Quote:
Originally Posted by Michael[_4_]
prc74b wrote:
I have an old Hallicrafters Transceiver that uses TRW PT5651 RF
transistors as the Driver and P/P finals. I can not find data sheets, specs, are
any information on these anywhere. Its like they didn't exist. I am
looking for any type of replacement. I can't even tell if they are Pnp
or NPN. They are single stud mount, with 4 solder tabs. The curcuit
is broadband, and the B+ is 12-14 volts.
Thanks for any help.
Joe Munson
WA4VAG
You need to find out whether these are pnp or npns.
I have used 2N6083's to replace npn hf outputs before. They worked fine.
I think they are only capable of 30 watts output. They work fine with 12
volts. They only cost about 4 bucks a pieces at
http://www.americanmicrosemi.com/pro...arch/index.php |
I will look up the spec sheets on the 2N5883. I have thought about just building a small 10 watt RF PA, using modern components and putting it in the set, leaving the orginal pa in it, and maybe some day getting replacement parts. So far, from the really bad copy of a schematic, and with the finals and driver shorted, cannot tell if they are npn or pnp.
Thanks for the information
joe