• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

5687 push-pull amp

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tiroth

Member
Joined 2001
anidian.com
Ok. Now that I've had some success with a tube-input SS amp, I've decided to flip things around and try a SS-input tube amp. This would be for highs only in a biamp setup.

This looked like it could be fun, especially since I already have all the pieces.

My request for aid? I'd like a little feedback, BUT, I want to drive the input stage differentially, so there goes my easy NFB port. What are my other options for introducing feedback?

Also, any opinions on CCS replacing cathode resistor and bypass?
 

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planet10

planet10

frugal-phile™
Joined 2001
planet10-hifi.com
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tiroth said:
This looked like it could be fun, especially since I already have all the pieces.
Click to expand...

Bob Danielak is always coming up with cool amps -- many of them quite unusual. His Fiat has tube amplification.

Also, any opinions on CCS replacing cathode resistor and bypass?
Click to expand...

Particularily a good idea on the 1st differential stage.

dave
 
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