[TenTec] Station power supply??

[Mike Hyder -N4NT-]

I made inquiry of Astron some eleven years ago because my RS-35 did not seem 
to be designed to work in an RF environment. The regulator circuitry varied 
the supply's output voltage with RF in my shack. The exchange is below. I 
did as Astron suggested and it cured the trouble. A local repeater owner 
told me that the Astrons were succeptible to voltage spikes from lightning 
in the county since the spike can travel unimpeded into the regulator 
circuitry through the negative lead. Performing the modification recommended 
by Astron greatly reduced their failure rate to zero.

(I sure hope this isn't in the ARRL Handbook)

73, Mike N4NT

----- Original Message ----- 
From: "Mike Hyder -N4NT-" <Mike_N4NT at charter.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, September 22, 2011 07:23
Subject: Re: [TenTec] Model 963 questions


> There have been troubles reported in the past with the Astron RS-35 due to
> RF energy entering the unit. I do not know if newer models have eliminated
> that but here's what they said ten years ago.
>
> 73 Mike N4NT
>
> ----- Original Message -----
> From: "ASTRON" <sales at astroncorp.com>
> To: "Mike Hyder" <N4NT at chartertn.net>
> Sent: Tuesday, November 20, 2001 6:06 PM
> Subject: Re: RS-35 in an RF environment
>
> MIKE.
>
> 1ST CHECK YOUR AC OUTLET GROUND IT MUST HAVE GOOD CONNECTION
>
> 2ND. MEASURE FROM THE -13.8V TERMINAL TO CHASSIS, IF NO DIRECT CONNECTION,
> RUN A PIECE OF WIRE FROM -13.8V TERMINAL TO CHASSIS.
>
> JANE
> ___________________________________________________________
>
> ----- Original Message -----
> From: Mike Hyder <N4NT at chartertn.net
> To: <eastron at astroncorp.com
> Sent: Tuesday, November 13, 2001 7:56 AM
> Subject: RS-35 in an RF environment
>
> Several people have advised me that Astron had a service bulletin for the
> Astron RS-35 (and possibly other models) which advised to strap the 
> negative
> post of the supply to the cabinet to reduce or eliminate problems caused
> when RF energy affects the supply's regulation.  This is in particular a
> frequent problem in the amateur radio service.
>
> Could you confirm such bulletin and either email it to me or point me to 
> the
> URL that will allow me to view it, please?
>
> Many thanks,
> Mike Hyder
>
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