Hello Joe,
I am unsure how you would use the calibration technique on a single band
VHF or UHF radio, as unless the operator has a known reference signal to
use I can not see how that works.
There are no in band reference signals for them to use in VK and other GPS
locked signals may be very weak for them to find and net to, Most
operators seem to be able to get to within 500Hz of centre but it would
seem there are always a few who fall out of passband.
In WSPR 2.11 I could go and run multiple copies of the EXE and set the
middle frequency +300 on one copy and -300 Hz on the other and give myself
a panorama but under Win 10 WSPR 2.x gives lots of error and dies for me,
so gave up on that.
Back to the drawing board... Oh is there any way to set the middle freq
on WSJT-X in WSPR mode, if so I could repeat my earlier multi copy trick.
Regards,
Peter.
On Mon, Apr 30, 2018 at 10:59 PM, Joe Taylor <j...@princeton.edu> wrote:
> 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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