In article ,
Jimmy wrote:
Bought a literal bushel basket full of old CB amps for near nothing. Many
are tube type mobiles that use inverter power supplies. I am trying to
figure out what frequency the power supply oscilates. My plan is to get some
of the power supplies up and running using a TL494 and Power FETS. What kind
of transistors were used in thes things. Some of them look lie they were
stud mounted and others are obviously TO3. Any help would be greatly
appreciated.

If I were building such a thing, I'd use darlingtons myself. A frequency
counter will tell you what frequency the relaxation oscillator is running at,
though you should be generally aware that it will drop when the load is put
on. Probably in the 15-50 KC region to use cheap magnetics and semis.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."