HELP ON SB401 HUM

[Mark Graalman WB8JKR]

  I don't think you have a problem at all. Don't worry
about it.

Mark  WB8JKR


On Fri, 11 Jul 2003 23:58:29 EDT Dan Pividal N4VET <OTAKEBI at AOL.COM>
writes:
> I have an SB401 SB301 combo.
> When I key the mike I can hear a hum when I put my ear up to the
> cabinet over
> the transformer.
> I was told by a fellow HAM that he could hear a hum when I keyed my
> mike.
> Another station I talk to all the time told me he also noticed a
> hum.
> Both of these stations are about 2 miles from my house and both told
> me that
> since I was hitting them at 20 over and a station further away would
> probably
> not hear the hum.
> I do not see the hum on my scope when I key but I do hear a hum on
> keydown on
> my Kenwood with its antenna disconnected.
> My meter tells me that the HV is 800 when I transmit it drops to
> about 750
> CW. This seems to be right.
> Has anyone had this problem?
> Any help from anyone as to how to resolve?
> Is this common problem and if so any mods?
> Thanks,
> Dan N4VET
>
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