First power up on 124 build. Bias circuit resistor fried.

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Charlie Wilson
Posts: 1140
Joined: Thu Jan 23, 2014 7:32 pm

Re: First power up on 124 build. Bias circuit resistor fried.

Post by Charlie Wilson »

martin manning wrote:Are you sure that there are no wire ends touching the chassis behind the rectifier boards? You should have G10 backer boards between the PCB's and the chassis.
Hello Fire Marshall Bob here. Please at least put a backing board behind your rectifier board. You can do some serious damage to yourself or your amp if that thing shorts.
CW
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mcshaner2k
Posts: 45
Joined: Sun Dec 28, 2014 12:33 pm

Re: First power up on 124 build. Bias circuit resistor fried.

Post by mcshaner2k »

Thank you Fire Marshall Bob for pointing that out!

I do have the backing boards which I will be installing!
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mcshaner2k
Posts: 45
Joined: Sun Dec 28, 2014 12:33 pm

Re: First power up on 124 build. Bias circuit resistor fried.

Post by mcshaner2k »

Yup.. I killed one or both caps :(

I'm only getting about 130v dc on B+1, I have 450v going in.

My fluke doesn't have capacitence so I can't test them. I really need to upgrade this meter.
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