RE: Graphs

Tube DIY Asylum

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In Reply to: RE: Graphs posted by Tre' on December 16, 2012 at 08:16:02:

Hi Tre,

The 100k was an arbitrary figure to suit the purpose of the question.

My amplifiers use either/or a combination of direct and transformer coupling, so there is no RC in practice which includes the cathode circuits.

I remember reading something about tubes liking a low AC impedance from grid WRT ground, probably a grid choke thread. The last RC coupled stage that I built used 0.1uF teflon cap with 180k, DC was quite some better. All to say that I cant comment with any actual experience with varying values of resistive grid to ground resistors.

What started me thinking about this is an idea for a CCS hybrid mu follower parafeed to an autoformer for a DAC output stage and the inductive reactance of the unit requires a large capacitor.

I figured to simply scale the results from the 100k question to suit, and use that as a starting point.

With Thanks,
Shane

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Follow Ups Full Thread

Topic - Phase Shift WRT RC coupling and LF calcs. - shane. 04:02:05 12/15/12 (5)

Graphs - Triode_Kingdom 11:22:55 12/15/12 (3)

RE: Graphs - shane. 05:33:30 12/16/12 (2)

RE: Graphs - Tre' 08:16:02 12/16/12 (1)

RE: Graphs - shane. 12/16/1208:58:13 12/16/12 (0)

RE: Phase Shift WRT RC coupling and LF calcs. - Tre' 09:30:12 12/15/12 (0)

Follow Ups

RE: Graphs - shane. 12/16/1208:58:13 12/16/12 (0)

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