Are you on 50 Hz or 60 Hz power? If you have a transformer designed for 60 Hz
running on 50 Hz, it may well buzz quite loudly, run hot, and have poor
regulation.
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
> On May 10, 2019, at 8:26 PM, Tack JE1CKA <je1cka@gmail.com> wrote:
>
> I had a very clean used ACOM1010(a 4CX800, 160-10m) amplifier yesterday with
> $500US. It runs fine but a following issue.
> A transformer is growling very badly.
> When the amp was keyed a transformer started to growl, and it was driven
> 50-60w input a roar became terrible.
> I checked the fix bolt of the transformer and found nothing wrong.
> How to fix this transformer growling.
> --
> Tack Kumagai, JE1CKA
>
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