truly boundary conditions. Apart from the mentioned G0OLX, when we made the connection only after switching to Q65-60E, there were QSOs on Saturday with K2UYH and on Sunday with VE6TA, during which I already had the Moon between the trees on the opposite side, just before moonset. The joy was all the greater that it was successful. The complete log can be found at log.

     
    New tool - SDR Console v3.2 mode continuum

    SDR Console v3.2 was enriched with a very nice tool - the continuum mode, which we know from the SpectraVue program. Since I use SDR Console as a second receiver also for communication, it is very convenient that I can measure the noise of the Sun and Moon immediately without jumping to another program. Self-measurement is largely adaptable and convenient.

                                   SN/CS         SFU = 100                                       

    SN/CS_a

                                   MN/CS

    MN/CS_a
     
    WSJT-X Echo mode improvement

    WSJT-X v2.6.0 has greatly improved self-echo measurement. The measured SNR values correspond to signals in communication modes and also to calculations, e.g. by the VK3UM calculator, even in the case of a very high spread. This is due to the fact that the authors of the program managed to set the integration of the signal according to its instantaneous width.

    Graph
    Echo
     
    DUBUS & REF EME Contest 2022, May 28/29, 2022

    I arrived at EME QTH a week before the contest. The weather was nice from the beginning of the week, only with sporadic showers. But then it got very cold and the rains increased. After studying the current lunar constellation, it was clear that conditions would be poor and CW at high spread - for most windows around 200 Hz, would be very difficult, especially with a small system. I devoted myself to a testing a new program for measuring echo, which works even with a large signal spread. Marek OK2DL visited me on Friday and so we spent a pleasant morning with 3 cm EME and a Q65 QSO with Franta OK1CA. On Saturday I made QSO with an expedition to Corsica TK/HB9CRQ (18DB /21DB), like {# 103} and 40 DXCC. I did not take the contest seriously for the above reason and I made 6 CW QSOs in it. Digi operation was more interesting 12 QSO Q65 with new {# 104} DJ7FJ (17DB /14DB). You can see the log  as usual. Conclusion: good fun in bad EME conditions.

     
    Spring A.R.I. EME Trophy 2022 on 10 GHz, April 9/10, 2022

    After last year's poor autumn part of A.R.I. EME contest, I was looking forward to this year's spring round, with the vision of great participation and good conditions, as last year. Unfortunately, the exact opposite was true. Looking at the phase of the Moon last year and this year only confirms what I have been saying for a longer time. If the organizers of EME contests choose the dates with the highest declination of the Moon under the impression that as many stations as possible will reach the Moon, then they are wrong at least on 10 GHz. At present, the high declination is associated with the position of the Moon near apogee and thus with the greatest degradation and on microwaves also with a large "spread" throughout the window. This discourages many small stations and stations in the southern hemisphere are also at a disadvantage. When the weather develops with strong gusts of wind and showers, like last weekend, it cannot turn out well. Stations with larger antennas decided to keep them parked. The result is, in my case, six Q65 QSOs and two CW QSOs, see log. The weakest result in many years.

     
    ARRL EME Contest 2.3 GHz & Up October 23/24, 2021  

    The microwave "2.3 GHz & Up" event of the American EME contest fell on October 23/24 this year, ie relatively late. The date was certainly chosen in view of the high declination, but as we know, it is associated in the present epoch with the Moon in the apogee. Together with libration resulting in a large "spread", the conditions for the MW EME communication were not ideal. The weather was quite good, without rain, but the strong wind made it difficult, especially for stations with large antennas. I started the preparation my 10 GHz gear on October 20. A higher measured value of SN/CS = 12,7 dB alerted me to a higher SFU = 76,7. By connecting with three Italian stations, I also verified other parts of the EME equipment. Due to my maximum elevation limit of 50o, I started the contest on Saturday morning by connecting with F6BKB (16DB / 11DB) and followed with UA5Y (12DB / 15DB). It was gratifying to see more US stations and also CX2SC (20DB / 15DB), which still works with 10 W. Unfortunately, this time there were no stations from Australia and JA, except perhaps JA1WQF, which I missed. Other initials for me were CW F5JWF (569/559) (# 115) and Q65 G4YTL (22DB / 15DB) (# 116). I made a total of 8 CW QSOs and 18 Q65 QSOs with 18 multipliers in the contest. The final score is then based on 26 x 100 x 18 = 46800 points. The fun was great again. For more details you can see log.

     
    A.R.I. EME TROPHY - AUTUMN 2021, September 25/26
    I built 10 GHz devices in advance and during the tests I did QSO with Q65-60D IK6CAK (16DB/14DB) and PA0PLY (12DB/11DB) {# 97} on Friday. Jan wrote me that this is his first EME QSO in the new QTH. I started the contest on Saturday morning by connecting with UR5LX (15DB/15DB) and followed by stations IK6CAK (16DB/15DB), OK1CA (10DB/9DB) and CW OK1CA (569/559), HB9BBD (569/539), Q65 F6BKB (16DB/14DB), DL4DTU (21DB/12DB) and CW F2CT (O / 569). On Sunday, only PA0PLY (14DB/12DB) and OE4WOG (12DB/12DB) were added with Q65-60D mode. Because there was no one to do on Sunday night, we repeated the QSO with Mauro IK6CAK (17DB/11DB) and tried the CW QSO, but unfortunately it didn't work out. In contrast, the repeated CW connection with Dominique HB9BBD went smoothly with reports (569/529). Next Wednesday 29.9. then we managed a QSO with DF2DG (20DB/9DB) {98}, which we did not succeed in the contest. Overall, it can be said that the autumn part of the ARI Trophy on 3 cm was only a small beer in comparison to the spring part. In addition to significantly less participation, the Moon was in the apogee, and the large spread during both EME windows made it difficult for smaller CW stations, particularly.
     
