Quote:

First off: Thanks so much for your help!
I am in the process of testing what you guys suggested. Of course today everything works fine, I`m very sure though, tomorrow when I`ll be teaching it`ll appear again;-))

I thought about the wires too, since they are the same age the old amp was (hmm, I moved in in 1990 - daaamn;-)) But so are the speakers...

But to exclude the Poti theory I will plug the headphones into the amps the next time it appears again. If the crackle ain`t on the headphones it can`t be the volume poti.

I`ll let you know my testing results.

Sandra



A very sensible test procedure, Sandra - Isolation of a problem like that is how to find out where the problem is occurring.

You might also try rotating the Volume knob a wee bit as well, see if the crackling is connected to that function or not.

Record/Source switches on HiFi preamps and receivers are also notorious for becoming dry and doing the same thing, channel dropouts, scratchiness, etc. So when the problem happens again, try moving the Record/Source switch(s) back and forth a few times to mechanically clean their contacts. ALL sound must pass thru these switches.

As for the amp being new and doing the same thing, this is often a function of the environment that the device is living in. Dry air from forced air heating, dust in the air, forced air heating/cooling with inadequate filtering or filters in need of cleaning or changing, tobacco smoke, such things in the environment can cause the switches and controls to yield these kind of problems sooner than expected.


--Mac

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