Hissing changes with input

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phase

Member
2004-10-04 11:59 pm
So I am getting a hissing that follows the inputs; as the inputs are switched, but cannot play both channels without one hissing, or occasionally silent if without a connected input.
The amp is an SAE2300, that I was thinking about recapping soon.I have a scematic.
The cables are very sensitive to handling while playing as well.

Any guesses as to what would this could be?
 

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phase

Member
2004-10-04 11:59 pm
Thanks rayma, I was just looking at that, when I thought to check something else.
Well it happened to be that there was 1.75VDC coming out of the laptop headphone jack that I was using to test. Funny how its been just fine for the past five years, and just before I switched amps today.
When working with equipment that is nearly 40 years old, you want to suspect that and not the shiny laptop...
Nanook, I happened to get a bit of that here as well, must be going around...
The amp is playing now, and pretty nicely too I must say, better recap it soon before something goes off in a bad way.
 
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phase

Member
2004-10-04 11:59 pm
I suppose so, have a lot of good software on it too. I am going to have to get my DAC project going so I can use the usb output at least.
Am just very glad this didnt happen during one of the burn in sessions over the past month with another amp!
 
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