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This is my first build so please be gentle. I can start the amp up and everything seems fine, but when I take it off standby it blows the fuse instantly. I have gone over my wiring over and over an I can't find anything wrong. Obviously something is.
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Just wondering if you could take some closer up pictures of all the power side wiring on the amp? Also, I am going to help at least by putting up a schematic, but please post any other versions if not correct. My one worry would be to make sure that rectifier circuit is wired up correctly. I think those pics of that area and some more info will help very much in this case.
Attached FilesWhen the going gets weird... The weird turn pro! -
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The schematic shows two fuses. Which one blows?
You really need a light bulb limiter. Do a search to find out how to build one. It simply puts an incandescent lamp in series with the mains input of the amp so save you from having to replace fuses so often.
Do you have a digital or analog volt ohm meter?WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personnel.
REMEMBER: Everybody knows that smokin' ain't allowed in school !Comment
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Attached FilesComment
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Well, that was nice.
What are you showing us?Comment
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I believe I was asked for more pics. Read the other posts.Originally posted by Jazz P Bass View PostComment
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There are 2 fuses, which one is blowing?Originally posted by Enzo
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Have you built the limiter lamp/dim bulb tester yet?
Without the amp powered up, you could check the resistance from point A to ground, B,C, and D, each to ground.
The resistance should rise slowly at each point, and you should not have any low resistance readings.Originally posted by Enzo
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I would suggest that you 'lift' the B+ connection where it exits the rectifier circuit.
If the fuse holds then you know that part of the circuit is sound.
Then do the tests that G-One recommends.Comment
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