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In Reply to: Re: What DaveInVA said... posted by Satelliteman on August 5, 2006 at 16:14:41:
have 5 ohm 5 watt resistors in the cathode circuits. *Nuch* more effective than the 1 ohm resistors of earlier units.
Follow Ups:
I'm sure you meant "much" not "nuch".
Anyway, what does that do to the output impedance? I assume you take the output off the plate with the resistor on the cathode side.
No, we take the output off the cathodes. The cathode resistors are in series with that. But when you total up the entire lot of them, the result is a negligable increase in output impedance. However the tubes work better together so the impedance goes back down a little. The result is lower distortion- meaning better low level detail and smoother sound. The tubes last longer too.
nt.
Oh man - ive just finished wiring in my 1 ohm resistors too ..along with the 150 ohms tonight ....looks like back to the soldering iron for me before before I go much further on the 2nd amp . I new things were going too smoothly
Stu
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