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Re: [Amps] Pin Diodes

To: "Rob & Terri Sherwood" <rob@sherweng.com>,"Amps Amps" <amps@contesting.com>
Subject: Re: [Amps] Pin Diodes
From: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 8 Mar 2006 06:45:32 -0500
List-post: <mailto:amps@contesting.com>
>  I don't believe an amp with vacuum relay T/R
> switching can be considered a full QSK amp.   Yet Alpha advertises the
> 99 and the 9500 as full QSK.   I run my 99 in semi-breakin only. How
> long can a vacuum relay last in full QSK mode?

The vacuum relay in my Alpha 70V has lasted 36 years.  A vacuum relay with 
an appropriate accelerator circuit can switch nearly as fast as a PIN diode.

Paul, W9AC 

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