- some notes on my 70 MHz OZ transverter - Finnish amateurs now have access to the 4 meter band - also thoughts on using the FT897D with a transverter (30.08.2009)
- instructions on modifying an 80 MHz band rubber duck antenna to 70 MHz, by Juhani Lehtosaari, OH2MD (in Finnish)
- my version of the OE9PMJ 50 MHz transverter, Po = 20 W PEP, Nf = 1 dB ( outside and inside )
- reworking the OH9VHF and OH9SHF beacons
- a old, but fun photo of the very serious 6 m mobile antenna installation of OM Jan, OH1ZAA ;-)
- several GaAs-FET preamplifiers for troposcatter communication ( example of prototype, ( 79k )
- filters, mixers, power amplifiers
- EER (HELAPS) experimental amplifier
- 144 MHz beacon, 10 W out, not QRV yet