    Holiday Activity

    From August 9 to 18, I had a 3 cm EME in operation. The moon was very low at this time and therefore activity was low. I made a total of 9 QSOs with six stations IK6CAK (15DB / 12DB), OK1DFC (14DB / 7DB), F6BKB (14DB / 10DB), F5VKQ (13DB / 12DB), OE4WOG (18DB / 15DB) - Wolfgang wanted to try his QRP EME setup 7 W in the feed and 1.8 m dish. However, I was most happy with the CW QSO with Dominique HB9BBD (579 / M) as a new initial. 

    TotalPower  I wanted to check out some new things and mainly solve the problem with the control of the FT991A transceiver in conjunction with the WSJT-X during Q65 operation and Doppler shift compensation. Since using Q65 mode, the control has not worked properly unlike all other WSJT-X modes. In the end, it turned out that the cause was the low speed of the virtual serial port. 

    I verified the method of measuring the noise level using the program "Total Power" from I0NAA with RTL SDR, see the picture. Measurements have been shown to be as accurate as SpectraVue in continuum mode, but RTL SDR allows measurements at higher bandwidth.

    Also DL0SHF has been measured, which worked only with 7 W of power. I believe that this should be the standard beacon mode in the future and the 50 W power should be switched on only on request. With a power of 7 W, the beacon in the Q65-60E mode is very well decodable even with a small antenna (for me -10 dB with a 1.8 m offset).
     
    A.R.I. EME TROPHY - SPRING 2021, April 24/25

    One week after the DUBUS contest at 10 GHz & up, took place  A.R.I. EME - spring part. The weather turned fair a bit, although it was still very cold. The declination was lower and the spread also decreased, although it still reached large values ​​in the highest positions of the Moon. Even in the week between contest, some QSOs were successful, including the init SM7FWZ by mode Q65-60D. I started the contest in the same mode by connecting to VK3NX and we repeated it CW with a small spread as a new CW init. This was followed by the connection of Q65 with ES5PC and with VK7ZBX from Tasmania, which had a 60 cm dish and a power of 30 W. Again, we felt the absence of stations from the US, the exception was briefly WA3RGQ. The new init managed to get more on CW than Q65, for me it was IZ2DJP and SM6PGP. I made a total of 24 QSOs in the ARI contest, of which 10 CW. The result of two weeks of activity in the 3 cm band was 65 connections, some of which were really interesting – log.

    Working with the new Q65 mode in many of its variants also brought lessons and great fun. The DL0SHF beacon works very well and its strong signals reached -4 dB on my end can be captured even with a really small aperture. I enclose a picture of its Q65-60E signal with a small spread.

    DL0SHF_0421
     
    European DUBUS&REF Contest 2021, April 17/18

    Fortunately, I built the antenna on Saturday, a week before the contest, even in good weather. This was followed by a revival of electronics and calibration of antenna tracking. Already on Tuesday there was a drastic change in the weather, see photos below, and such weather with the alternation of snow and rain lasted for the rest of the week and during the contest. However, the date was not chosen happily, especially in terms of the phase of the Moon. The very high declination involved a large spread of signals, which makes it very difficult to receive weak signals in microwaves, especially CW. Only shortly before moonset did fall the spread below 100 Hz in the 10 GHz band. Otherwise, however, there was good activity even before the contest. On Friday I tested the rig by connecting the Q65-60E cross-band with JA1WQF and followed the new init CX2SC. Immediately after that the new init CW HB9BHU and others, see log. In the contest I made 16 QSOs with a score of 16 x 14, with two new inits YO2BCT and F2CT.

    Antenna&Snow
     
    A.R.I. EME Trophy Autumn 2020, September 19/20
    Beautiful late summer was the optimal weather for both consecutive contests. I enjoyed them both, including the week between them, when I did OE4WOG # 100 * and PA0HRK # 101 *. The testing of the new 2.6 m OK1DFC dish on Friday was a diversification. When I received a 7DB report from Zdeněk, I almost fell off my chair and I knew right away that the work had succeeded. There was good participation in the A.R.I. contest, even at the low position of the Moon, and many stations were able to work both CW and QRA. I think that more stations did "everything possible" and so the point differences will not be large. I made 25 QSOs out of which 7 CW. A pleasant surprise for everyone was UA4AAV # 102 * with a good QRA signal. You can see my log.
     
