Although buzz's boards are a bit different, they are basically the BA-3 front-end (or 'Driver' board) from the store.
Bias is now on the output boards - so you choose either single-ended or complimentary output. Add the FE to that and you have an amp.
You can get it from the DIYaudio store.
Or, you could use a BA-3 (or the other BA front end), or Pumpkin preamp, or Impasse Preamp to drive the BA-output stage directly.
You can get it from the DIYaudio store.
Or, you could use a BA-3 (or the other BA front end), or Pumpkin preamp, or Impasse Preamp to drive the BA-output stage directly.
Actually I said it from memory, and don't remember if it's separate or on the same physical board as the outputs, or on the FE board...
(goes and looks at BA- page...)
Yep, you are right, the bias section is a separate PCB that is packaged with the output boards. (It didn't used to be that way, the first BA had the bias on the Front-End (gain) stage.
All this talk about BA-amps makes me want to build a 6-pair/channel complementary amp...
(goes and looks at BA- page...)
Yep, you are right, the bias section is a separate PCB that is packaged with the output boards. (It didn't used to be that way, the first BA had the bias on the Front-End (gain) stage.
All this talk about BA-amps makes me want to build a 6-pair/channel complementary amp...
For current capacity, I assume. You know I probably want use that many. Will probably split in half and this will be one whole channel.
you assume well
good plan , regarding splitting them
however - you don't need SE resistors going from both rails to output
Didnt feel like correcting it after exporting it.
F5
You know me. Everything is always partially finished.😀
F5
You know me. Everything is always partially finished.😀
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Nope. Level shifters like in normal BA3b. They are necessity, I believe, as the FE is heavily degenerated. Lower degeneration, add a cascode device, and you are probably ok. This v1 in a series of variations. Youll notice the cap is gone. I was going to use single supply, but since I cannot finish today, I will do a second. Go ahead and setup for dual mono final setup. CM and FC output are future revisions.