I'm building a little single channel/1 input amp like this: input --> 1/2 triode --> t/b tone stack --> volume --> 1/2 triode --> PI --> power. What I'm wondering is:
(1) since there are no channels to isolate, do I need a "mixer" or grid stopper going into the PI? I just stuck a 220K (Fender value) there now, but does it really need to be there? What are the effects of removing it altogether, or raising it to 'Marshall' values i.e 270K or 470K?
(2) is the 'coupling cap' off the second stage plate essentially the PI input cap as well? It seems kind of silly to set up, say, a .022 coupling cap into a .01 PI input cap - wouldn't one just use the .01 cap right off the 2nd stage triode plate and into the PI (or through the mixer/grid stopper into the PI)?
I'm sure these are remedial questions, but any info much appreciated!
(1) since there are no channels to isolate, do I need a "mixer" or grid stopper going into the PI? I just stuck a 220K (Fender value) there now, but does it really need to be there? What are the effects of removing it altogether, or raising it to 'Marshall' values i.e 270K or 470K?
(2) is the 'coupling cap' off the second stage plate essentially the PI input cap as well? It seems kind of silly to set up, say, a .022 coupling cap into a .01 PI input cap - wouldn't one just use the .01 cap right off the 2nd stage triode plate and into the PI (or through the mixer/grid stopper into the PI)?
I'm sure these are remedial questions, but any info much appreciated!
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