    ARRL EME Contest, September 12/13
    Beautiful weather, even though condensed water flowed from everything early in the morning. For me, the Moon was very high, so I was forced to skip the middle part of both lunar passes. Participation was not bad, but none from Japan, South America, Africa and Oceania. From the USA participated so many stations as from OK. I made a total of 19 valid QSOs, of which 2 QSOs CW, the others QRA64D. The only new initial was the VE6TA from Edmonton, but it was worth it - the signals were on both sides on the edge. The total score is 19 × 100 × 16 = 30,400 points.
     
    Broadband Noise Measurement
    Much has been written about measuring the noise level. When measuring the noise of the Sun and Moon, we like to use SpectraVue from RFSPACE in the Continuum mode. It is a perfect, accurate and, most importantly, fast application that can run on a PC in parallel with other programs for communication and control, if the PC is powerful enough. However, it is difficult to estimate the tenths of the last dB, and these are the ones in the final stage of setting up the EME system. In these cases, I
     returned to the classic measurement using a precision attenuator and logarithmic detector AD8307 (PCB gave me Franta OK1CA some time ago, thanks). At the input is a broadband amplifier with a central frequency of 145 MHz and a bandwidth of 10 MHz and behind the detector a range expander, similar to the well-known VK3NX design. The most important is the precise attenuator.

    Sun Noise Measurement 13.9.2020   1013 UTC   SFU = 64

    a) SpectraVue

    S_V
    b) Attenuator + AD8307
        Range 2 dB: indicator 1,2 dB + attenuator 11 dB = 12,2 dB
    SN
    Moon Noise Measurement 10.9.2020   1210 UTC  
          Range 1 dB: indicator 0,94 dB + attenuator 0 dB = 0,94 dB
      MN
     
    Activity Weekend in July 2020
    We traditionally spend the summer in a cottage, so when G3LTF announced an "Activity Weekend" 3/13 cm on 25/26. 7. 2020, another plan was decided. After standard preparation, I started operation on July 18 by connecting to G4BAO JT4F and IW2FZR QRA64D. In the following days, I made a total of 26 QSOs of JT operations and one CW with DL4DTU (# 22). The new initials were WA2RGQ {# 94}CT1BYM {# 95} DXCC33, ZS1LS {# 96} DXCC34. The start of AW on Saturday was really successful. Roger ZL3RC appeared there, with whom I had tried several times to negotiate sked. It's not easy with my minimum elevation limit of 10o. Roger was 4o at the time. He was out with a tripot so he could go to zero elevation. However, it is winter in ZL - the temperature was 1.5o and the local time was 22:00. However, just after the moonrise, the ZL3RC appeared with a beautiful QRA64D signal with horizontal polarization. The connection went absolutely smoothly (right after OK1KIR) with excellent reports ZL3RC (15DB / 18DB) {# 97} DXCC35. It is, of course, my ODX 18067 km and I am really happy with this QSO. This was followed by a series of mostly repeated QSOs and finally on Sunday DF1SR {# 98}. You can see the online log.
    ZL3RC
    Roger ZL3RC with his 3 cm EME setup and Skoda Yeti car.

    It's been a perfect week. In addition to the QSOs, I did a number of experiments and measurements. With Zdeněk OK1DFC, we did a very interesting QRPP test, when we established a QSO with a Zdenek's power of 1-2 W. We reported on this experiment in detail on the website of the OK VHF Club.
     
    May - June 2020

    Q-Team grid expedition and good EME conditions last veekend in May induced increased EME aktivity. On 28. 5. I worked IW2FZR (15DB/13DB),  29.5. VK7MO (14DB/16dB), OK1KIR (11DB/11DB), JA1WQF (13DB/12DB), F5VKQ (12DB/16DB), UA3TCF (18DB,14DB), 30. 5. HB9CRQ (15DB/19DB) as (#92), PA3DZL (16DB/11DB), S57RA (10DB/15DB) as (#93), PY2BS (10DB/11DB), OK1DFC (11DB/8DB), IW2FZR (16DB/15DB), 31. 5. UN6PD (15DB/13DB), F5VKQ (15DB/17DB), 1. 6. HB9DUK (12DB/19DB), IZ4BFA (22DB/18DB), 2. 6. IW2FZR (16DB/16DB), 3. 6. S57RA (12DB/14DB).

     
    April - May 2020
    European DUBUS and REF EME Contest 10 GHz and up

    Several stations with a small dish ~ 1 m and outputs of about 10 W worked on the band, which was a challenge. I did the QRA64D mode on 28.4. IW2FZR (23DB/15DB) {# 75}, DL6ABC (12DB/17DB), 29.4. HB9DUK (14DB/16DB) {# 76} and JT4F G4BAO (20DB/15DB) {# 77}. 30.4. wkd QRA64D S57NML (14DB/17DB) {# 78}, IW2FZR (20DB/14DB) and IZ4BFA (22DB/18DB) for initial {# 79}. 1.5. I worked JT4F OK1DFC (14DB/14DB) and QRA64D HB9DUK (14DB/16DB). In the contest 2.5. wkd CW OZ1LPR (579/559), OK1DFC (549/539), OK1KIR (559/549), SA6BUN (559/529), HB9Q (559/539) # 16, OH2DG (559/559), LX1DB (559/559) ), PA0BAT (559/549) # 17, W5LUA (O/O) # 18, OK1CA (O/O). 3.5. CW UR5LX (O/O), PA3DZL (549/529), IK0HWJ (559/519) # 19, 9A5AA (O/O) # 20 and SP2HMR (559/O) # 21 with a total score of 15 x 13. Out of contest I worked 2.5. QRA64D with W5LUA (10DB/16DB) and 3.5. OK1CA (13DB/11DB), KN0WS (22DB/23DB) {# 80}, HB9DUK (15DB/18DB), UR5LX (15DB/14DB), I4TTZ (22DB/19DB) {# 81}, IK6CAK (22DB/17DB) { # 82}, UA3TCF (17DB/14DB), IK0HWJ (10DB/14DB) {# 83}, PA0BAT (10DB/10DB)

