Crude ideas...Driving a mini boost with a Mosfet stage...help learning occur!

[Toney]

   I love ROG's peppermill. It's great.
Reading through Geofx frustrating my brain, trying to comprehend Mu amps....(learn, damn you brain,...absorb!)
I was messing with the mini booster circuit and then ...what if.... what if I used a Mosfet as in the peppermill, to drive the mini booster into distortion. Wonder how that would sound.

Ok no great genius shakes there, but I'd love to get it up and functional, then mess with tone shaping.

Now the crude bit...below I have simply cut and spliced the Mosfet from the ROG peppermill schem to 'spank'  the minibooster.


Help me learn here... how can I idealize this set up, make it functional and stable as a kicking off point to a decent OD/distortion.
Can I simply go straight in to the mini boosters lower Jfet from the 250k Gain pot? I cut out the input caps and Rs from the mini booster...
told you it was crude!

Here are the Peppermill and Mini booster schems in their natural form, from ROG and GGG respectively.

[MartyMart]

I did a similar thing with the "Hamptone" preamp driving a sort of "Fetzer valve" stage.
I may draw up that schem as it works beautifully well

I would think that the Minibooster into peppermill would work better >??
Boosts into OD's seem to work in general that way, what do you think ?
You could make each side switchable, so you could have just pure boost/Pepper ...

MM.

[brett]

Hi.
You certainly have some interesting things happening here.

Not sure how it would sound, but with that top JFET "dynamically" loading the bottom JFET, the gain should be several dB up.  Personally, I think JFETs sound sweet when a single device is working very hard (as in a Stratoblaster).  

In this case, you are getting the gain from several devices, so you might not get much distortion until the signal runs into the limits set by the supply rails.  After that - who knows?  Build it, crank it and find out!