• 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.

choke input ripple level?

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So.... your hum is lower than the noise floor? This is good.

Of course, we want no hum at all. So we want to find out if the hum is actually from the B+ or another source.

Do you see 10VAC on the 200VDC B+ line? Bad. However it should sound much louder than less than the ssssss.

How are you looking at the 10 volt AC?

Have you actually used 50H chokes???

Need more info, please.

Thanks!
Gabe
 
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