    One week before the DUBUS Contest 3 cm and up, I installed a long-prepared offset dish with a diameter of 1.8 m. After focusing and positions calibrating, I measured SN / CS = 12 dB at SFU = 69 and MN = 1 dB, which correspond to calculations.

    1,8m setup

             SN/CS 090520  13:29 UTC SFU = 69                        MN/CS   030520

    090520030520

     

    October 2019
    A21EME

    A successful EME expedition is always a good opportunity to participate. Since the microwave part of the A21EME began on Monday and every day on a higher band, 3 cm was scheduled for Friday, 25 October. I was QRV already on Thursday afternoon and managed the necessary calibration in the Sun. I came to my workplace on Friday at 4:30 am our time. The weather was beautiful, though cold but completely clear sky, calm, Moon only a little boy in the south-east. But what was my surprise when I went out after half an hour to compensate for the spatial offset to Botswana. Fog that could not be seen at ten meters and everything flowed water. A21EME was already doing big guns and after VK7ZBX with 75 cm dish. I did it right after him A21EME (18DB / 21DB) as initial # 83. Because I had Richard's “backlog” I just looked at him and this time we made VK7ZBX (21DB / 22DB) # 84 without a problem.

    The rest of the month's pass was also very nice, as there were many active stations on the band, see the log. WAC was not with me, but even five continents in one pass are worth it. And we could still romp on Saturday.

    chaticka v mlze
     
    September 2019
    A.R.I. EME Trophy Autumn
    Compared to the previous weekend, the Moon's declination was significantly lower and the Moon was in perigee. Smaller spread and very little degradation meant really good conditions. I had a sked with the ZL3RC with a 10-minute window on Saturday morning, but Roger canceled it because in 50 km/h of wind he didn't have the courage to build a 4 ft dish on the tripod. On Wednesday 25th September I tried to connect with VK7ZBX with 60 cm dish. I took it without problems throughout the window but he decoded me only once, so the connection wasn't complete, but he made a movie about our activity:
    https://www.youtube.com/watch?v=0zTtAq6lk0c&feature=youtu.be

    Richard sent me the wav files from our connection and when I played with them I decoded it five times, so the connection was theoretically possible. On Thursday, we "chased" EA8DBM with Zdenek, but Alex hit the Moon only for two periods with a strong echo, but he failed to repeat. The situation was repeated on Friday with OK1KIR.

    The contest itself started with JT65C mode with OK1KIR (10DB / 13DB) and immediately followed a beautiful crossband QSO with JA1WQF (14DB / 13DB). Mitsuo sent me his screen as I played there:

    OK2AQ_JA1WQF

    Other managed QSOs, according to mode: QRA64D with UN6PD (19DB / 17DB), UR5LX (17DB / 15DB), SM6CKU (17DB / 16DB), UA3TCF (# 75) (17DB / 18DB) and DL6ABC (15DB / 20DB). JT4F mode: F5VKQ (13DB / 13DB), W3SZ (16DB / 15DB), F6BKB (# 76), DL4DTU (# 80) (15DB / 19DB), G3RFR (15DB / 17DB) and M0EYT (# 81) (15DB/17DB). Also CW succeeded: IW2FZR (# 74) (O / O), OH2DG    (# 77) (O / O), OK1KIR (O / O), G4NNS (# 78) (O / O), DB6NT (# 79) ) (O / O) and LX1DB (559/559). Total 19 QSO.

     
    ARRL MW EME contest

    I completed the microwave part of the ARRL EME contest at 10 GHz as usual from my cottage in the JN89eu square. Although I managed to complete the mechanics for an offset mirror with an aperture of 1.8 m, I did not find two “strong assistants" to help me put on the mirror. So we put the proven 1.2 m offset on the mast with my wife as usual. Calibration on Friday was OK at SFU = 60 and SN / CS = 9.5 dB, MN / CS = 0.6 dB. I have a new LO synthesis in the transverter so I wanted to test it in operation. Before the contest we managed to test QSO with Zdenek OK1DFC. The contest itself started somewhat awkwardly, so after joining the OZ1LPR, I lay down for a while also because the moon was soon too high and I am limited by a maximum elevation of 50o. It was in connection with the high declination of the Moon that there was a large spread (mostly> 100 Hz) on both days, only before the moonset the signals narrowed. I made new initials RA3EME and W3SZ and JT4F DL0EF. Overall I made 11 QSOs QRA64D, 1 QSO JT4F and 2 CW.

