[Amps] Bird 4314B - Overshoot when in peak mode
Mark Hill
g4fph at mjha.co.uk
Thu Feb 10 07:37:57 EST 2005
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.
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Mark Hill - G4FPH
E-mail: g4fph at mjha.co.uk
New web site: www.qsl.net/g4fph
Old pages mirrored on: www.g4fph.freeserve.co.uk
Dipoles resonant on 1940/3700/7080 kHz
2 ele delta loop beam resonant on 14180 kHz
Remember: A Texas Gallon is actually less than a UK one!
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