Hi Peter,
On 4/26/2018 7:56 PM, Peter Sumner VK5PJ wrote:
as WSPR has been around for a long time now its value is well known
on HF and 50 MHz but as frequency increases the ability to find rigs
with the needed frequency stability and accuracy is not always easy.
There is a diverse group of operators in VK that have been running WSPR
on 144 and sometimes 432 for many year but not all of us have access to
a rig with accurate frequency ability. I am lucky to have a IC-910 with
the VK3HZ XREF locking board to my GPS but some others rely on what was
there when bought.
It seems that your query is really not about frequency stability, but
rather frequency calibration. WSJT-X has an easy-to-use facility for
calibrating your radio. Anyone using WSPR on VHF and higher bands
should definitely use this feature -- and preferably leave the radio on
at all times, so that it's always "up to temperature". It's not
difficult to ensure that your WSPR signal is where you want it,
certainly to within 10 Hz or so, even at 144 or 432 MHz.
-- 73, Joe, K1JT
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