Montgomery Wards GEN 719A

[NZ8N]

Radio Shack TRC-450 uses PC622AA
Service Manual (CB Tricks copy) and Schematics (PDF and PNG)

 

[TM86]

Thx. very much.. Do U know if Ward had a SSB Base Radio?? W.G.

If they did it was most likely a 23 channel. Not saying a 40 channel model doesn’t exist, just that if it does it would be exceedingly rare and is probably owned by a unicorn.

 

[TM86]

Radio Shack TRC-450 uses PC622AA
Service Manual (CB Tricks copy) and Schematics (PDF and PNG)

View attachment 57147

Nice find, thanks!

 

[W.G. Davis]

If they did it was most likely a 23 channel. Not saying a 40 channel model doesn’t exist, just that if it does it would be exceedingly rare and is probably owned by a unicorn.

Unicorn, sounds like me, 74, live by myself, no other humans.. If anyone finds one (23 or 40 channel) I would like to buy it.. I just bought a Ward 702.. I am also looking for a General Radiotelephone MC-9 & a SB-72 (SSB).. And a Craig L232 which is a SSB model.. Thx. to everyone for their help.. 73, W.G. Davis/ K4WGD and KCX-1723 (I wish the FCC would have kept the CB License program)

 

[TM86]

Pulled this thing off the shelf I had thrown it on to look at when I got smarter. Wasn't getting any smarter after three years so I thought I'd take another crack at it just to see if maybe my dumb ass could fix it anyways.

The AM no transmit problem turned out to be an own goal. The pinout of the substitute transistor (NTE85) was different from the original (2SC711) and I had somehow missed that. Turned TR34 around and AM transmit is working again.

Thanks again to those who provided technical documentation. What clued me in was that the NTE85 is also a replacement for the 2SC945, and this radio has both the 2SC945 and the 2SC711 in it. Looked them up in the doc NZ8N provided to find that they have different pinouts. You already know how the rest of the story turned out.

Don't know why I didn't think of that three years ago.

 

[doffo]

Pulled this thing off the shelf I had thrown it on to look at when I got smarter. Wasn't getting any smarter after three years so I thought I'd take another crack at it just to see if maybe my dumb ass could fix it anyways.

The AM no transmit problem turned out to be an own goal. The pinout of the substitute transistor (NTE85) was different from the original (2SC711) and I had somehow missed that. Turned TR34 around and AM transmit is working again.

Thanks again to those who provided technical documentation. What clued me in was that the NTE85 is also a replacement for the 2SC945, and this radio has both the 2SC945 and the 2SC711 in it. Looked them up in the doc NZ8N provided to find that they have different pinouts. You already know how the rest of the story turned out.

Don't know why I didn't think of that three years ago.

Was TR34 near the back next to the AM Regulator? Reason I ask is because I fixed a President AR144 radio this way. It was transmitting on AM, but that transistor was getting HOT instantly. Put in a 2SC945 in its place and its working nice and cool.

Though that radio is like the Cobra 146 GTL, sadly modulation struggles. You basically have to yell into the mic. On the Cobra 146 GTL its great without a power mic.

 

[TM86]

In this chassis TR34 is part of a Darlington pair along with TR35 that make up the AM regulator/modulator. TR34 is the big TO-220 transistor bolted to the case in the back corner, and TR35 sits next to it on the board.

I don't know if that's similar to the AR144 or 146 GTL or not, because I've never cracked either of those open that I can recall. I did note the lack of modulation adjustment on the 719A. Guess I should look at the schematics for the other two and see what, if any, the differences are and if that problem is fixable. Should only take me another three years or so.