Blown 300B, help requested [resolved]

Bobinsms112 · 15433

0 Members and 2 Guests are viewing this topic.

Offline Bobinsms112

  • Jr. Member
  • **
    • Posts: 18
Reply #15 on: June 18, 2022, 10:17:24 AM
x pad B side = 204 (left channel) 
x pad B side = 297 (right channel)

I reheated several joints on the board and checked the resistances on the sockets and they match the other side. 

Thanks,
Matt 



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19823
Reply #16 on: June 19, 2022, 05:52:24 AM
This is the pad of interest.  The voltages you reported wouldn't make a lot of sense for this spot in the circuit.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Bobinsms112

  • Jr. Member
  • **
    • Posts: 18
Reply #17 on: June 19, 2022, 10:47:07 AM
Hi Paul, you are correct.  I re-checked and the x pad = 2.49 on both channels.

Thank you,
Matt



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19823
Reply #18 on: June 19, 2022, 11:01:04 AM
Well, the last debugging step is to trade boards between channels to see if the problem follows a board (it probably will), and if so I would just order a replacement. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Bobinsms112

  • Jr. Member
  • **
    • Posts: 18
Reply #19 on: June 26, 2022, 11:17:41 AM
Hi Paul, looks like it followed the board.  Will order a replacement board and post back once i can get it hooked up. 

Thanks
Matt



Offline Bobinsms112

  • Jr. Member
  • **
    • Posts: 18
Reply #20 on: July 17, 2022, 01:52:37 PM
New board in and fired her up - all good now.  Thank you Paul for your assistance!