[TenTec] Ten Tec Power Supplies

[Mike Hyder -N4NT-]

I believe the 252/262 models were the last without OVP.  You were wise to 
avoid using the older supply with no OVP protection.  With an older supply, 
look inside for a small circuit board which connects directly to the rear 
panel output socket's positive lead - if present, the OVP is installed.

Those shown at  http://www.qsl.net/tentec/ttps.htm  listed as the following: 
255, 260, 280, 936, 960, 961 & 962, and any current model 20+ amp Ten-Tec 
supply are safe.

73, Mike N4NT

----- Original Message ----- 
From: "Hulett, Russell" <rhulett1 at consolidated.net>
To: <tentec at contesting.com>
Sent: Friday, September 03, 2010 7:53 AM
Subject: [TenTec] Ten Tec Power Supplies


>I owned a TT PS for awhile, but it had a single pass transistor without the 
>OVP module ( crowbar ), so fear of putting 25 VDC into the rig from a 
>30-year old transistor failing caused me to never use the thing.  For 
>awhile I contemplated building a crowbar, but ended up selling the PS, now 
>use a switching supply with meters and just keep the current levels below 
>the danger point.
>
> When did Ten-Tec start incorporating OVP ( and/or dual pass 
> transistors )into their power supplies?  Which models are "safe" from the 
> destroying the powered device because of single-component failure?  So 
> far, I've avoided buying any TT power supplies because am never sure which 
> of them are "safe".
>
> 73, Curt KB5JO