[600MRG] JT9 and split - food for thought?

[N1BUG]

Yes, that change in behavior where it does not always move TX freq
when double clicking a call sign is driving me insane! Not that I
had far to go. I hate that "feature". I believe there is a way to
force it by holding down some key or other while double clicking,
but I need to find it in the manual so I can start training myself
to do it.

Many of the JT9 signals I saw last night were not decoding even
though the appeared visually to be overriding the interference.
Evidently my particular flavor of local PWM / motor speed controller
really confuses the JT9 decoder. Audibly the interference is a buzzy
whirring sound, definitely not clean or steady tones. Visibly it
appears to be tight clusters of waterfall lines with spacing of a
few Hz (not visibly much different from JT9 tone spacing,
actually!), several lines per cluster. I don't wonder the decoder is
confused.

73,
Paul N1BUG



On 11/20/18 10:00 AM, Larry wrote:
> I agree with Paul, the "calling split" has caused me some heartache as 
> well for some of the same reasons.
> 
> I will always position myself (when calling CQ) in a locally clear spot. 
> Callers off frequency run the risk of being right on a SMPS spur and 
> might not get decoded or even seen on the waterfall.
> 
> Some call offset because they think they have a better chance if there 
> are multiple callers. Possibly, but probably not. The software WILL 
> decode several signals on virtually the same frequency. The software 
> will USUALLY decode a weak signal buried in the spurs but not always. 
> Depends on the actual spur.
> 
> A big part of this is that the software GUI has been tweaked to optimize 
> FT8 contest operations much to the detriment of JT9 true weak signal 
> work. A simple double click does not always move your TX frequency to 
> where you think it should be or even where it's supposed to be.
> 
> 73,
> 
> Larry - W7IUV
> 
> On 11/20/2018 4:20 AM, N1BUG wrote:
>> Last night I thought I was getting very few replies to my CQ
>> (considering I am somewhat rare, LOL) but noticed what appeared to
>> be an increase in activity on the band during the times I was
>> calling CQ. This morning it was pointed out that I had several
>> people calling me whom I did not respond to. They were operating
>> split and I never decoded them.
>>
>> I realize operating split is the fad these days and it may alleviate
>> collisions between callers. In theory, it's a great idea. Especially
>> so if I am somewhat sought after and not just delusional... ;-)
>>
>> HOWEVER...
>>
>> Thanks to motor speed controllers, switch mode power supplies and
>> other assorted RF renegades, I had just two or three roughly 40 to
>> 50 Hz windows that were clear last night. When calling CQ I tried to
>> center myself in one of them and hope for the best. Some who called
>> split probably ended up buried in/under the pollution. In fact I did
>> see many JT9 signals so positioned that did not decode.
>>
>> I don't have a solution, just saying...
>>
>> Maybe if you don't get a reply after a few cycles, try moving?
>>
>> It appears I will be on for at least a few more nights, hoping to
>> catch some more new states and hand out Maine to those who need it.
>>
>> 73,
>> Paul N1BUG
>> FN55mf
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-- 
Paul
N1BUG  2200m-2m        DXCC Honor Roll
FN55mf      ME      Piscataquis County
http://www.n1bug.com
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