WOPL 400 4-Fin Blew the -15v Pico Fuse

NeverSatisfied

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Play the Game, don’t be the Game
#21
Never noticed that but I will look for it next time it occurs.


I don't think so because it always stops the intermittent output when I turn it down, immediately. If thermo I'd think there would be a time delay until cooler.



But this is not a relay board tripping as it is not output off until I cycle it. It is intermittent output, like digital skipping, but goes away once I turn it down (volume on preamp)
Just a WAG here but have you ruled out that the preamp could be the problem?
 

Gibsonian

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#24
This prolly worthless data as speakers connected but got 1 milliamp dc offset both channels. Been hard to disconnect and tear apart when sounding this good!
 

J!m

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#25
I haven’t determined the arm resonance on the BL-91 because I’d rather play music too…

Maybe tonight. Probably not.

I do want to find it out so I can then fill the trough and see if the resonance changes with the damper active…
 

Gibsonian

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#27
Ok. Back to my problems. It appears that via phono input, amp doesn't cut out at elevated spls. I have my theory, but why would digital (in from dac) do this and phono not?
 

mlucitt

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#28
If you have a scope, put the output of the DAC on the scope and you will see signals in the region that you cannot hear. That may be the cause, because the amp is trying to amplify that bandwidth too, assuming there is no DC coming from the digital source. Easy to check that with a digital meter.
 
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