Tram d201a no SSB

[reddog63]

I got this tram  D201A from a friend he had it updated works great 👍 
but can get ssb to work ! What am I doing wrong ? 

[2600]

Um, okay.

Can't get SSB transmit to work?

Or can't get SSB receive to work?

Or can't get either one?

Starting point for transmit trouble is the balanced-modulator circuit board. The plug-in pins will have a layer of schmoo on them by now. Pulling the board, scrubbing the pins' surfaces with a solvent-soaked cotton swab will reveal dark streaks until that pin is clean. One by one get them scrubbed with solvent only. DO NOT try to use any kind of abrasive.

The socket contacts around the edge of the board can be cleaned with an electric-razor brush or similar size and solvent. In a pinch isopropyl alcohol from the medicine cabinet works okay.

The five electrolytic capacitors on that circuit board will fail soon if they haven't already. And if any of they have failed already, that can stop the transmit signal dead in its tracks on sideband.

As for receive side, just find all the discolored or burned resistors along the front edge of the receiver circuit board. And if they all look okay, that means the radio was never operated for very many total hours.

Naturally all the receiver tubes have to be okay. If you haven't tested them, it's an open question how much this has to do with the problem or problems.

When a radio gets this old, never assume you have only one problem.

73

[reddog63]

A friend gave it to me when he pass away ! He had it all tune up 350.00 to get it up and running! 
he never could dial in on ssb ! So I took board out clean it ! Still I can make out what they are saying or get out ! 
what tube is it they all light up ! The am side works get love it ! And is there a owner book for this tram D201A ? 
still not know what some of the buttons are for ! I have a 2000 cobra but I here this one sound so much better ! 
I need my ssb to work now ! Lol any help would be great I live in sandiego 

[cbrown]

Tram D201A manual:

www.cbtricks.com/radios/tram/d201a/index.htm

[reddog63]

Thank you so much 😊👍

[reddog63]

Sept 14, 2021 0:00:21 GMT -5 2600 said:

Um, okay.

Can't get SSB transmit to work?

Or can't get SSB receive to work?

Or can't get either one?

Starting point for transmit trouble is the balanced-modulator circuit board. The plug-in pins will have a layer of schmoo on them by now. Pulling the board, scrubbing the pins' surfaces with a solvent-soaked cotton swab will reveal dark streaks until that pin is clean. One by one get them scrubbed with solvent only. DO NOT try to use any kind of abrasive.

The socket contacts around the edge of the board can be cleaned with an electric-razor brush or similar size and solvent. In a pinch isopropyl alcohol from the medicine cabinet works okay.

The five electrolytic capacitors on that circuit board will fail soon if they haven't already. And if any of they have failed already, that can stop the transmit signal dead in its tracks on sideband.

As for receive side, just find all the discolored or burned resistors along the front edge of the receiver circuit board. And if they all look okay, that means the radio was never operated for very many total hours.

Naturally all the receiver tubes have to be okay. If you haven't tested them, it's an open question how much this has to do with the problem or problems.

When a radio gets this old, never assume you have only one problem.

Ok bud I took board out clean it ! I  get ssb  now hear them great ! But I can’t put out no Transmit ! The needle moves when I talk . Is there a tube that’s makes it transmit on ssb ? It works great on am ! So I know I getting out ! But not on ssb 
you can email me if like at j_elby @ Hotmail.com I am john thank you john reddog63 

[Sandbagger]

Sept 17, 2021 11:35:59 GMT -5 reddog63 said:

Sept 14, 2021 0:00:21 GMT -5 2600 said:

Um, okay.

Can't get SSB transmit to work?

Or can't get SSB receive to work?

Or can't get either one?

Starting point for transmit trouble is the balanced-modulator circuit board. The plug-in pins will have a layer of schmoo on them by now. Pulling the board, scrubbing the pins' surfaces with a solvent-soaked cotton swab will reveal dark streaks until that pin is clean. One by one get them scrubbed with solvent only. DO NOT try to use any kind of abrasive.

The socket contacts around the edge of the board can be cleaned with an electric-razor brush or similar size and solvent. In a pinch isopropyl alcohol from the medicine cabinet works okay.

The five electrolytic capacitors on that circuit board will fail soon if they haven't already. And if any of they have failed already, that can stop the transmit signal dead in its tracks on sideband.

As for receive side, just find all the discolored or burned resistors along the front edge of the receiver circuit board. And if they all look okay, that means the radio was never operated for very many total hours.

Naturally all the receiver tubes have to be okay. If you haven't tested them, it's an open question how much this has to do with the problem or problems.

When a radio gets this old, never assume you have only one problem.

Ok bud I took board out clean it ! I  get ssb  now hear them great ! But I can’t put out no Transmit ! The needle moves when I talk . Is there a tube that’s makes it transmit on ssb ? It works great on am ! So I know I getting out ! But not on ssb 
you can email me if like at j_elby @ Hotmail.com I am john thank you john reddog63 

Just to clarify a point; you do know that there is no carrier on SSB right? There will be no transmit power until you talk.