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In Reply to: RE: Here's my version posted by Triode_Kingdom on April 22, 2025 at 08:42:30
TK,Thanks for sharing the schematic. I like that you have the cathode resistors for both gain stages un-bypassed. Just to clarify, are both sections of the 6BQ7 CF buffer connected in parallel for each channel?
Edits: 04/22/25
The 6BQ7 is shared between channels, one section each. Here's a pic of the preamp I built that uses this circuit. The phono tubes are shielded, and the 6BQ7A is just to the right of those. It puts on a nice light show!
Is that all point to point wiring or printed circuit board?
Any pics under the hood?
Yes, all the audio is point-to-point with many parts held on turret/eyelet boards. The control circuitry and most of the power supply parts are on PCBs. Sorry, I'm not anxious to post the innards. It's extremely crowded and by no means an example of how to build a preamp.
I was curious how you packed all that wiring in that small chassis.
TK,
Thanks for the clarification. Congrats, that's one heck of a build! Very nicely done! It could certainly pass as a commercially bought preamp with all these nicely machined parts as part of the chassis.
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