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[AMPS] Power out indicator

To: <amps@contesting.com>
Subject: [AMPS] Power out indicator
From: Peter.Chadwick@zarlink.com (Peter Chadwick)
Date: Mon, 18 Feb 2002 11:47:55 -0000
Tom said:

>I hear that rumor repeated, but I've never been able to find that in 
>any tuner I have ever seen.

The tuner for the British Army D11/D13 tx's could certainly do it. 

I've seen it in a Z match, too. Not often - depends on the load. I don't like
the Z match anyway.

>What does happen is there is a smooth and gradual reduction in 
>efficiency as the Q is made higher,

Especially in a Z match - which is why I don't like it.

To avoid any misunderstanding here, I (and I believe Tom is, too) am talking
about the working Q of the matching network, not the Q values of the individual
components in it.

RF ammeters or torch bulbs as indicators give a 'feel good' factor. Of course,
if the tuner is remote, the difficulties of implementation far outweigh the
advantages of having the indication.

73

Peter G3RZP



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