SM6FHZ 432 MHz EME Power Amplifier
The power amplifier is a GS23b tetrode in a Russian TV Tx-cavity now delivering about 1000 watts RF, but capable of more than that.
Ua: 3000 V
Ug2: 500 V
Ia0: 100 mA
Ia: 600 mA
Ig1: ~1 mA
Ig2: ~2 mA
Pin: 22 W
The front panel of the 70 cm PA during construction.
The interior of the 70 cm PA during construction.
The 3 phase high voltage power supply, 3000 V, >2 A:
Parts of the
cavity before and during examination and rebuilding for 70 cm operation:
Anode decoupling Anode cavity Input connector Output coupling adjustment axis
The cavity originates from a TV transmitter in Murmansk, I was told by Dr. Alex, UR4LL. It was brought to Weinheim where I should pick it up on the behalf of SM4IVE, Lars. I met with UR5LX, Sergej and UR4LL, Dr. Alex during the UKW Tagung in Weinheim in September 1994.
We all sat together in the big van of Rainer, DF6NA, chatting and drinking Ukrainian vodka together with DL9KR, Jan, SM6CMU, Ingo, SM6KJX, Jan, and others. I got the cavity and transported it to Sweden in the car of SM6CMU, Ingo.
happy hams from Ukraine and Sweden in Weinheim, Germany in September
Updated August 22, 2009. http://www.2ingandlin.se/SM6FHZ.htm