RE: direct coupling between driver and final

Posted by RC Daniel (A) on April 19, 2009 at 02:11:28

In Reply to: direct coupling between driver and final posted by GTCharlie on April 17, 2009 at 17:23:42:

Per Eddie Vaughn (whom I hightly respect, tho I am not blindly loyal to):

Difficult to bias precisely and keep biased
Sometimes unstable
Danger of thermal bias runaway
Slower power stage rise time
Greater likelihood of RFI pickup
Fewer usable tube choices
Inefficient due to much greater heat wasted in cathode resistor
Increased heat degrades in-chassis capacitors
Much higher B+ voltage required

Again, most these are able to be addressed, tho some are not with many common tube choices. That said, I am seriously considering a direct-coupled amp as my first scratch build.

Cheers
Raymond
"As long as we have any intention to be right... we should be wary. So long as words have the slightest ego attachment, they are dishonest."
Charlotte Joko Beck

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Follow Ups Full Thread

Topic - What "kind" of sound should one expect from the Interstage Mono Blocks? - Frihed89 00:04:45 04/08/09 (13)

RE: What "kind" of sound should one expect from the Interstage Mono Blocks? - DRCope 07:20:02 04/10/09 (0)

RE: What "kind" of sound should one expect from the Interstage Mono Blocks? - AudioNoteKits 07:32:01 04/08/09 (11)

Thanks. I am hoping to hear from some other buyers. - Frihed89 09:46:22 04/08/09 (10)

RE: Thanks. I am hoping to hear from some other buyers. - fwiw 12:15:05 04/08/09 (9)

I have a reply that this amp sounds more like a SS amp than and SET. Any comments? - Frihed89 23:47:51 04/08/09 (8)

RE: I have a reply that this amp sounds more like a SS amp than and SET. Any comments? - Rune 03:20:15 04/09/09 (7)

coupling : cap vs transformer - GTCharlie 01:11:25 04/13/09 (4)

RE: coupling : cap vs transformer - RC Daniel 03:28:41 04/16/09 (3)

direct coupling between driver and final - GTCharlie 17:23:42 04/17/09 (2)

RE: direct coupling between driver and final - RC Daniel 02:11:28 04/19/09 (1)

RE: direct coupling between driver and final - GTCharlie 18:25:04 04/19/09 (0)

Thanks NT - Frihed89 12:02:40 04/09/09 (1)

Rune, that's an amp I want to hear! The sound I get is - DougE 15:50:02 04/09/09 (0)

Follow Ups

RE: direct coupling between driver and final - RC Daniel 02:11:28 04/19/09 (1)

RE: direct coupling between driver and final - GTCharlie 18:25:04 04/19/09 (0)

RE: direct coupling between driver and final

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