If you work via #GreenCube, try #EME with big guns. I promise, you will be amazed! As a proof of concept, I made a quick #moonbounce QSO with DL7APV with just a Yaesu FT-818, 40W, 1dB NF LNA and 15 el Diamond antenna held by hand! Easy QSO. Read on🧡
#amsat #io117 #hamradio #hamr Diamond A430S15 Yagi antennaEME QSO with DL7APV using 40W, Yaesu FT-818 and 15 el Yagi
2/9 There are a number of extremely capable #EME stations on 70cm: DL7APV, HB9Q, NC1I. If you are enjoying decode rates above 80% on #GreenCube, don't wait and try #EME. You will likely complete your first QSO over the Moon faster than on the congested #IO117
#amsat #hamradio Credit: HB9QCredit: DL7APVCredit: NC1I
3/9 I used my portable #Greencube set: Yaesu FT-818ND - 40W amp / 1dB NF preamp - Diamond A430S15 14.8dBi on wooden extension, held by hand and pointed visually. With a low NF frontend you can go with a 7el Arrow
#EME #amsat #hamradio #hamr #moonbounce
4/9 Don't see the Moon? Use ISS Detector, which you likely employ in your portable operations. Make sure that the pointing accuracy stays within 5 degrees. The beam width of a small #Yagi is large but every dB is a fortune when the path loss is 250dB #moonbounce #amsat #hamradio
5/9 Be prepared that the Faraday rotation will try to spoil your #EME fun. This is not an issue if you can twist your boom by 90 degrees. Discuss with your sked whether you start with Hpol and Vpol
#moonbounce #amsat #hamradio
6/9 Familiarise yourself with #EME function of WSJT-X. You will likely need to use Q65-60B. Discover "Astronomical Data" tab. And don't forget to tick the "Decode after EME delay" box in the settings.
#EME #amsat #hamradio #hamr #moonbounce
7/9 Head over to mmmonvhf.de to find days with low degradation. Not necessary to pick lowest possible. To plan further you can use VK5DJ #EME planner or any Moon forecast service (e.g. TimeandDate)
#amsat #hamradio #hamr #moonbounce
8/9 When ready use the HB9Q Chat but never use it to exchange reports while the QSO is ongoing
#amsat #hamradio #hamr #moonbounce
9/9 I have also made a random (unscheduled) #EME QSO with Bernd DL7APV today using this small #GreeenCube setup while he was calling CQ. His signal was audible at times.
#amsat #hamradio #hamr #moonbounce

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More from @M0SKN_SA5IKN

Nov 1, 2022
LNA / preamp is an unpopular topic of the portable SAT discourse. Noise figure (NF) is assumed to be low due to absence of long cables. But what if NF of the system inherently is not top tier? Any benefit in using LNA with FT-817 & FT-818? 🧡
#hamradio #amsat #amateurradio #hamr ImageImageImage
NF & MDS are determined by the quality of the signal chain and the venerable FT-818 is not a star in that department. Under exact same conditions (antenna, cable etc) a very weak signal readable from IC9700 would not be copyable from FT-818. 2/7
#hamradio #amsat #hamr Image
The comparison of NF & MDS of IC705, IC9700 and FT-818 assumes favourable IMD performance of the FT-818 with a 500 Hz filter. In the field this is rarely true and even less so with a passband of 3 or 2.7 kHz in SSB. 3/7
#hamradio #amsat #amateurradio #hamr Image
Read 8 tweets
Oct 17, 2022
When operating SAT-portable, the automatic Doppler correction of 2xFT-818 can be conveniently performed by a #RaspberryPi Zero W running #Gpredict and #Hamlib. Proven solid and reliable in DXing over the last 2 years. Read on for details 🧡

#amsat #hamradio #amateurradio #hamr
Doppler adjustment can be made manually but beyond calling CQ things get cumbersome. An automated tracking allows to quickly hop between different stations in the very limited time of the pass. For DX skeds this setup brings you spot on on the transponder frequency. 2/8 #amsat
RasPi connects to the WiFi hotspot of my iPhone enabling control and time sync. RTCZero backs up the system time. 2x CH340 USB-TTL converters connect the FT-818s to the Pi through Zero4U hub. 3/8
#amsat #hamradio #amateurradio #hamr #raspberrypi
Read 8 tweets
Jun 3, 2022
How portable can a #QO100 station be? Ultraportable, when running #FT8. No dish, <100 mW out (note the 3dB attenuator) and a 5000 mAh battery can power it for the whole day. 486 FT8 QSOs using this setup from JO89πŸ‡ΈπŸ‡ͺ so far. Few notes and thoughts
#amsat #hamradio #GHz_bands #hamr ImageImageImage
This is neither the most light-weight nor elegant setup, yet it takes less backpack space than my LEO gear (2xFT-818 & Arrow). The size can be further cut down if an SDR is used. I don't do #SOTA or #POTA but have not heard of anyone adopting similar approach in their activations
1) 13dBi RHCP cavity-backed patch antenna on TX (FPV drone racing antenna will do)
2) Bare, modified single LNB on RX
3) Primitive bias tee and high-pass filter to enable GPSDO input and IF out from LNB via one cable
4) DXPatrol upconverter
5) Leo Bodnar GPSDO
6) Cheap SDR dongle
Read 4 tweets

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