BeePre 2 voltage problem

PeterG · 532

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Offline PeterG

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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

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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