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[AMPS] Tuned Input Circuit Board

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Subject: [AMPS] Tuned Input Circuit Board
From: (Phil Clements)
Date: Wed, 11 Jul 2001 10:22:03 -0500
In addition to the below, most of the after-market tuned input
boards I have seen have relays that are too small for the job.
They were marginal @ 100 watts, but the newer higher output
transceivers will zap them with ease!  Caveat Emptor!

Phil, K5PC
Subject: Re: [AMPS] Tuned Input Circuit Board

> > FAR Circuits is offering up a copy of the Tuned Input
> > Board made for the Dentron GLA-1000B amplifier.  It
> > may be a good way to install a Tuned Input into other
> > amps.  I have some of them and have found them to be
> > excellent boards and very well made.
> Amp supply and Dentron always had trouble with DIP relay failures
> in the ten meter position of that board when used for heavy CW
> use, like contesting. This was especially true with tubes having a
> lot of input capacitance or low driving impedances.
> Other than being unreliable with high duty-cycle ten meter
> operation, and an occasional problem on 15 meters, the boards
> worked quite well.

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