     
    August 2019
    MW Activity weekend

    MW activity weekend fell on 24.8. - 3 cm and 25.8. - 6 cm. However, participation was very low. Even some other active stations were only on the logger. This corresponds to my result, although I replaced the original tripod by mast, which had me made Zdeněk OK1DFC (tnx). I worked with OH2DG (-14 / -14), OK1KIR (-13 / -17) and F5VKQ (-19 / -19) {# 69} QRA64D mode and on Sunday CW SP6JLW (RO / O) . All the more time was for experiments to measure the frequency accuracy, SN / CS, MN / CS, and own echo. After QSO with OK1KIR, Vlada OK1DAK and me stated that our frequency does not differ by more than 15 Hz in absolute terms, including the Doppler offset compensation of ~ -11 kHz and the signal’s spread by the Moon's librations 115 Hz (on 10368,200 MHz), see Figure:

    stozarekOK1KIRqso

    It was also interesting to measure own echo. For most of the time in both lunar windows, the spread was large, around 100 Hz or more. My own echo was hardly perceptible:

    echo240819

    However, on Sunday before sunset, the spread fell below 10 Hz for a short time and the echo was excellent. This is the time when is possible to work also CW with small antennas (if they were any stations on the second end).

    echo250819graf250819
    May 2019
    DUBUS and ARI contests; SV9/HB9CRQ expedition
    Of course, taking part in a CW / SSB contest with a 1.2 m dish is a boldness but also a challenge. Fortunately, in addition to the DUBUS contest, the ARI EME contest took place same weekend in which the digi QSOs are also evaluated. Mainly it was a period of increased activity in the 3 cm band, when it was worth to be QRV. After the 1.2 m offset dish antenna was built and the radio and computers were put into operation, on Friday, I calibrated antenna and measured SN / CS = 9.8 dB and MN / CS = 0.6 dB. Followed by the measurement of own echo with a small spread:
    Echo100519
    In the contests I made 7 CW QSOs with SP6JLW (O/O), OZ1LPR (559/529), SA6BUN (#) (O/O), DL0EF (559/539), OK1CA (O/O), UR5LX (O/O), F1PYR (O/519) and 5 QRA64D QSOs with DC7KY (11DB/11DB), DL7YC (17DB/16DB), OK1CA (14DB/15DB), EA3HMJ (21dB/18DB), UR5LX (16DB/15DB). Although I have a solid power (42 W), I still hear better than I call. I called crossband JA8ERE and some other stations but no success. The score for DUBUS contest is 7x100x7=4900 points and for ARI Trophy Spring 7x4+5x1=33 points.
    SV9/HB9CRQ
    On the following Wednesday, there was a heavy rain all day. We waited for SV9/HB9CRQ {#} expedition on 10 GHz. Fortunately, the QSO between the two small antennas went smoothly (20 DB/20 DB) and moreover, thanks to the activity that the expedition triggered, three more initials OH2DG {#} (15DB/16DB), G4RFR {#} (18DB/15DB) and JT4F PA7JB {#} (18DB/15DB) succeeded.

     

    SV9/HB9CRQ with 1,5 m dish


      
     
    Echo1 Chat_HB0
    Echo011218_1Echo011218_2
     Echo 30.11. 2018 at 09:03  low spread     Echo 1.12. 2018 at 06:00 spread 148 Hz
    HB0
     
    September 2018

    4U1ITU and ARRL EME contest 2018

    Last EME week was successful. The centerpiece was Zdeněk's OK1DFC expedition to 4U1ITU where, with the help of Attila OM1AM and Braňo OM3YFT, he worked on seven bands from 432 MHz to 24 GHz. Although the conditions there were very tough, caused by city disturbance, defective ground on the roof and the weather, they did it perfectly and at the level of possible. Zdeněk really deserves admiration. Even only in terms of physical and mental effort. To operate a series of consecutive nights with an expedition style (one EME connection after another), solve the above-mentioned problems and during the day to swap and test new bands in two dishes .... hats off.

    The equipment for 3 cm band, I had built on Tuesday and at first I performed the usual SN / CS, MN / CS, GN / CS tests, frequency control by listening a reflection of the OK0EA beacon and finally measuring own echo. I discovered a mistake in the company documentation for a small 1.2m offset dish, which I use so far, and which has not been sleeping me for a long time - American colleagues mistakenly counted inches to millimeters, hi.
     
    While Zdeněk announced that he will be 27th September on 3cm, we made QSO with Franta OK1CA QRA64D mode (-15DB / -15DB) as a test. Because it was time, I still did  the OZ7Z # 59 (-16DB / -16DB)  followed  by 4U1ITU as # 60 and  the new DXCC (-16DB / -15DB). 28. 9. before start of the contest Charlie called me G3WDG (-12DB / -14DB) and Nikolai UN6PD (-21DB / -18DB).

    In the ARRL EME contest I made 15 QSO QRA64D with stations: UR5LX (-19DB/-16DB), OZ1LPR (-10DB/-16DB), OZ1FF(-15DB/-15DB), W5LUA(-11DB/-18DB), HB9Q(-12DB/-15DB), K6QPV (-16DB/-18DB), VK7MO (-16DB/-20DB) # 61, DC7KY (-14DB/-16DB) # 62,  DL6ABC (-13DB/-20DB),   G3WDG  (-12DB/-12DB),   OZ9DT  (-20DB/-19DB),  DL7YC  (-15DB/-15DB),  VE4MA (-16DB/-15DB), N9JIM (-10DB/-19DB) and EA3HMJ (-17DB/-17DB) and 1 QSO CW DL0EF (559.0). Total 1600 x 10 = 16,000 points.

