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Questions about tubes and gear that glows. FAQ

Re: freq response

> try it through equal coupling caps and a grid resistor.

Load was 100K bias resistor and a standard probe.
The difference is a 12AT7 at 4 mA vs. a 12AX7...

My friend built a second amp and measured 175 VDC on the voltage amp plate and 130 VDC plate-to-cathode on the splitter, just intended by design.

It measures well and sounds as extended.


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