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[TenTec] Model 260 PSU factory modifications

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: [TenTec] Model 260 PSU factory modifications
From: Steve Hunt <steve@karinya.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 14 Aug 2014 21:15:37 +0100
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
I recently bought a spare Model 260 PSU. Checking it out, on the regulator board I found a missing diode, and an extra diode, resistor and PNP transistor tacked at the rear of the PCB.

At first I thought the previous owner had made the changes, but I checked my other 260 and it's the same. The schematic in the manual does not reflect these changes.

I wonder if anyone knows the reason for the modifications, or if anyone has a later schematic that shows the changes?

Steve G3TXQ
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