How cool would it be, then, to have an activity night where we could try these
different modes and
learn together how they behave at 160.
What would be even cooler is to have a 160 antenna, but that is my problem ;)
73! - jeff wk6i
Joe Subich, W4TV wrote:
>> 160 meters is different from other bands in some
>> respects and it might be interesting to play around with it. For one
>> thing, groundwave is excellent, better than any other band, I believe.
>> Jim is about 100 miles from me and even running low power he was 20 to
>> 30 over S9.
>
>>From a technical perspective 160 meters poses significant issues
> for skywave RTTY. In particular, multipath and differential
> fading are much worse than even on 80 meters (and they are already
> problem there).
>
> If one were going to attempt serious work on 160 as opposed to
> simply cluttering the band with another high power local signal,
> it would be far better to use 23 (22.725) Hz shift FSK. PSK31 or
> a slower PSK31 -like mode that was far less effected by multipath
> and selective fading.
>
> Emission modes with high baud rates, multiple tones and/or
> wide shifts (a wide spread between lowest and highest tone)
> are not well suited for lower frequencies. Although it is
> another couple orders of magnitude lower in frequency, the
> military has even resorted to on/off keyed RTTY in the LF
> spectrum (60 - 200 KHz) at very slow speeds due to the technical
> limitations.
>
> 73,
>
> ... Joe, W4TV
>
>
>
>
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>
>
--
Jeff Stai jds@twistedoak.com
Twisted Oak Winery http://www.twistedoak.com/
Winery Blog http://www.elbloggotorcido.com/
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