Toggle sidebar Toggle sidebar
  • You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • Retevis is giving away Radios for the New Year and Every Member is Eligible. Click Here to see the details!

Tram D201 no am reception

thanks for the info. The Tram receiver finally went out completely. it crackled then silence I checked the 5.8 mhz its there and steady. so, i checked the the tube voltages again. i found v400 pin 6 was not reading any voltage. it should be about 109v. I checked r402 a 47k resistor. and it had no voltage on one side, and 306v on the other. I soldered in a new 1/2 w 47k resistor. and its working again. i found a tiny hole in the old r402. I hope this is the one i have been looking for.
 
Last edited:
  • Like
Reactions: Shadetree Mechanic and TM86
I noticed some trams have two black square filters. and some have yellow round filters. and some have a combination of both im thinking of changing them out but I am hoping that r402 and t302 was the main causes of the receive problems i was having. also cleaning made a really big difference. some of the tubes may be weak even though i purchased a tube kit from ebay . i checked the bad resistor, r402 when receive was intermittent it showed correct about 47.5k ohms. i was not able to find it was bad until after the thing went out all the way. Its frustrating trying to find intermittent problems.
 
Last edited:
So far its receiving fine. I kept it running all day I noticed after removing the r402 the old resistor did not show any measurement, and it had cracks and a tiny hole in it. the cracks were hard to see, they were around the resistor where the edge of the stripes are. its hard to get a good look at the parts when they are in the radio. Thats why i am happy i replaced most of the old resistors and can capacitors with a kit i bought on ebay awhile back when i first bought this Tram D201
 
Last edited:
Now that i have the receive on again. i have noticed the r427 power calibration is not working I have cleaned it but it goes off and on. so, i ordered the 2,5 meg ohm. trim pot from Barketts. I also bought two 6gh8 tubes. to put in v602 and v401 for the meter. This radio uses 5 of these. so its good to have some extra. I read the 6gh8 is a common tube that breaks down easily.
 
Last edited:
i noticed the bottom of the lid above the audio tube v603 is turning dark i was using the tall russian tube that gets closer to the lid. i found a short 6L6 to put there and it sounds better.
 
  • Like
Reactions: Shadetree Mechanic

dxChat
Help Users
  • No one is chatting at the moment.


      Top Bottom