[Swan] Need 250C help

[Glen Zook]

True, but how many amateur radio operators even know
about the Transcom units?

The Swan 250 series is "OK" for "hunt and pounce" type
of operation.  But, for any operation that involves
lengthy transmissions or series of transmissions they
do "tend" to be a bit "drifty"!  Some units are better
than others but they all seem to drift quite a bit.

The fact that the VFO covers the entire 4 MHz of the
band with the "band set" variable capacitor doesn't
help with the stability at all!

It is a fault with the vast majority of Swan units (HF
as well as 6 meters) in that instead of using a
relatively narrow VFO (i.e. 5.0 MHz to 5.5 MHz) and
heterodyning the frequency to various bands with
crystal controlled oscillators Swan chose to mix the
VFO directly with the SSB generator.  The result is
the higher the band the higher the VFO frequency has
to be.  The higher the VFO frequency the harder it is
to get good stability.  Also, the harder it is to get
decent calibration.

Glen, K9STH


--- Greg Mijal <bluebirdtele at earthlink.net> wrote:

Aw  come on Glen!
It ain't that bad!  It's not a Transcom right?









Glen, K9STH

Website:  http://k9sth.com


       
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