    June 2018

    I built a 3 cm EME system on Saturday June 9 and calibrated it on the Sun. On Sunday morning at 02:23 I made VK7MO (-17 / -21) from QG37te as {# 45} and on Monday from QG38kl (-16 / -19) {# 46} followed by VK3NX (-15 / -16). In the next days, I worked always in the mornings, along with others, VK7MO from the squares QG39dw, QH30fa, QH31ar, QH32qh and QH23ua {# 47-51}. Rex's expedition to Qeensland is fascinating again. With daily regularity, the window opens to the US and the EU from a new field. The conditions vary according to where he can find the site, see photo. Rex is 76 and for EME (but also terrestrial) digital communication is a real expert. It is therefore a pleasure to make QSOs with him. From the EU, he is working with us on a regular basis 5-6, he has given us ringing tones and even without the HB9Q logger he can organize us and gradually the Moon will make us.
    RexJune2018 
    On Saturday and Sunday, DUBUS held a 3 cm contest. I worked CW with SP6JLW (O / O), OK1KIR (O / O), OK1CA (O / 549), OZ1LPR (579/529) and DL7YC (O / O) {# 52}. Outside the  contest QRA64D  with  K6QPV (-14 / -16) {# 53}. The following week Rex continued north into squares QH24fk, OH16ob, OH17hu and great expedition ended in most northerly australian grid QH19 (QH19ec). All QSOs were successful with him {#54-57}. Thank you very much, Rex. I also finally worked on 22 June at 15:12 using QRA64D UN6PD as {#58} and DXCC 23 (-18 /-17) and ended using JT4F in a test QSO with G3WDG.
    In addition, I have been working on parameter measurement. I was pleasantly surprised to measure my own echo with the latest version of WSJTX. Echo shows the exact compensation of Doppler shift CFOM (with step 2 Hz) at low width 13 Hz and 21 accumulations. Used offset dish 1.2 m; 42 W; 0.8 dB N.F. 
    OwnEcho

    May 2018
    In the third week of May I planned a 3 cm EME activity. On the one hand, the expedition of the Q-team in the Balearic Islands - EA6 started and also A.R.I. contest promised more activity at the end of the week. The EME conditions should also be very good. After many weeks of drought, however, it began to rain from Wednesday two days so I could only begin to build a dish until Thursday afternoon. On Friday, I tested the EME setup with a perfect qso with Charlie HA / G3WDG, which also has a 1.2 m aperture and 50 W power (-18 / -19).  There followed a connection with Al W5LUA (-12 / -16).   I made a new {# 36} DL6ABC (-13 / -21) and  HA / G3WDG (-18 / -19) again on Saturday at MR. On Sunday was the first {# 37} OK1DFC (-17 / -16). We have been doing several times with Zdeněk, but it has always been somewhere in the world. There was a test qso with Franta OK1CA (-15 / -15). EA6 / HB9COG (-17 / -18), followed by EA3HMJ (-14 / -17), random OK1DFC (-18 / -19) and UR5LX (-16 / -16). The evening ended with a nice connection with Al K2YUH (-18 /-17) {# 39}.
    October 2017
    I followed Zdenek‘s (OK1DFC) dxpedition trip to Morocco, and very much appreciated how he solved his very knotty problem of providing microwave operation from Africa. I was able to QSO on 6 Oct using JT65B on 432 EA9LZ (O/O) for digital initial {#29}, and on 8 Oct using QRA64D on 10 GHz EA9LZ (20DB/21DB) for digital {#33} and WAC on 3 cm! I also QSO’d using QRQA64D on 10 GHz, on 8 Oct DF1OI (13DB/15DB) {#34}, and on 9 Oct G4CBW (19DB/20DB). I QSO’d on 3 cm using QRA64D on 19 Oct [HB9Q’s Africa dxpedition] 3DA0MB (19DB/20DB) {#35}, G4KGC (11DB/14DB), OZ1LPR (11DB/20DB) and DF1OI (13DB/16DB).

    3DA0MB

    September 2017

    End of the holiday season I spent at our country house on 3 cm EME -- I worked VK7MO from QF78xc for digital initial {#30}. In the ARRL MW Contest, I QSO’d OK1KIR (14DB/16DB), OZ1LPR (8DB/18dB), WA3LBI from DE, FM28lo, (15DB/18DB) {#31}, G3WDG (11DB/14DB), UR5LX (18DB/14DB), OK1CA (17DB/17DB), SP3XBO (18DB/13DB) {#32}, N4EME (16DB/18DB), VE4MA (17DB/15DB), N9JIM (17DB/18DB) and HB9Q (12DB/15DB). Besides these digital QSOs made using QRA64 or JT4F, I worked also OK1CA (O/O) and OK1KIR (O/O) on CW. My total score is 11x9 or 9900 points.

