This is a group for home made guitar amps.
Latest Activity: Nov 25, 2022
Started by Tom Hoglund Nov 7, 2022. 0 Replies 1 Like
See my web page for more amps and details, but here are a few of the tribute amps I've built:…Continue
Started by BrianQ.. Last reply by BrianQ. May 28, 2021. 1 Reply 0 Likes
Started by BrianQ.. Last reply by BrianQ. Sep 27, 2020. 25 Replies 8 Likes
Reworked Version w/ upgraded Power switching:…Continue
Started by Henry S. Last reply by GARAGE HERMIT Aug 13, 2020. 4 Replies 2 Likes
I have not posted here in a million years -- been off in Google groups, but last night I had a great time when I surprised a good friend by giving him one of a pair of resonator CBGs I had built. The…Continue
How about making 2 of these in a cabinet with 2 speakers for a stereo amp like the old Crate amps back in the day?
Yeah the Ruby is based on the Lil' Gem amp and the Ruby can use a 4ohm or 8ohm speaker(4ohm sounds a bit louder, but it pushes the chip more). The big difference between the 2 amp circuits is the JFET filter in the input circuit. The Ruby shows a MPF102 JFET, but you can use a 2N5457 JFET instead. Just depends on which one you like better.
I also use a 3-way toggle switch on/off/on in the input circuit with 2 different value caps(.047 & .1) so I can get darker tones with guitar or play bass with the .1 cap. The off center just acts as a kill switch/no signal.
I haven't had email in a week so I missed this. When it comes to the 386 chip, I prefer the Ruby Amp because of the input filters and interactive volume and gain pots.
Then I got to playing around with another build and added a tone circuit. Then I added a second chip and bridged them for a 2watt amp that you could say is just a distortion box op-amp.
I've got a Tube amp in need of a re-cap and another that needs to be rebuilt and converted into a guitar/bass amp from a turntable amp, but I haven't stopped guitar projects long enough to do them yet. Hopefully I can start on them soon.
Anybody make any amps lately? Anybody build em from scratch?
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