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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Yes, it does seem small... posted by Triode_Kingdom on January 9, 2025 at 16:10:02:
If you leave the transformer out (it's only there for a unbalanced output) then you're left with the 15k in series with (2.7k//whatever the input impedance of the amp is). If we call that 2.7k then, with the attenuator turned all the way up, the .47 cap is playing into 17.7k. 2nd edit, Ralph already said this.That gives a -3db point of 19.13Hz. That would still be 1db down at 38.26Hz and there would be phase shift all the way up to 191Hz. Turning the attenuator down would make it better but having a high pass filter, in the audio band, that changes with the volume control setting is bad form.
I mis-spoke. That's not the volume control, it's the trim. So it's not as bad as I thought.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 01/09/25 01/09/25
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- RE: Yes, it does seem small... - Tre' 16:27:48 01/09/25 (0)
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