I haven't tried this but want to "compare" noises: recently purchased a
Centurion and the relay seems to buzz a bit as it switches...I too am
wondering if it is how it is mounted mechanically. It is free to move a bit
and perhaps I set it in the wrong spot!
----- Original Message -----
From: "Ken Brown" <ken.d.brown@hawaiiantel.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, December 07, 2007 4:11 PM
Subject: [TenTec] Ten-Tec amplifier vacuum relay noise
>I have a Titan 425 and a Hercules II 420 amplifier. The vacuum relays in
> the two amplifiers appear to be the same model. The vacuum relay in the
> 425 makes much more noise. I know it uses a higher voltage to actuate it
> that the 420 does, 20 V versus 13 V. That may be part of the difference
> in noise. I am wondering if differences in the mounting of the relays
> and the stiffness of the wires connected to the relay is also an
> important factor in the amount of noise radiated (acoustically) from the
> relay. I am considering replacing the grommets that the relay board is
> mounted with, and adding short lengths or braid in the connections to
> the relay (not stiffened by being totally soaked full of solder) to help
> isolate the relay vibration from the rest of the chassis.
>
> Anyone out there tried any of this already? I'd be interested to hear
> about your successes and/or failures.
>
> DE N6KB
>
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