treble peak>coupling cap or coupling cap>treble peak??

[sonofmickel]

On the "sean superdrive601" schematic there is a 470p/560k>100K>.0022 that runs off the Plate on the second gain stage. The "Naked" schem and the dated 083096 have a .002 coupling cap>500k volume(100p treble cap).

My question is what is happening theory wise when the order is reversed(like Marshall)?
Coupling>Peak vs Peak>Coupling?

I am going to try it and draw my own layman's conclusions.

[tubeswell]

On the "sean superdrive601" schematic there is a 470p/560k>100K>.0022 that runs off the Plate on the second gain stage. The "Naked" schem and the dated 083096 have a .002 coupling cap>500k volume(100p treble cap).

My question is what is happening theory wise when the order is reversed(like Marshall)?
Coupling>Peak vs Peak>Coupling?

I am going to try it and draw my own layman's conclusions.

Sean Superoverdrive schemtaic

[img727]http://i176.photobucket.com/albums/w197 ... ive601.jpg[/img]

560k||470pF is a hi-pass filter. In terms of AC load, the 560k is also in series with 100k and then 500kA||1M. So the 560k is part of an AC voltage divider which is attenuating the signal from V1a in that regard. The .0022uF is a coupling cap.

In the other schematic, the .002uF coping cap comes straight off the plate and the 500kA pot is the variable voltage divider which is bypassed by a 100pF bright cap that only works when the pot isn't at full CW rotation.

[sonofmickel]

Thanks tubeswell,
But what happens to the signal physically? Does using a coupling cap before a treble peaking circuit offer protection to the user? Does it provide a less-bass to the treble peaker than a treble peaker feeding a coupling cap? What signal actually has less bass being fed to the 500k volume pot? Is it just additive inverse, same either way? Does one pass less signal?

[sonofmickel]

OK, first test was to add in the 470p/470k treble peak after a .002 coupling cap from the second stage plate. = instant hot rod marshall, it lost most of the bottom chewieness and added too much treble to the signal. I might try a 250p/250k? Would the 250p/250k cut a little less lows and add just a little more zing? That will be my next test tomorrow, or maybe tonight.