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Re: [Amps] ACOM1010 Xformer growling

To: Tack JE1CKA <>
Subject: Re: [Amps] ACOM1010 Xformer growling
From: Kim Elmore <>
Date: Sun, 12 May 2019 12:30:43 -0500
List-post: <>
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 

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 <> 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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