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[Amps] Bird 4314B - Overshoot when in peak mode

To: Amps Reflector <amps@contesting.com>
Subject: [Amps] Bird 4314B - Overshoot when in peak mode
From: Mark Hill <g4fph@mjha.co.uk>
Date: Thu, 10 Feb 2005 12:37:57 +0000
List-post: <mailto:amps@contesting.com>
Folks,

Has anyone else noticed pronounced overshoot on readings taken with the above type of Bird when using it in peak mode?

I recently home brewed a peak reading board for use with a Bird dual line section with standard 43-series inserts (one for 'F', one for 'R'). The card drives a non-Bird model meter (100 uA FSD) factory calibrated with the Bird model 43 scale. When I do my standard 'one CW dot' test, in peak mode, my HB card driving the non-Bird meter reads the peak value that you might expect. The Bird 4314B however overshoots by quite an amount (20%+ as I recall) on this one dot. If I send a string of dots, the Bird meter settles down after a few to read the same as my HB effort.

Is this a 'design feature' of the Bird, perhaps? I don't think what I'm seeing is anything to do with transceiver/amp PSU regulation causing the first dot or two to be actually 20% more RF than the others.

Not sure if the electronic innards of the 4314B are the same as Bird uses in its Model 43P or its after market (-400?) kit for the 43?

Regards.

Mark.

********************************************************
Mark Hill - G4FPH
E-mail: g4fph@mjha.co.uk
New web site: www.qsl.net/g4fph
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Dipoles resonant on 1940/3700/7080 kHz
2 ele delta loop beam resonant on 14180 kHz

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