W7GZ Ham Radio Page

• Icom IC-706:  No Power Output in FM Mode


Solution:  Realign FM oscillator section
 

Procedure
Board layout

• Restoring Passband Tuning to Icom IC-x75 Radios


See my article from Proceedings of the Central States VHF Society.
 

• A 144 MHz GI7B Power Amplifier


This construction article appeared in 1987 in Radiotechnika magazine (Hungary).  The amplifier was designed by Gabor Draskovits, HA1YA, who produces similar amplifiers commercially for export.  The GI7B is a Russian triode suitable for operation at 13 and 23 cm, as well as 6 and 2 meters.  The tubes are readily available from several vendors in the Ukraine at quite reasonable prices.  The text of the article is in Hungarian, of course, but the schematics and construction layouts are easy to follow. The second half of the article is a 4CX250B amplifier for 432 MHz.
 

The data sheet for the GI7B tube is provided here.

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