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A friend of mine picked up a pair of old Kalamazoo Model 1 and Model II amps. Each of them had asbestos strips on the inside edges of the combo. I stapled...
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With the transmitter turned on, look for a high frequency carrier waveform from the antenna. Don't overlook the basics either - faulty on-off switch (if...
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Need help finding audio transformer for PDB DI Box
Rare as it is, the transformer in a customer's ART Passive Direct Box failed. The primary side is 1.6K, secondary is 220 Ohms. I inject a signal in the primary...
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I had the Bassman amp head that appeared in a couple of postings here. Got mine around 2005?, knowing what I was getting. I'm a tech so I was through the...
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CPU Reset is something to try for sure. Even when I was trying to bring a pedal or amp (with computer chip) back to life that I wasn't totally familiar with,...
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This does my heart good to see so many people using Merry Christmas. I cringe when folks refuse to use it and only say Happy Holiday.
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Healthy caps are NEVER warm. In a Champ, I've seen a white electrolytic baked 'to its death' from the heat of the cathode resistor that it was too close to....
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I'm an electronics tech and recognized this as a switch mode PS. I've only seen one - in a bass amp. I admit I can't explain how it works any better than...
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Be sure to wire the battery clip with correct polarity. The positive battery lead goes to ground....
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Chuck H: When I overhauled a B-15 a while back, Fliptops was a major resource for parts and I had no trouble with them at all.
For this estimate they...
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Ampeg V4B overhaul estimate
It's been a few years since I overhauled any amps for myself or anyone else. A SF Super Reverb around 2015 may have been the last one. I've been fixing...
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messy schematic with that writing over it. momentarily, put a jumper across that fuse/resistor or whatever it is that is labeled FS1 or PS1 polyswitch. I'll...Last edited by Marshtech; 06-15-2021, 04:31 PM.
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This suggestion is highly un-technical for the most part, but try this - completely disconnect the entire reverb tank and run a jumper from R103 to R108 and...
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