Joe,
The street goes both way. The JT65 (Which I am one of) and other digital
mode ops need to listen also before they transmit. Intentional inference
happens both way.
I had intentional interference from both RTTY and Digital ops in the So
called RTTY freqs. It seems with in the RTTY Ranks that 250hz separation
is enough to go up or down from the station they just worked and start
calling cq.
Thank You!
Dave Greig N3BUO
*801 Tactical*
Phone: (682) 422-6667
http://www.801tactical.com
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Twitter: @801tactical
On Mon, Jan 5, 2015 at 9:43 AM, Joe Subich, W4TV <lists@subich.com> wrote:
>
> > If a RTTY user is on a frequency you want to use
> > then QSY or wait until its clear
>
> It isn't a matter of JT65/JT9 operators waiting on the RTTY op -
> just the other way around. The RTTY operators *DO NOT LISTEN*
> for the other modes - which have a 48 second transmit/72 second
> receive cycle. The RTTY contesters fire up *on top of* existing
> QSOs - typically during the 72 second time when one station is
> listening for the other.
>
> RTTY contest participants need to be taught about the characteristics
> of other data signals and avoid those narrow centers of activity rather
> than simply hit F1 on any frequency that shows no activity in the last
> 100 milliseconds.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 2015-01-05 10:27 AM, Liam liam wrote:
>
>> hi The bands are shared
>> If a RTTY user is on a frequency you want to use
>> then QSY or wait until its clear,,,during CW or PSK tests
>> contesters operate well into the
>> frequencys normal used by RTTY ops Most RTTY ops understand
>> and either give away a few points in the test mode or QSY to a WARC band
>>
>> Liam
>>
>>
>> On Mon, Jan 5, 2015 at 3:05 PM, Joe Subich, W4TV <lists@subich.com>
>> wrote:
>>
>>
>>> Like it or not, the bands are shared usually based on bandwidth of the
>>>> signal (depending on your country).
>>>>
>>>
>>> While that is true, IARU recognize the "center of activity" concept.
>>> The JT65/JT9 "center of activity" is x.076-x.080 *and that does not*
>>> *change* just because there is a RTTY contest - any more than the
>>> PACTOR autobots leave 14.095-14.0995/14.1005-14.115 and PSK31/63
>>> abandons xx.070-xx.074 for the duration of the contest.
>>>
>>> RTTY contesters need to learn if the dial reads less than xx.0805 they
>>> are causing *intentional QRM* to other modes and find another frequency
>>> or band. I was frankly disgusted by the number of *big guns* who should
>>> know better coming up on top of existing TJT9 and JT65 QSOs all weekend.
>>>
>>> It is time that RTTY contest sponsors make a strong effort to educate
>>> their participants about other digital activity below xx.080 (between
>>> xx.070 and xx.080) particularly on 20 and 15 meters.
>>>
>>> 73,
>>>
>>> ... Joe, W4TV
>>>
>>>
>>> On 2015-01-05 9:34 AM, Michael Walker wrote:
>>>
>>> Like it or not, the bands are shared usually based on bandwidth of the
>>>> signal (depending on your country). If you want channelized operation
>>>> you
>>>> may have to look elsewhere--just not ham radio.
>>>>
>>>> Be very happy we have this flexibility.
>>>>
>>>> Mike va3mw
>>>>
>>>>
>>>> On Sat, Jan 3, 2015 at 9:04 PM, Lynn W. Taylor, WB6UUT <
>>>> KX3@coldrockshotbrooms.com> wrote:
>>>>
>>>> I'm just guessing, but didn't someone on the list say there was an
>>>> RTTY
>>>>
>>>>> contest?
>>>>>
>>>>> Isn't it fairly common for contesters to get a bit "enthusiastic" and
>>>>> overlook things, especially when the op is a contester, and not
>>>>> necessarily
>>>>> on RTTY at any other time?
>>>>>
>>>>>
>>>>> On 1/3/2015 5:39 PM, Harry Yingst via Elecraft wrote:
>>>>>
>>>>> What up with all the Lids running JT-65 right over the top of
>>>>> existing
>>>>>
>>>>>> JT65 QSO's
>>>>>> Haven't they ever head of Listen before you transmit?
>>>>>> Better Yet have they heard of a Band Plan?
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>> RTTY mailing list
>>> RTTY@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rtty
>>>
>>>
>> _______________________________________________
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>
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