It could be several things but Id call the factory first since it is still
in warranty.
Carl
KM1H
----- Original Message -----
From: "Jim Barber" <audioguy@q.com>
To: "Mansfield Aubrey" <n3bm@finnsfield.net>
Cc: <amps@contesting.com>
Sent: Sunday, September 30, 2012 8:04 PM
Subject: Re: [Amps] AL-80B
Aubrey,
This applies to the AL-80/SB1000, but may apply to the 80B as well.
If you pull the cover off, check to see if there's a power relay mounted
on a piece of metal that's screwed onto
the rear cabinet wall. If so, make sure the screw is tight and the bracket
is firmly attached to the cabinet
wall.
I put an SB-1000 on the shelf for years because I thought the transformer
was delaminating; turned out it was a loose
screw. Go Figure.
73,
Jim N7CXI
On 9/30/2012 3:38 PM, Mansfield Aubrey wrote:
My 5 week old AL-80B has developed a loud transformer hum when keyed.
It's very noticeable (and annoying), even with headphones on. Is this
normal? - Aubrey N3BM _______________________________________________
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