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RE: starved filaments

Posted by deathtube 667 on April 11, 2014 at 03:44:55

In Reply to: RE: starved filaments posted by GSH on April 10, 2014 at 20:37:23:

I use DC filaments on 2A3 finals. Non-regulated and I had previously used a rheostat bypassed with a power resistor for voltage control.

I'll need to try to set that up again to run the starved filament test.

When I ran the FFT bandwidth sweeps with white noise input and , I noticed that there was a big spike at 120 cycles that went up and down more than +/-5dB.

At 120 cycle spike was a big lower using pink noise.

Perhaps I don't have enough filtering for a stereo circuit or some other reasons.

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