4 U 1 ITU


4U1ITU invitation - 7 bands EME

432 MHz - 24 GHz

23rd of September - 1st of October 2018


last update on 15.10.2020





I am very happy to announce, that on 6th of May 2018 I got official invitation to join the 4U1ITU team for EME operation. It will be 7 bands EME activity in cooperation with 4U1ITU team (Attila OM1AM and Nick SV3SJ) and Braňo OM3YFT

4U1ITU got a special - time limited permission from the OFCOM to work all bands EME.

Permission is not valid for terrestrial transmitting !!!



Donation received, thank you for your CONTRIBUTION AND SUPPORT !!!




4U1ITU log 432 - 24048 MHz


432 - 1296 - 2320 - 3400 - 5760 - 10368 - 24048 MHz



PDF presentation about EME in 4U1ITU




22/09/2018 - car loaded and ready to go




QSL policy


About EME 4U1ITU activity


Road Prague - Geneva

www.seznam.cz - maps


Band MHz Unit Antenna
432 IC9100 GPS locked + SSPA 1 kW - V/H polarization switch 3,2m dish V/H pol. - 0,4dB N/F OK1DFC - OE5JFL control
1296 IC9100 GPS locked + SSPA 1 kW circular 3,2m dish - 0,2dB N/F HB9BBD - OE5JFL control
2302 - 2304 - 2320 - 2400 IC9100 + TRV GPS locked + SSPA 100 W circular 3,2m dish - 0,4dB N/F G4DDK - OE5JFL control
3400 IC9100 + TRV GPS locked + SSPA 100 W circular 3,2m dish - 0,7dB N/F DB6NT - OE5JFL control
5760 IC9100 + TRV GPS locked + SSPA 100 W circular 1,8m solid dish - 0,9dB N/F DB6NT - OE5JFL control
10368 IC9100 + TRV GPS locked + SSPA 50 WV-pol 1,8m solid dish - 0,6dB N/F DL3BPC - OE5JFL control
24048 IC9100 + TRV GPS locked + SSPA 10 WV-pol 1,8m solid dish - 1,1dB N/F DL3BPC - OE5JFL control
432 - 24048 MHz SDRplay - RSP2pro & SDR14 - monitoring receiver, Noise measuring Spectra View SW

New tripod for MW bands and 180cm solid dish. POSITAL inclinometer and OE5JFL controller

Detail to zero back slash gears and libel for exact adjusting of zero plane level


24 GHz tested and works

Worked were OK1KIR even spread on the signal was 300 Hz



  • We expect to announce all details or changes on Miles and more, HB9Q, N0UK and here on web.
  • In the main time we will work first all stations by CW, than when CW traffic slow down, we will be switching also to WSJT for all stations interesting to work us in that mode too. We are able to switch between CW and JT according request if not so busy in QSOs. We expect to have chance change also bands if not busy on presented band.
  • During ARRL EME contest, first Moon pass we will be QRV 5760 MHz ! Means that not only from 00:00 UT on Saturday, but from our Moonrise in Friday around 19:25 UT. We expect to have clear horizon for East and will work in maximum length of our Moon window. Moonset part is behind ITU tower, see picture. Than we exchange TRV for 10368 MHz and will be QRV next Moon pass in contest on 3cm. Sunday we will change TRV and will be QRV on 24 GHz again full Moon pass till Moon will be behind building.
  • On 432 MHz we can turn  V or H pol !!!.
  • 2,3 GHz - With RX unit we will cover all existing ham radio frequencies on EME and expect to work everybody from Australia, Japan, EU and USA. We will TX only 2320,100 and 2304,100 !!!
  • 10 GHz - courtesy of Yoshiro JA4BLC we will be able to RX on 10450 MHz, on TX thanks to Mirek OK2AQ we will have 50W RF and new very precise 180cm dish thanks to Eddy ON7UN. New 24 GHz band will have around 10W RF.
  • We prefer QRG xxxx.100 on all bands.
  • On 432 - 2320 MHz bands we will use WSJT 10 and 3400 - 24048 MHz WSJT-X with Doppler shift correction to whom who is not so much familiar with that. We can work CFOM and due to automatic tuning control by 1 Hz and GPS locked LO our signal will be very stabile. Do not forget to put our call sign 4U1ITU and locator JN36BF to the WSJT .txt3 data base !!! Check WSJT work condition described by Rene PE1L bellow.
  • No chance to have permission to work on 144 MHz and other bands !!! Also terrestrial transmitting is not allowed under our OFCOM permission !!!


Some tips to help us to QSO with you on JT65B and C !
  • Add us to Call3.txt
  • Please call us when you CAN copy us. No need to have a good decode from us,
  • You will decode us when we call you. Usually you can't decode signals -24 till -31 which are not for you, you see a # indicating we call someone else
  • You don't need stop calling us when we are in QSO by JT65 with someone else, after a QSO we will call the next station but only if he was TX'ing the period before.
  • Don't hop around QRG, choose a freq to call us and stay there for a while. If you stop TX'ing, listen the next period and then change freq if you want.
  • We will not TX 73, if a QSO is complete by RX'ing 73 from you we call CQ or another station. (QSO is complete if both stations received both calls, a report and one or more R)
  • You need to send 73 after you got our RRR, its good to know for us that we can call the next station.
  • We don't have a special station and we can't make more then 10 qso's a hour, it takes patience to QSO with us.
  • More and more stations are locked at 10 MHz, keep in mind you can end on top off each other at 144 MHz. Use some offset.
  • If you are familiar with the `Lance Procedure` you can call us that way.

(PE1L text)

Some tips to help us to QSO with you on EME MW JT4F and QRA64D !
  • Add us to Call3.txt

  • We have available WSJT-X v1.8.0rc2

  • WSJT-X connected to IC9100 allow us to work Full moon Doppler correction if you do not have WSJT-X connected with your transceiver. In this case you will TX and RX on same QRG and we will handle full Doppler correction also for you, but we need to know your locator!

  • We will prefer on 9 - 6 - 3cm CFOM - (Constant frequency on Moon) allow to all others monitoring our traffic. All our units are GPS locked, we will be exactly on our presented QRG.

  • 10368 MHz and 24048 MHz we will mainly use QRA64, JT4F we are able to do according request

  • During MW operation ( QRA64 or JT4F ) - IF YOU SEE we call somebody, please stop to call us till our 73! to avoid interference and extending time for QSO !!! Thank you !!!

Some tips to help us to QSO with you on CW !
  • PLEASE keep all the time 1 min. periods in sked.
  • If you hear that we call other station as is your call, PLEASE stop calling to our 73!
  • If you copy WE call for example G3???? YYYYY call me back in divided groups like GGGGG 33333 LLLLL TTTTT FFFFF to more easy copy your call, do not give us our call, we know it!!!!
  • Please try to call us with little be QRG spread, we have SDR and we will see you are up or down of QRM on echo QRG
  • For CW and JT65B and C we will always RX on our own echo!


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