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previous: Lars I'm building one right now. I had s... -- 4/17/2000 10:04 AM

Re: Anybody built a Matchless Hotbox?

4/17/2000 1:55 PM
Eric H	Re: Anybody built a Matchless Hotbox? Lars, someone else told me the clean channel isn't too good. The cathode-bypass cap on the first-stage is pretty small, but making it larger may give tooo much bass for the overdrive section. The 180pf and 500pf caps at the clean volume could probably be reduced to reduce brightness --it probably needs a tone-stack there too. Maybe remove those two caps and the 220k resistor, and add a 2-band tone stack, this might cut too much gain from the clean channel, though. I'm not good at gain calculations. I can't be of much help with the oscillation. I assume you've tried some of the simple fixes: poking wires around with a wood stick, input leads near output, etc. -Eric

4/17/2000 1:55 PM

Eric H

Re: Anybody built a Matchless Hotbox?

Lars, someone else told me the clean channel isn't too good. The cathode-bypass cap on the first-stage is pretty small, but making it larger may give tooo much bass for the overdrive section. The 180pf and 500pf caps at the clean volume could probably be reduced to reduce brightness --it probably needs a tone-stack there too. Maybe remove those two caps and the 220k resistor, and add a 2-band tone stack, this might cut too much gain from the clean channel, though. I'm not good at gain calculations.
I can't be of much help with the oscillation.
I assume you've tried some of the simple fixes: poking wires around with a wood stick, input leads near output, etc.

-Eric

Replies:

Lars I lowerd the anod voltage from 245V... -- 4/18/2000 6:21 AM