On Tuesday, March 23, 2021 at 7:50:35 PM UTC+1, Phoenix wrote:
used Trig / Becker or Dittel radio with or without boom mic

I can supply you wit quite a late model Becker 4201 if you are looking for something with 25khz.
I probably have a mic lying round somewhere too
You can contact me at hcdswiss at gmail dot com