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Quote from: Miyagi_83 on May 29, 2024, 09:13:26 AMUpdate
So, I have been tweaking the circuit for the past couple of days and I think I've got it where I like it. Actually, there are a few versions that I'm fond of, so I'm going to make it a switchable two or three-channel preamp. Honestly, this design has enormous potential, afaic. I haven't tried it on 18V yet. That's still on my to-do list.
Now I'm going to need a nice clean channel to pair with it. Any suggestions are welcome.
QuoteIs it OK to post a schematic with my changes? On his site, Joe Davisson put the 'do not copy / all rights reserved' clause, so I wouldn't like to infringe his copyrights, annoy him or anything like that, hence my question.
Quote from: joecool85 on May 27, 2024, 08:56:13 PMFor those looking for the link to the schematic: https://www.diystompboxes.com/analogalchemy/sch/vulcan.html
I'm curious what the diodes are for between the stages though. Not sure I've seen that before.
Quote from: g1 on May 18, 2024, 02:25:27 PMYou need a power transformer that puts out 60V center-tapped (30-0-30) good for at least 120VA. If it's not the exact peavey unit, you will have to drill and cut to make it physically fit the chassis.Im looking at the schematic... looks like it says 42.8V+, 42.8- coming out of the transformer after the diodes. Then goes through a pair of resistors down to 15V+, 15V-. Dont I need a transformer that is 42.8-0-42.8? Im not good with transformers so bear with me..Thanks.