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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: parallel cathode bias resistors: "ghosting" effect posted by dave slagle on March 31, 2012 at 13:05:23:
Dave,
Hi. The Rk resistors are made to be identical, so as not to ghost.
Multiple bypass film caps are purposely selected to be non-identical, and serve a different function.
Each value of film Rk bypass cap will play a different part of the audio spectrum, and a linear-sounding "overall combination" of multiple bypass film cap values gets to be selected and determined by ear.
A single Rk film cap will "tune" to the single cap's value. Film Rk caps are not linear when playing music, despite rudimentary sine wave bench testing.
Cheers,
Jeff Medwin
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Follow Ups
- RE: parallel cathode bias resistors: "ghosting" effect - drlowmu 18:03:36 03/31/12 (6)
- RE: parallel cathode bias resistors: "ghosting" effect - dave slagle 19:58:53 03/31/12 (2)
- Touche~ Dave (nt) - wheezer 09:44:57 04/01/12 (0)
- Hardly (nt) - drlowmu 21:06:54 03/31/12 (0)
- No, three or more resistors of non-identical values will produce better results - elblanco 19:54:11 03/31/12 (2)
- ElBlanco is making me Happy here: will produce better results - Minussss3db 12:34:30 04/01/12 (0)
- Yes !! - drlowmu 21:12:02 03/31/12 (0)
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