Thanks Geoff:
The higher the frequency of the signal you use as your 'standard' the more
accurate your REF CAL adjustment will be.
If you can use WWV / WWVH, try to use it, and at the HIGHEST frequency at
which you can hear it... 20MHz if possible, then 15 MHz, and lastly 10 MHz
if the higher frequencies cannot be received.
When performing K3 REF CAL, BEFORE going into CONFIG | REF CAL, find
WWV and then
adjust your SPOT tone (using MONITOR in CW mode) so the level of the
SPOT tone is
as close to the level of the WWV signal as possible. This will give
you the deepest
nulls when attempting to achieve a really close zero beat during REF CAL.
NOTE: Unless Wayne's recently fixed it, there is a bug in the
firmware which can
cause some odd actions if you attempt to change the SPOT tone PITCH
while you are
in REF CAL, so be sure to make any adjustments to the SPOT tone
outside of REF CAL.
73,
Tom N0SS
At 16:53 01/12/2008, Geoffrey Mackenzie-Kennedy wrote:
David Ferrington, M0XDF <[EMAIL PROTECTED]> wrote:
I'd like to get a list of KNOWN frequencies of broadcast stations in 10 -
40m in the UK - it's been pointed out tpo me that using BBC WS at 648 KHz
is
a not so good, because its a low freq.
----------------------------------------------------------------------
The World Radio TV Handbook is one useful source of this kind of
information. Using a frequency marker which can be phase locked to
Allouis, France ( 162 kHz - 2 Megawatts), I have found that the
frequency of most if not all the BC stations above 7100 kHz are at
the 5 kHz intervals as listed when the propagation is stable.
Although WWV at 10 MHz can be quite strong here, down to S4 at the
moment due to Aurora, 10 MHz is a busy frequency at times here with
WWVH, BPM and others sharing the frequency and IMHO is not the best
reference to use - putting aside any possible effects on "accuracy"
due to propagation over the long distance to the UK.
73,
Geoff
GM4ESD
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