In Reply to: RE: Smeared? posted by Tre' on December 12, 2016 at 20:17:22:
It goes up but how significant it is depends on the rest of the system.
The preceding stage in my case has output impedance of about 47 ohms and I use a 470 ohm grid stopper. A paralleled 6SN7 has about 8pF of plate to grid capacitance and in the case of using a CCS, a mu of about 20, so about 168pF miller.
I say "about" because the two sections of a 6SN7 don't have the same input capacitance and even with a CCS the mu can vary tube to tube.
So yes it affects the FR but whether it makes a difference is up to the builder and the application.
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Follow Ups
- RE: Smeared? - kyle 06:31:45 12/13/16 (5)
- RE: Smeared? - Tre' 17:01:16 12/13/16 (4)
- RE: Smeared? - kyle 05:31:01 12/14/16 (3)
- try 'power' tubes - PakProtector 09:20:29 12/16/16 (2)
- RE: try 'power' tubes - kyle 13:39:19 12/16/16 (1)
- RE: try 'power' tubes - PakProtector 11:54:09 01/17/17 (0)