    July - August 2017

    This summer I started operation on 3 cm EME on 29 July – I QSO’d G3WDG (15DB/11DB) using WSJT-X QRA64D and CFOM Doppler compensation, followed by a QSO with W3LBI QRA54D (17DB/17DB), and on 30 July OK1KIR QRA64D (13DB/13DB) and JT4F (16DB/16DB). I worked on 3 Aug G3WDG QRA64D (15DB/16DB), and on 8 Aug joined VK7MO’s VK grid dxpedition. The conditions were far from optimal – degradation 2 dB and spread around 150 Hz, but I QSO’d VK7MO (23DB/23DB) for my digital initial {#19} in PH44 using QRA64D and CFOM, and continued QSOs using QRA64D unless noted otherwise on 9 Aug VK7MO (22DB/24DB) in PH43cq {#20}, on 11 Aug VK7MO (24DB/22DB) in PH31us {#21}, on 14 Aug VK7MO (22DB/23DB) in PH11gx {#22} and HA/G3WDG (18DB/19DB) with 1.2 m dish and 50 W, on 15 Aug VK7MO (21DB/23DB) in PH12ga {#23}, on 18 Aug VK7MO (22DB/24DB) in PG09ax {#24}, PA3DZL using JT4F (18DB/13DB), on 19 Aug JA1WQF JT4F (17DB/17dB) {#25} and SP/OK5EME (19DB/24DB) {#26}, G3WDG (10DB/19DB), again SP/OK5EME (18DB/16DB) with minimal spread around 10 Hz, and finally PY2BS using JT4F (18DB/18DB) {#27}. My new station setup is a 1.2 m offset dish, 0.8 dB N.F. and a 42 W GaN SSPA.

    June, 24. - 25. 2017  - new setup
    feed offset dish
       
    3 cm AW in July 2016
    The last EME activity weekend as well as the whole previous week were accompanied by varying weather with strong storms and rain. Thus, our EME activity was affected too. During this week I had worked eight QSOs by JT4F and one QSO CW. Worth mentioning is a QSO with G3WDG where we tested his new portable setup with 4ft dish. Mode was JT4F, Doppler compensation method CFOM and exchanging reports -11/-21 dB. Charlie used 100 W PA in the feed point with two TGA2312 GaN modules. During the weekend I had worked JT4F OZ1LPR, WA3LBI, OK1KIR, G3WDG, HB9Q and CW OK1KIR.

                                                   MyEcho250716
                                                  Echo on July 25 at 06:45 UTC
    MW EME OK2AQ
     
    May 2016
    setup_May2016
    I was looking forward the week around DUBUS EME 3 cm and up contest as high activity was expected and therefore an opportunity to experiment. The conditions for EME on microwaves were also excellent. I had few things to test - a new, more robust tripod with dish mounted higher above the ground. However primarily I needed to try out the new system of Doppler shift compensation in reality, see article DUBUS no.1/2016. With my QRP setup – 1.8 m dish and power around 20 W – it is very hard to take part in the CW contest but for enjoyment and a lesson-to-learn it is good enough. We succeeded to repeat QSO with VK7MO who has 77 cm dish and 50 W, this time in JT65c mode. Signal width was 3 Hz only and we used no averaging, see Rex’s and my screens below.  QSO JT65c with G3WDG followed. There was a bigger spread among EU stations but sigs were stronger. Next day when the minimal signal width was 20 Hz a QSO with VK7MO JT65c could not be established anymore. Total number of QSOs was 12 with two initials EA3HMJ and PA3DZL (JT4f). Two QSOs were managed with OK stations – CW OK1KIR and JT4f OK1CA.
    VK7MO080516
    VK7MO_OK2AQ
    VK7MO_screen

    September
      2015

    MW ARRL EME Contest is a good opportunity for EME experiments because activity on microwaves is higher. I wanted to test a new system for Doppler shift compensation. On 3 cm band at very weak signals which are not only below hearing levels but also very difficult to notice on the waterfall immediately, it is a fundamental thing. Next needed merit is an ability to operate on a precise frequency in order of tens Hz. For that reason I have built a transverter 148/18 MHz with DDS synchronized by rubidium frequency standard as well as microwave transverter. Control program allows to compensate Doppler shift for Rx as well as Tx in all cases which can occur.

     
    GUI_Dopp

    On August 30. I worked OZ1LPR (14DB/20DB), 3.9. wkd WA3LBI {#12} (15DB/15DB) and OK1KIR (13DB/13DB). 4.9. wkd HB9Q {#13} (12DB/13DB) and in the contest 5.9. OK1KIR (13DB/17DB). 6.9. wkd OK1CA (13DB/18DB), HB9Q (13DB/11DB) and OZ1LPR (14DB/15DB). Finaly 8.9. wkd OZ1FF {#14} (14DB/14DB). Mode of all QSOs was JT4F.

