Bottlehead Forum

Bottlehead Kits => BeePre => Topic started by: kaleb on March 11, 2015, 01:15:29 PM

Title: Another wonderful beepre (and 6BQ5 tube question)
Post by: kaleb on March 11, 2015, 01:15:29 PM

I finally finished my Beepre build ordered back in Oct  (somehow there was never quite time at home with an 11month old  :) ).

Similar to this thread, I found A1/B4 resistances climbing into the 500Ohm-1kOhm range instead of dropping to 4Ohm:
http://bottlehead.com/smf/index.php?topic=7522.msg72511#msg72511

I pushed ahead to voltage measurements. All are in spec except for C3/D3 on the nine-pin sockets. I measure 9.2V on C3 and 4.5V on D3. The high value moves with the 6BQ5 if I swap them.

It sounds beautiful, but does 9.2V at C3 on one of the 6BQ5's indicate a problem I should replace the tube for?

Thanks in advance! Kaleb

Title: Re: Another wonderful beepre (and 6BQ5 tube question)
Post by: Paul Birkeland on March 11, 2015, 04:14:19 PM

The important thing about the C3 voltage is that it's above 3V and below 32V, but otherwise it isn't very critical.

-PB

Title: Re: Another wonderful beepre (and 6BQ5 tube question)
Post by: kaleb on March 11, 2015, 04:40:22 PM

Good news. Thank you! The beepre is running great - only a few hours of burn in so far and it is magic.

Kaleb