[Icom] Summary of 60 Meter Performance of IC-765 (long)

[Sheldon Daitch]

David, 

Interesting question re the YLs, but they would need to use the
same offset as others.  Even tho the YL voices usually have a 
higher range of frequencies, the audio path in the transmitter 
still remains the same, roughly the same 2.4 kHz wide bandwidth, 
so the upper end of the transmitted audio is not increased.

If a YL offset their transmit by -2kHz, you'd have to offset 
your receiver by the same amount to make them intelligible, assuming
SSB operation here.  

73
Sheldon
WA4MZZ

"David J. Ring Jr - N1EA" wrote:
> 
> I agree George.  I think it's odd.
> 
> What do the YLs do?  Offset -2000 to make up for the higher voice frequency.
> 
> FCC would have been better off specifying the frequencies as the ITU does
> (and they also do) with carrier frequencies.
> 
> See a listing like this one for marine http://www.mmsn.org/ncs/HFfreqs.htm
> 
> Everyone is on the same frequency - the channels are 3.0 kHz spaced - you
> can operate channel 401 right next to channel 402 fine. (4357kHz vs.
> 4360kHz) all channels USB from 1.700 MHz to 25 MHz.
> 
> Directprinting radioteleprinter is done the same way, but you have a little
> bit of math to do to offset the modem frequency.
> 
> 73
> 
> DR
> --
>