How To Get 'Dirt' from Clean Channel?

[Structo]

Structo, interesting. i have a low-plate 50W D'Lite, and the clean channel won't break up until I pretty much crank it. By that time, the clean volume overwhelms the OD volume.

Well maybe I am misunderstanding what breakup is with this amp.

I just know that it gets a bit distorted on the clean channel if I have the master down with the preamp up.
Maybe that is still just preamp distortion.

I rarely ever turn it up that loud because the room is small.

I know I like how this amp sounds though.
I generally like to keep the clean channel clean and the OD channel about noon on the Drive and balance it with the level control.

[talbany]

The PI is one area that still holds mysteries for me and I am very interested if at low volume it makes a difference in tone

This is generally a problem when someone posts a more technical view of a circuit, network, componet,etc.. It's just that ...A technical view as how I understand it.. How this actually translates to the real world use and tone is based on your own study experience.. Another words it doesn't lend itself to terms like low volume, or pushed hard or other variables tube choice, resistor types used.. I hope I don't come off as a smart ass here as this is not my intent..It was merely trying to illustrate how one is theoretically more prone to introduce more harmonic content than the other
As it relates to my ears.... I don't feel or hear the anomalies of a clipping PI while playing in a room with the wife asleep upstairs..It will however be there at a gig with a real drummer and definitely with the OD on and nice hot set of pickups..
The decreased amount of NFB in the BM circuit will effect the overall tone at virtually any level...Changing the Cathode resistor and tail changes load line and most certainly frequency response as well just like any other stage.. Here is a good experiment put a variable resistor in the cathode of the PI..Start at 1k and work your way down.... What my ears tell me is brighter and less headroom...At any volume level..Anyone hear different?.. Like I said just a different angle..

As for the tone stacks that's a whole other world...

I often thought what would an amp set up like a BM but no HRM..Set up the OD like 124#...Keep the BM PI tonestack...How about doing that with MM transformers 700v EL-34's Hmmmm!!

Tony
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[CHIP]

Should the voltages on the plates of the BM PI be the same as the plates on a skyliner PI?,(which I understand should be around 290-300 v.)

[heisthl]

IIRC you have about 50 volts less on the PI plates when you covert to a BM style.

[CHIP]

Thanks Henry!