During the last Ilmari flight I have recorded the linear transponder
passband signals using SDR-IQ digital receiver. The whole passband,
50 kHz wide was recorded during quite significant part of the flight.
The beacon was also recorded during some time.

The files are quite large, about 200MB for 15 minute recording.
My setup in KO38HJ was 9wl M2 antenna+preamp (about 0.4dB NF) and
a converter base on an NMT basestation RF front-end with it's IF (28MHz)
fed to the SDR-IQ receiver input. A signal generator (HP8662) was used
as the LO.


ES5PC Viljo