I have an old Hallicrafters Transceiver that uses TRW PT5651 RF transistors as the Driver and P/P finals. It is a 10 watt 2-18 mhz transceiver used in the early to mid 60's. The finals are shot and I am looking for replacements. 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

prc74b wrote:
I have an old Hallicrafters Transceiver that uses TRW PT5651 RF
transistors as the Driver and P/P finals. It is a 10 watt 2-18 mhz
transceiver used in the early to mid 60's. The finals are shot and I
am looking for replacements. 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




Does the transceiver have a model number?

No marking of any kind on the unit. But I believe to be a Hallicrafters TR-9.

"prc74b" wrote in message
news
I have an old Hallicrafters Transceiver that uses TRW PT5651 RF
transistors as the Driver and P/P finals. It is a 10 watt 2-18 mhz
transceiver used in the early to mid 60's. The finals are shot and I
am looking for replacements. 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

Thompson Raito Woolrich was bought by Northrop Grumman a few years ago. I
doubt it but you could always try their parts division.

prc74b wrote:
I have an old Hallicrafters Transceiver that uses TRW PT5651 RF
transistors as the Driver and P/P finals. It is a 10 watt 2-18 mhz
transceiver used in the early to mid 60's. The finals are shot and I
am looking for replacements. 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

prc74b wrote:
'Dave[_18_ Wrote:
;651539']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, or 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



-
Does the transceiver have a model number?

No marking of any kind on the unit. But I believe to be a
Hallicrafters TR-9.




That's a bad-ass looking radio.

http://www.qsl.net/la5ki/big/tr9.jpg

I believe that I used to have one of those. It had a 6kHz mechanical filter,
a roller inductor matching network, and it was AM and CW mode. I ended up
selling it at a hamfest several years back for 40 dollars. A nice piece.

Pete

"prc74b" wrote in message
news

'Dave[_18_ Wrote:
;651539']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, or 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



-
Does the transceiver have a model number?

No marking of any kind on the unit. But I believe to be a
Hallicrafters TR-9.




--
prc74b

No, mine was a different model. This is really cool looking.


"Dave" wrote in message
...
prc74b wrote:
'Dave[_18_ Wrote:
;651539']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, or 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



-
Does the transceiver have a model number?

No marking of any kind on the unit. But I believe to be a
Hallicrafters TR-9.




That's a bad-ass looking radio.

http://www.qsl.net/la5ki/big/tr9.jpg

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