In Reply to: Innerstage vs R/C coupling. posted by Michael Samra on February 25, 2017 at 10:47:01:
Mikey,
Lets talk Class A1 triode amps, for high efficiency speakers.
Think about what the prior stage has to work into, and you can prioritize the three ways of coupling one tube stage to another :
WORST : Cap Couple, tube has to power a cap !!
LESS WORSE : Transformer Couple, not too bad at all
BEST - by FAR : Direct Couple, tube gets connected to next stage grid by a short length of high quality wire.
As far as transferring of the signal, the Direct Couple is many many times superior to ANY Cap Couple, in transferring and driving the next stage, in general terms.
Yes, there are engineering exceptions, but if you have a choice, ( for example, a two stage ONLY triode Class A1 amp ), it is hard to beat a DC !!
Jeff Medwin
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Follow Ups
- Three ways to couple...... - drlowmu 12:31:50 02/25/17 (17)
- I prefer a coupling cap to a cathode bypass cap - andy evans 07:53:29 02/27/17 (15)
- That is because people never DO a proper cathode bypass cap implementation - drlowmu 09:31:24 02/27/17 (14)
- We haven't AB'd the alternatives so frankly, who knows.... - andy evans 16:10:14 02/27/17 (13)
- RE: We haven't AB'd the alternatives so frankly, who knows.... - drlowmu 23:14:45 02/27/17 (12)
- That is your experience and opinion. - 91derlust 12:10:26 02/28/17 (11)
- RE: That is your experience and opinion. - drlowmu 16:33:27 02/28/17 (10)
- RE: That is your experience and opinion. - 91derlust 16:48:41 02/28/17 (9)
- let me tell you something... - PakProtector 09:09:26 03/01/17 (8)
- RE: let me tell you something... - TomWh 09:47:45 03/01/17 (7)
- you'll have to ask Him yourself...:) - PakProtector 05:48:15 03/03/17 (2)
- RE: you'll have to ask Him yourself...:) - vinnie2 14:27:44 03/04/17 (1)
- RE: you'll have to ask Him yourself...:) - PakProtector 17:29:35 03/04/17 (0)
- RE: let me tell you something... - megasat16 11:16:59 03/01/17 (0)
- RE: let me tell you something... - drlowmu 09:56:37 03/01/17 (2)
- RE: let me tell you something... - TomWh 12:20:59 03/01/17 (1)
- RE: let me tell you something... - drlowmu 12:46:28 03/01/17 (0)
- RE: Three ways to couple...... - mqracing 12:56:49 02/25/17 (0)