Heathkit AR1500 problem

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Heathkit AR1500 problem

Post by mr_ed01 on Thu Sep 26, 2013 10:10 am

My AR1500 will develop a low level 'buzz' in both right and left channels after being on for a while.  The buzz is not affected by any of the controls or input selection.  Swithcing it off then back on will eliminate the buzz for a while.  Any suggestions / ideas?

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Re: Heathkit AR1500 problem

Post by N7ZAL on Thu Sep 26, 2013 1:14 pm

A buzz, not a hum?
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Re: Heathkit AR1500 problem

Post by mr_ed01 on Thu Sep 26, 2013 3:04 pm

More of a buzz rather than the usual 120 Hz hum. Just loud enough to be annoying. Looking at the regulators in the 50V and +/- 12V supplies.

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