Steve and all:
Well, I tried transmitting on various power levels, including 5 watts, and
the hum was still there, although it was somewhat less noticeable on 5
watts. I also tried farther separating the power supply from the radio, and
plugging the power supply into another outlet, but the hum still persisted.
Again, the hum is not unbearable--it's just noticeable if you listen closely
when the rig is keyed.
I'm starting to conclude that this is all normal for this type of power
supply. So, I tried the ultimate "low tech" solution of them all; I put
the supply on a computer mouse pad on my ham desk, and the noise almost
became unnoticeable. So, I think I'm just going to leave it that way for
now.
If the supply or radio ran hot, I'd re-think my strategy, but so far, things
run very very cool.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, December 26, 2007 10:31 PM
Subject: Re: using TS480 with 35-amp Samlex switching power supply
> Tom,
>
> I don't have one of these, so can't comment on if it's normal or not. If
> it's not normal for this supply, perhaps you are getting some RF into it
> through the ac line cord. If you feel like playing, try reducing power
> and
> see what happens, try seperating the rig and supply as far as possible,
> or
> perhaps a different outlet to see what happens.
>
>
> Or maybe someone will tellyou it is normal for this supply and you can
> just
> enjoy your new toys.
>
> 73, Steve
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