In Reply to: Re: the "COMPACT" ... posted by Scholl on April 10, 2004 at 07:31:11:
Hey-Hey!!!,
I have seen this arguement, re. the cathode resistance increasing output z. for a resistor it is a closed form sol'n. If the CCS is near infinite z then output z would also be ridiculous. This is not the case. I suspect that the contribution to the output z is mostly the input z of the other cathode. WHich would yeild an output z for the circuit much more in line with what would be measured. As far as measurements go, the freuency rsponse of one of these driving another triode( read: Miller ), the output z is in line with a single grounded cathode with small unbypassed resistance.
regards,
Douglas
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Follow Ups
- CCS and common cathode - Sector-7G 09:38:45 04/10/04 (16)
- interesting - Scholl 17:31:20 04/10/04 (15)
- Re: interesting - Paul Barker 01:47:40 04/12/04 (14)
- Re: interesting - Scholl 04:29:47 04/12/04 (13)
- Re: interesting - Henry Pasternack 19:41:35 04/12/04 (10)
- Re: interesting - Scholl 07:12:11 04/13/04 (9)
- Re: interesting - Henry Pasternack 11:20:59 04/13/04 (8)
- Re: interesting - MQracing 14:15:49 04/13/04 (7)
- Re: interesting - Henry Pasternack 16:11:56 04/13/04 (3)
- Re: interesting - MQracing 18:04:41 04/13/04 (2)
- Re: interesting - Henry Pasternack 20:37:06 04/13/04 (1)
- Re: interesting - arend-jan 00:42:18 04/14/04 (0)
- Paul, please correct me if I'm wrong... - Scholl 14:46:07 04/13/04 (2)
- Re: Paul, please correct me if I'm wrong... - MQracing 15:27:04 04/13/04 (1)
- Some preliminary tests - Scholl 08:01:58 04/15/04 (0)
- Re: interesting - Paul Barker 10:51:28 04/12/04 (0)
- Is this even a true diff amps? - Allen Wright 10:13:59 04/12/04 (0)