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Will ccs work with a DHT?
Will ccs work with a DHT?
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Old 19th June 2006, 09:19 AM   #21
snoopyma is offline snoopyma  Hong Kong
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Default CCS-loaded cathoder follower

Quote:
Originally posted by Giaime
It seems so strange to me. I'm using a CCS-loaded cathode follower in my preamp, unbypassed. It works, so? You don't need to bypass the cathodes of SE output tubes if you use a CCS.


Hi Giaime,

I am looking for a CCS-loaded cathode follower preamp (e.g. 12B4A, 6EM7 etc.). Could you share your circuit?

Thanks.

Regards,

T.C. MA
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Old 19th June 2006, 09:30 AM   #22
Giaime is offline Giaime  Italy
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Hello, you can find all schematics online on my site, in the "preamp" section.

http://www.giaime.altervista.org/
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Old 19th June 2006, 01:16 PM   #23
lndm is offline lndm  Australia
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Quote:
Originally posted by Giaime
I'm using a CCS-loaded cathode follower in my preamp, unbypassed. It works, so? You don't need to bypass the cathodes of SE output tubes if you use a CCS.
Perfect sense Giaime. A capacitor is a constant voltage device. It would only fight with a constant current source until one caved in.
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Old 19th June 2006, 01:20 PM   #24
Giaime is offline Giaime  Italy
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Notice that I was wrong when I said that, because I confused CCS under cathode followers (where load is in PARALLEL with CCS) and CCS under single ended output tubes (where load is in SERIES) with the CCS. In the second condition, the circuit won't work.
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Old 19th June 2006, 01:50 PM   #25
lndm is offline lndm  Australia
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I read in this thread about cathode loaded output stages, I thought you were talking about these. Thanks for setting me straight.

FWIW, tubecad.com has a series on them.
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