Buff'n Blend report

[MartyB]

Modulation devices seem to work fine, but anything with boost to it (e.g. Rangemaster, Tonebender, Tubescreamer, Orange Squeezer) either seriously heats up, or just fries the j-fet.  Is that a symptom that anybody recognizes? I wonder if a simple design with a dual-gang pot wired as two variable resistors (one working forward, the other backward, if you see what I mean) could be used with a simple boost out , to achieve the same thing as a blend function?

[Paul Marossy]

Perhaps the output voltage from circuits that really boost the signal going to the JFET exceeds its maximum input voltage rating?

Maybe you could incorporate a level control at the input of the Buff n' Blend circuit to bleed off some of the signal to ground so it doesn't overwhelm the JFET when used with high volume circuits.

The dual-ganged pot idea would probably work, but you may need two different values of pots to make it work like you would expect it to. One advantage of the B&B circuit is that acts as a buffer for the effect that it is used with. But, on the other hand, this can be a disadvantage if that effect doesn't like a buffer at its input.  

Just some thoughts...

[MartyB]

Thanks for the thoughts Paul!