BeePre 2 voltage problem

PeterG · 532

0 Members and 1 Guest are viewing this topic.

Offline PeterG

  • Newbie
  • *
    • Posts: 1
on: March 16, 2023, 09:29:39 AM
I have completed the wiring on the BeePre 2 preamp except for the selector switch and connections to the RCA inputs.  Running voltage tests, I'm showing 6.36 DCV at both tube sockets, but when I insert the 300B tubes, the filaments light up but after about a minute they both go dark.  Is something in the circuit causing a voltage drop?  Whatever it is, any ideas about how to track it down/fix it?  Thanks.



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19439
Reply #1 on: March 16, 2023, 11:07:39 AM
You shouldn't have 6.3V DC at both sockets with the 300B tubes installed.  Can you post some build photos?  Are you 100% sure that the sockets are installed in the correct orientation?


Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man