[Amps] ACOM1010 Xformer growling

[Bob Wilson, N6TV]

Hi Tack,

According to Page 6 of the ACOM 1010 User Manual
<http://www.acom-bg.com/sites/default/files/manuals/ACOM%201010%20Manual.pdf>:
"If your line voltage is not 240 V, you must contact your dealer for
instructions on how to change the voltage selector inside the amplifier."

Also on Page 17:  "Primary Power: 85-132 V/170-264 V ac (100, 110, 120,
200, 210, 220, 230 & 240 V nominal taps), +10% -15% tol.), 50-60 Hz, single
phase, 1200 VA."

Maybe the wrong tap is selected?

73,
Bob, N6TV

On Sun, May 12, 2019 at 9:26 AM Tack JE1CKA <je1cka at 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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