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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: RE: Wouldn't doing that increase HD? posted by Triode_Kingdom on May 13, 2024 at 20:37:00:
That's a little different.
In your example when C82 goes to zero ohms, the tube is still seeing 15k.
That would not be the case if he "just bypass[ed] the plate resistor with 250 to 500pf cap".
It's not a big deal, I was just pointing that out.
I've also seen phono preamps with "one shot" RIAA filters with impedances so low that the first stage won't stand a chance driving it. In the discussion that followed people were trying to tell me that that is how filters work....by "choking" the tube. :-)
I tried to explain that you can make R1 big enough so A1 (if it were a triode) is not being loaded down. I'm not sure how many understood.
All I'm saying is, you can use a filter to contour the frequency response without placing the tube driving that filter in distress.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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Follow Ups
- RE: Wouldn't doing that increase HD? - Tre' 07:32:51 05/14/24 (5)
- It boils down to the circuit having by far the biggest impact on sound - Chip647 08:51:06 05/14/24 (4)
- "people want or need tone controls, absolutely... Sometimes must correct for Engineers or Charlie Parker - Cleantimestream 13:21:49 06/01/24 (0)
- RE: It boils down to the circuit having by far the biggest impact on sound - SoundMann 03:32:14 05/19/24 (1)
- RE: It boils down to the circuit having by far the biggest impact on sound - SoundMann 12:38:09 05/19/24 (0)
- agreed. nt - Tre' 08:58:06 05/14/24 (0)
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