Technics amp problem
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On Jan 6, 12:43 pm, (GregS) wrote:
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I've got an older technics amp (no tuner) that gets crackly on both
channels after it runs about 30 minutes or so. Sounds fine when you
start it up. Switchs and pots have all been cleaned. Any
suggestions? I'm guessing power supply but not sure what it could
be. Do the big caps start leaking after they get hot?
Caps are not supposed to get real hot. They can leak and, or, go bad.
Are the crackles the same on both channels. How many caps are there.
Does the amp include a preamp, etc.
greg
Don't know that the caps specifically are getting unusually hot, the
whole unit gets warm after a while of course. Both channels and yes,
it has a pre-amp in it as well with source and tape selection switches
as well as a couple tone controls. No tuner. Have it hooked to a pc
running itunes and nothing else except speakers.
You think I should be looking at the preamp? I was suspecting the
power supply since it hit both channels but don't have a clue as to
what in the power supply would cause this symptom.
Often the speaker relay contacts develop intermittent connections on older
units. Try tapping on the speaker relay when the problem occurs and see if
that affects the problem.
Also try switching, turning and generally manipulating the various controls
and switches. One or more may be causing the trouble.
Mark Z.
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