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[Yaesu] Quadra VP-1000 PSU repair procedure

To: "'Yaesu Mailman Reflector'" <yaesu@mailman.qth.net>
Subject: [Yaesu] Quadra VP-1000 PSU repair procedure
From: "Adam Farson" <farson@shaw.ca>
Reply-to: farson@shaw.ca
Date: Fri, 19 Nov 2010 12:27:37 -0800
List-post: <yaesu@contesting.com">mailto:yaesu@contesting.com>
A common failure mode in the Quadra VP-1000 PSU is the destruction of
resistors R2A, R2B and R2C  (5.6 ohm 5W ceramic, Yaesu part number
J31379004) located on power supply board 1. These resistors act as a fuse to
protect from mains surges when turning on the power supply. Bert N8NN has
very kindly written a repair procedure for this failure mode. Here is a


My main Quadra page is http://www.ab4oj.com/quadra/main.html

The Quadra is probably the best HF amplifier Yaesu ever built. Mine is still
serving me flawlessly after more than 12 years in my station.

Cheers for now, 73,

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