    May 12 - 19, 2015

    Several days around ‘Dubus Contest 10 GHz and up’ I turned to EME experiments, too. My small setup 1.8 m dish and 20 W power in the feed is not suitable for contesting but number of station welcomed an opportunity to test their equipment. Beside that we tested new software WSJT-X included JT4 modes. On May 13, I worked G3WDG as first WSJT-X  qso (10DB/16DB). Next day wkd W5LUA {#9} first with WSJT10 (13DB/14DB) and then WSJT-X (7DB/12DB). We are able to see much better measured signal levels by WSJT-X. On Friday wkd CW OZ1LPR #4 (569/O) next OK1CA and OK1KIR both JT4F (12DB/14DB). On Saturday early morning attempted with VK7MO WSJT-X ended with several sync relations but decoded only by post-processing. In the contest I made three CW QSOs with OK1CA #5 (O/O), OK1KIR (O/O) and F1PYR #6 (O/M). Except the contest wkd JT4F UA4HTS and VE4MA {#8} both (13DB/14DB). After the contest wkd interesting QSO CW/JT4F with PA0BAT {#9} (O/O) and JT4F ES5PC {#10} (O/O). Last day May 19, wkd JT4F OZ1LPR {#11} (12DB/20DB). 

    October 3 - 4, 2014
    October 4, worked UA4HTS (JT4F -14/-12 dB)
    October 3, worked G3WDG (JT4F -12/-13 dB)
     
    VK7MO - OK2AQ       A successful QSO between two small stations
     
    On Friday October 3, a QRP,  JT4f, QSO was completed between Rex, VK7MO operating portable from Mt Wellington in Tasmania, QE37oc  and Mirek OK2AQ in the Czech Republic, JN89eu. VK7MO used his standard portable equipment consisting of a 77 cm dish and 50 W. OK2AQ used  a 180 cm dish and 20W.  Rex automatically compensated Doppler shift for both sides using the VK1XX program. We used horizontal polarization with spatial offset about 17 deg that was compensated by OK2AQ. Exchanged  reports were -19 dB/-20 dB. Averaging was required at the VK7MO end due to the lower TX power at OK2AQ. The timing of the sked was chosen for extremely good conditions: spreading 15 Hz and degradation 0.5 dB. I was the smallest station Rex has worked to date and vice versa. 
    VK7MO_1OK2AQ_1

    Excellent EME condition: spread 15 Hz and deg. 0,5 dB resulted gain about 5 dB as compared with September 19. The 1270 Hz tone from VK7MO shows difference:
    VK7MO1508
     
    There are VK7MO JT4F sigs (never seen so narrow lines on 10 GHz EME):
    VK7MO JT4F

    full report about VK7MO-OK2AQ QSO
     
    September 17 - 20, 2014

    September 20, measured SN/CS = 9,5 dB (SFU = 109) and MN/CS = 0,6 dB

    September 19, worked OK1CA (JT4F -15/-15 dB) and  (G3WDG (JT4F -12/-16 dB)

                    OK1CA signals                                 G3WDG signals
              Ok1CA_G3WDG

    Test with VK7MO (77 cm dish and 50 W) in QF04xc. At both sides were indicated
    1270 tones:
                                      VK7MO
    but messages were not decoded at these poor conditions (spread 150 Hz,
    deg. 2,2 dB).

    September 18, worked UA4HTS (JT4F -15/-15 dB)

    July 14 - 26, 2014

    July 25, worked random OK1KIR (JT4F -12/-15 dB)

    VK3NX_qso

    July 21, 2nd QSO with VK3NX

    VK3NX JT4F signals

    VK3NX_JT4F

     

    July 20, worked VK3NX (JT4F -14/-14 dB), OK1KIR (CW 569/O),

                                OK1KIR (JT4F -13/-13 dB), LX1DB (CW 559/O)

     

    July 14, MN/CS ratio:

    MN_CS



    SN/CS ratio, SFU = 112
    SN_CS

     

    Own Echo:  Az/El = 127/16, Dopp. = 13613 Hz (compensated), Lib. = 38 Hz, Degr. = 0.13 dB

    Echo140714

     

    May 24, 2014    DL0SHF 10 GHz  EME Beacon

    DL0SHF_240514

    Speaker copy: DL0SHF_250514.wav

    The WSJT level should be likely better than -10 dB(?)

    DL0SHF

    OK1KIR JT4F precise -12 dB

    OK1KIR_JT4F

    No answer from my side due to Tx failure.
    DL0SHF and OK1KIR signals with Doppler shift compensation:
    JT4F_JT4G

    Between September 26 and 29 I was attempting my first 3 cm EME from our country house QTH in JN89EU. My overall setup is on a smaller side ­ dish 1.8m, 20W. In the p receding two days while experiencing bad weather I was busy measuring SN, MN and C/G ratio. On September 27 we had a sked with Franta OK1CA. We were able to hear each other but failed to manage a QSO. During the ARRL EME Microwave contest I was able to steadily hear sever big CW stations: DL0EF, DL0SHF, OK1KIR, LX1DB and fragments of few others.  On September 28 I was trying to call strong stations many times without success,  just "QRZ?" from a few. Many attempts later I finally received a reply from DL0EF with my call sign at Moon elevation 15 deg when spread was already a bit lower - about 100 Hz. The next day, we managed another sked together with Tonda OK1DAI, a member of OK1KIR team. Tonda suggested JT4F mode for QSO and after several minutes the QSO was carried out with mutual reports "O". I was very pleased, of course. Big "Thank you" to Tonda!