Order Tray | Contact Us | Home | SIG Lists

[aprssig] Local Event using RELAY?

Robbie - WA9INF mwrobertson at comcast.net
Tue Mar 29 11:41:46 UTC 2005


Chris,

You do not understand Chris. The D-700 would be listening on 144.990, 
but transmitting on 144.390 as if in Repeater mode. You just "offset" 
the transmit frequency by 600 khz. I have not actually done this with 
mine since I had no need to try it. But it means then, you listen on 
144.990, and with the digipeat on RELAY or whatever the tracker is set 
to on 144.990, the D-700 would digipeat it out on 144.390 without having 
any means to "hold off" transmitting if the channel is busy. Not good 
practice nor is it correct.

Robbie

Chris Rose wrote:
> The radio won't transmit if its beacon is off will it?
>  If it isn't set to transmit at set interval it won't
> unless it hears something from its digi?  If it is
> only hearing on .99, then it will only digi what it
> hears, won't it?  If it only hears on .99 then it
> would only retransmit what it heard on .99.  Why is
> that so bad?
> 
> 73,
> Chris 
> KB8UIH
> 
> --- Robbie Robertson <mwrobertson at comcast.net> wrote:
> 
>>Bob,
>>
>>That then makes the TMD-700 to transmit on 144.390
>>without listening 
>>first and thus qrm'ing anything else on 144.390.
>>That is not the right 
>>way to operate period.
>>
>>We have had this discussion before, and others
>>agreed. If there is no 
>>other transmission being heard by a station, it is
>>assumed ok to 
>>transmit, but just to turn on without listening for
>>a signal is wrong.
>>
>>If the event stations on 144.990 were to be
>>transmitting at a fast rate, 
>>even at 30 seconds, and 4, 5 or more units, then the
>>TMD-700 would be 
>>constantly key down irrespectful of other activity
>>on 144.390. I think 
>>every tracker from tt to whatever, at least has
>>"Activity" hold off!
>>
>>To suggest that others do this is not correct.
>>
>>Robbie
>>
>>Robert Bruninga wrote:
>>
>>>>>>Boyd D Garrett Sr <N5CTI at texasnative.com> >>
>>>>
>>>>I plan to support a public service event from my
>>
>>bicycle.
>>
>>>>(TH-D7)... so Net Control can track my position. I
>>
>>...have 
>>
>>>>virtually no chance of getting into a WIDE digi
>>
>>...
>>
>>>>so I plan to have my truck in the vicinity with my
>>
>>>>TM-D700 set for RELAY digipeating.
>>>
>>>
>>>Then I would set your mobile DIGI to RELAY but set
>>
>>it
>>
>>>to listen on 144.99 and TX on 144.39.  Then
>>
>>operate
>>
>>>all trackers at the event on 144.99.  That way
>>
>>they
>>
>>>get a 100% clear channel and yet the event and
>>>everything else shows up on 144.39
>>>
>>>Bob
>>>
>>>_______________________________________________
>>>aprssig mailing list
>>>aprssig at lists.tapr.org
>>>
>>
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> 
>>>
>>
>>
>>_______________________________________________
>>aprssig mailing list
>>aprssig at lists.tapr.org
>>
> 
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> 
> 
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> 
> 






More information about the aprssig mailing list