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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: It's OK to do this on voltage amplifying stages. posted by Ray Moth on July 10, 2006 at 05:19:04:
Hi.for phonostage, & the like LOW signal front gain stages with cathode shorted direct to ground. So not cap & no resistor in the signal path. This is gridleak bias through a large gridleak resistor.
Only when the signal level is too small enough to induce grid currents significant enough to harm the sound.
I am really tempted to build a phonostage with non-NFB RIAA whereby
BOTH the 1st & 2nd stage can go with gridbias, with cathodes grounded. It reportedly sounds pretty good vs other conventional biasing methods.
c-JPS: Russ: just back to my desk after my vacation, will reply to yr email.
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Follow Ups
- Better go without cathode bias resistor too, .... - cheap-Jack 12:28:12 07/10/06 (0)
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