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Re: [TenTec] Need advice about OVP for 262G

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Need advice about OVP for 262G
From: "Mike Hyder -N4NT-" <Mike_N4NT@embarqmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 1 Apr 2009 09:34:42 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Well, let's see....  Assuming your post is not an April Fool's Day joke, 
imagine your sending ~25VDC into the 540.  How long do you suspect you have 
before the rig is damaged.  Others have tried your experiment and were 
disappointed with the result.  You might want to hook it all up and short 
the 262G's pass transistor to save the time of waiting for a naturally 
occurring failure.  Please advise the group of your test results.

73, Mike N4NT

----- Original Message ----- 
From: "Hulett, Russell" <rhulett1@consolidated.net>
To: <tentec@contesting.com>
Sent: Wednesday, April 01, 2009 9:22 AM
Subject: Re: [TenTec] Need advice about OVP for 262G

> Evidently several years ago, someone suggested installing a 1.5KE15A 
> transient suppression diode with a fuse at the PS output.  This seems like 
> a simple solution to me compared to SCRs, added circuits etc.  One 
> question, since these diodes will clamp, thus protecting the load ( my 
> Triton IV ) why won't the 4A slow blow on the transformer input do the 
> job.
> I'm thinking of building the zener and an in-line fuseholder into the 
> cable between the 262G and the 540.  That's to avoid modifying either the 
> power supply or the radio.  Wonder if anyone else has used that approach, 
> and whether I'm missing something crucial.
> 73, Curt KB5JO

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