Thanks, Al. Yeah, it's a pretty simple circuit. I recalled discussion some
months ago regarding the kit that TT offered as being compact and easily fit
into the 252. So thought it at least worth trying. I guess I'm surprised that
TT didn't design in o/v protection as well as o/c protection. The 225 supply
for my recently acquired Argosy has both. Wasn't the Argosy a contemporary
cousin of the Triton?
73,
Allen
----- Original Message -----
From: Al Gulseth<mailto:wb5jnc@centurytel.net>
To: tentec@contesting.com<mailto:tentec@contesting.com>
Cc: A R<mailto:raf_3@msn.com>
Sent: Sunday, August 02, 2015 4:35 PM
Subject: Re: [TenTec] Crowbar kit for 252/262 power supply
Allen,
The OVP is not "rocket science" so to speak - it's just a zener diode, a
heavy-duty SCR of the proper rating, a fuse, and a few passive components. It
should be fairly easy to build one on a breadboard or in a small external
enclosure along the lines of the 1150 (if I remember the model # correctly.)
There may be a scan of the crowbar manual/schematic floating around
somewhere, or otherwise you could clone the crowbar circuit from the Astron
RS-20 series. (It's a variant of the circuit TT used.)
73, Al
On Sun August 2 2015 6:09:25 pm A R wrote:
> Does anyone have a TT overvoltage crowbar kit for a 252/262 PS that they
> never got around to installing? Haven't checked for availability from TT,
> but have to believe they're LONG ago obsoleted and not available. If you've
> got one, please reply off list.
>
>
>
> TNX es 73,
>
> Allen--W7GIF
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