Hi all,
Dumb question from a noob; I have a couple of Adcom amps (545 and 535 II) that could only benefit from new electrolytic caps. What's the best way to drain down the caps? I've read about using a resistor, a bulb, etc. How exactly is this done? I know it can be dangerous, both to the gear and the person if you dont know what you are doing and do it wrong. And I dont think i'm that person to try it unsupervised. But my friend and local go to for electronics questions and repairs is out of town indefinitely. And I'd still like to know the proper procedure for doing it for myself. And I'm not totally inexperienced with electronics repair, just not formally trained. Any input would be welcome. Thanks!
Dumb question from a noob; I have a couple of Adcom amps (545 and 535 II) that could only benefit from new electrolytic caps. What's the best way to drain down the caps? I've read about using a resistor, a bulb, etc. How exactly is this done? I know it can be dangerous, both to the gear and the person if you dont know what you are doing and do it wrong. And I dont think i'm that person to try it unsupervised. But my friend and local go to for electronics questions and repairs is out of town indefinitely. And I'd still like to know the proper procedure for doing it for myself. And I'm not totally inexperienced with electronics repair, just not formally trained. Any input would be welcome. Thanks!
and what are some of the preferred brands?
what brand are the originals?
What is their diameter? You'll want to find caps that fit right in the clamps/brackets those amps use to hold them in place. What's the rail voltage in the 545?
The caps probably don't hold a charge for long after you turn the amp off. If they do, put a large, 2W or more resistor, to discharge them down to less than 1Vdc. Monitor the voltage across the cap with a DMM.
The caps probably don't hold a charge for long after you turn the amp off. If they do, put a large, 2W or more resistor, to discharge them down to less than 1Vdc. Monitor the voltage across the cap with a DMM.
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The originals are Adcom rebranded, 10,000uF/63V (x4). But I believe they are actually by Towa Electron Co. LTD. Because...uh...they actually also say Towa.
Digikey has epcos and vishay caps in those values. You can also replace those with higher rating such as 15000uf /80v. If you go this route just make sure you replace the bridge rectifiers with higher value.
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