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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: Cathode Follower Line Stage posted by Triode_Kingdom on May 16, 2017 at 10:05:46:
"The negative supply is at AC ground, so the resistor can be connected to either point."
Obviously I haven't seen the PSU schematic and I wouldn't want to make any assumptions, but I'm a bit confused by this comment. Could you please elaborate a bit on the AC ground perhaps with a schem? I don't want to hijack this thread by taking it off on a tangent, so if you want me to start a new thread I'll be glad to do it.
PS. About three years ago I had devised a similar circuit for driving a 300B. It used the 5687 as a CF, DC coupled to the grid of the power tube with an appropriate (by taking the 300B's biasing into consideration) negative supply at around -100V, very similar to what you show in your schematic above minus the coupling cap. All this to say, that my interest in this is more than academic.
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Follow Ups
- RE: Cathode Follower Line Stage - sideliner 12:46:30 05/16/17 (2)
- Cathode Bias - Triode_Kingdom 20:27:40 05/16/17 (0)
- RE: Cathode Follower Line Stage - Tre' 15:20:28 05/16/17 (0)
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