This is a group for home made guitar amps.
Tribute amps I've built
See my web page for more amps and details, but here are a few of the tribute amps I've built:
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Matching Speakers to LM386
After lots of searching and reading and in an effort to avoid unleashing the wretched blue smoke, I would like to ask if I have this straight. IF I have two 2.5 watt 3.2 Ohm boombox speakers and if the LM386 has a 4 Ohm to 8 Ohm range, can I assume if I hook them up daisy-chain style that it will make 6.2 Ohms making them OK for use? can resistors be used adjust this? Thanks in advance for any help.
Read more…Let’s talk LM386... w/ Perfboard/ Stripboard Amp layouts PDF
Here’s 2 articles on the same circuit I merged into a PDF. Rock on, my good people... Let%E2%80%99s%20talk%20LM386...1a.pdf The Stripboard layout can also be built on a Breadboard.
Read more…Suggestions wanted for easy amp build
Hey all. I have been watching this speaker for awhile now. They are American Vintage model G8Cs, 20 watt, 8 ohm speakers. They are on sale for about 20% off and are supposed to sound bluesy. I listened to a a few sound clips for it and so I bought two. I have yet to build an amp, but I have been studying various schematics, teaching myself all this stuff with the help of several very patient members here. Thank you again. I have an enclosure mostly built to house a five inch 5 watt speaker I…
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Comments
BrianQ, made this recently,
just a simple lm386, used a 12" fane speaker and an old draw as a cab, only control is a gain pot,
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?
Being shut in is a perfect time to build an amp!
Pretty simple, straightforward LM386 based amp, all 9 volt versions of the opamp will work, try the 12 volt version for more headroom & clarity, but beware the 9 volt version will doesn’t like 12 volts....... will also drive a speaker cab just like the Smokey! Enjoy :)
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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