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Info on building, modifying and repairing amplifiers. Show us your creations and share what's inside.
Members: 71
Latest Activity: Jun 24, 2020
Amplifiers
Discussion Forum
Let’s talk LM386... w/ Perfboard/ Stripboard Amp layouts
Started by BrianQ. Jun 21, 2020. 0 Replies 0 Likes
Here’s 2 articles I combined into a PDF. Smokey amp & Smokey amp head layouts in both Perfboard & Stripboard formats. Rock on, my good people!!!…Continue
Build Your Own Cordless Amp / Preamp-- Easily!
Started by Wayfinder. Last reply by Wayfinder Nov 7, 2019. 2 Replies 0 Likes
Well, relatively easily. It's like making a CBG, but simpler.Photo is at the end of this article. Ted asked me to re-post this here for the Amp group. Nicetameecha! :D CBG players often wish…Continue
Mini Amp help
Started by Mark Duncan. Last reply by Mark Duncan Feb 10, 2016. 15 Replies 0 Likes
I'm planning to make some mini amps out of old tins and I've been looking at kits based around the LM386 chip. I don't want to buy them from the US or China (I'm in the UK) as I'll have to wait a…Continue
Comment Wall
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Comment by BrianQ. on November 7, 2019 at 11:36am
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Comment by Wayfinder on October 8, 2015 at 9:26am
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Resistor Question:
I have a 4ohm speaker and an 8 ohm amp. Planning on adding a 4ohm resistor to the speaker to equalize. Is it best to put the resister on the red or black lead?
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Comment by jeff weins on November 23, 2014 at 11:57pm
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Honeytone Peavey Stack
The volume is moderated for the video, it goes surprisingly loud
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Comment by Ted Crocker on March 19, 2014 at 9:45pm
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Awesome find Sam, but I can't tell you what you have. Some thoughts:
It doesn't look like there is a fuse - I would plug it into a power strip with a circuit breaker to isolate it from your home wiring to avoid it blowing the mains circuit.
It appears that the 4 black 'knobs' (lugs) are your input and outputs. If it works, you can easily replace them with two ¼" jacks.
My guess is that the two lugs by the Leviton switch are the input.
My guess is that on the output side, the outside lug is positive - because the capacitors bleed to ground
I would try it!
Good luck!!
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Comment by Wichita Sam on March 19, 2014 at 10:47am
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OK...so I found this vintage amp of some kind at a garage sale.... I am clueless, but would like to use is as a low wattage head for a prim head/cabinet unit.
Can someone tell me 1) what do I have? 2) is it worth replacing the tube? 3) will I die if I plug it in? The cord looks like vintage lamp cord in good repair.
I don't mind a little learn by doing, but just don't want to screw things up right off the start... any and all help appreciated.
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New harp rig - TUBES!
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Comment by bairfoot cajun on March 16, 2014 at 11:56pm
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hello,thought i might ought to be here,getting an amp collection now so i will get a few pics up to show some of them.
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Comment by Joe Thomas on January 8, 2013 at 12:53am
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A real nasty one I'm redoing.. A Sound Research G-2000. Basically a Fender Showman clone. Damn thing is brutal, borrowed a friend's 4-12 cab and if you turn it past 4 it feels like you are getting kicked in the chest.
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Comment by Mark Ayers on May 20, 2011 at 1:47am
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Sam
You did good on this amp set up. I will go get one from HF and then locate a speaker from some where. Really sounds great, both the amp and the 4 string
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Here's a youtube of the CBAmp based on the innards of a $ 6.99 Harbor Freight "Mini Handheld Megaphone"... Added a 4 ohm speaker salvaged from a Rocktron practice amp and a jack soldered to the leads that originally went to the megaphone's mic element.
For what it is, I think it sounds pretty good. Makes a nice companion to the CBG in the vid. This was recorded on my laptop using the onboard mic and camera. No pedals, effects or processing to enhance the sound. Pretty good for $ 7... eh?
the best,
Wichita Sam
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