Hiwatt ROG-type pedal

[tcobretti]

I've been working on the schematic for my Hiwatt pedal, and I can't figure out what to do with the (as drawn) right halves of tubes 3 and 4.  If you guys could advise me a little I'd much appreciate it.

http://www.drtube.com/schematics/hiwatt/hwpre1.gif

Will it work if I just plug jfets into these spots?  I'd have to set up some way to regulate the voltage going into the tube 3 jfet.

Tube 4 seems unnecessary and I was planning to omit it.  Smart or dumb?

I've got the parts together, so if I can get the schematic figured out I'll breadboard it this weekend.  Then, if I'm lucky, about wednesday I'll finally get the breadboard to make any sound at all.

[Johan]

the right half of V3 in the hiwatt schematic ( the one with only a 1M and a 220k resistor and no signal on the grid) is only used to provide a positive bias voltage for the phase inverter that follows. I see no reason to include that in a r.o.g. style emulator.  V4 ( far right ) is the phase inverter itself and I sugest you look at how r.o.g deals with them and do the same...

...just curious...wich of the two channels are you going to emulate?...Ive only plays through Hiwatts a few times and as I remembered, I liked the normal channel when playing low volume and using the master, but prefered the bright one when the poweramp started to sweat....

Johan

[tcobretti]

I was planning on the normal channel to start with.  I've heard that the bright channel was unusably bright.  I plan to breadboard both and see which is cooler.

Thanks very much for the advice, I'll check out ROG and see what they did with the phase inverter.