Hi guys,
I'm new here on this forum and appreciate the comments.
Anyway, here it goes. I have a Tram D201A that works great on AM, (at least 5 watts output and good receive), but on SSB the power drops from 12 watts (or more) to around 1 to 3 watts above channel 16. The radio has the VFO modification to open to transmit and that's what I am using but it does the same thing in crystal mode. After scouring the manual, I think its either the Balance Modulator Board or the ALC circuits on the RF Bridge board. I have removed and reseated the Balanced Modulator Board but that didn't help. I guess I'm not sure which one I should concentrate on or look at something else. The unit actually seems to do better with the mic gain lower rather than higher. Not sure why it drops off above channel 16. Occasionally the SSB RF output drops down across the entire band after it's been on and heated up for a while. I will look at that more today but mostly its just above channel 16. I am using a Byrd wattmeter into a dummy load.
Any thoughts, recommendations or Devine intervention?
Thanks and 73, ScannerHam62
ps: there are some additional mods. It has a temperature controlled fan on the back, a three level RF power switch on the back and the mic jack has been converted internally to accept Cobra pinouts.
I'm new here on this forum and appreciate the comments.
Anyway, here it goes. I have a Tram D201A that works great on AM, (at least 5 watts output and good receive), but on SSB the power drops from 12 watts (or more) to around 1 to 3 watts above channel 16. The radio has the VFO modification to open to transmit and that's what I am using but it does the same thing in crystal mode. After scouring the manual, I think its either the Balance Modulator Board or the ALC circuits on the RF Bridge board. I have removed and reseated the Balanced Modulator Board but that didn't help. I guess I'm not sure which one I should concentrate on or look at something else. The unit actually seems to do better with the mic gain lower rather than higher. Not sure why it drops off above channel 16. Occasionally the SSB RF output drops down across the entire band after it's been on and heated up for a while. I will look at that more today but mostly its just above channel 16. I am using a Byrd wattmeter into a dummy load.
Any thoughts, recommendations or Devine intervention?
Thanks and 73, ScannerHam62
ps: there are some additional mods. It has a temperature controlled fan on the back, a three level RF power switch on the back and the mic jack has been converted internally to accept Cobra pinouts.