[RTTY] 80M DIGITAL SUB-BAND in JA

[john]

I think that would be the safe and best way--think we need to petition 
FCC to expand rtty to 3620   would be a great help, for all contests , i 
would think   73 john w8wej
On 10/17/2014 19:53, Ed Muns wrote:
> Another alternative for working JAs between 3599 and 3512 kHz, is to work
> split.  Then both stations can reside well within their legal band segments.
>
> Ed W0YK
>
> ----------------------------------------------------------------
>
> Bill W6WRT wrote:
>
> Antennas on 80 meters can be a problem, SWR-wise. If your antenna
> covers 3520-3530 then you should probably operate there. But not all
> antennas do and the higher segment may be a better option.
>
> In the higher segment mentioned above, US hams can transmit only
> within a 1 kHz segment:  3599 to 3600 kHz.  Be careful with this. Most
> of us using FSK have transmitters that show the mark frequency, so you
> should put the mark slightly below 3600. That way the space frequency
> will be 170 Hz down from that, which allows the JA's to reply on your
> frequency and still be within their segment. Allowing for sidebands, I
> would recommend US stations go no higher than 3599.900 for the mark
> freq.
>
> Another consideration is that if US stations have their mark freq at
> 3599.170 or below, the US station will be legal but the JA station
> will not. Strictly speaking, because of sidebands you should be even
> higher than that. I would suggest a mark freq of 3599.300 as a minimum
> and a bit higher would be even better just to be safe. I don't know
> how picky the JA authorities are about sidebands, but better safe than
> sorry.
>
> Folks using AFSK need to do the math VERY carefully!
>
> I'll be using 3599-3600 myself.  Hope to see you there.
>
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