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[aprssig] Hamfest Objects with Kenwood Radios

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Thu Jun 17 19:42:00 UTC 2010


Not necessarily injected to APRS-IS.  APRS Object definitions are 
contained in the payload of an APRS packet and are not subject to the 
AX.25 restrictions.  Check out Bob's recommendations on how to configure 
a KPC-3+ and you'll see what I mean.

Lynn (D) - KJ4ERJ

Steve Noskowicz wrote:
> Ahhh, OK.  So anything seen above that limit has been injected directly into the APRS-IS and not on RF, right?
>
> --
>  73, Steve, K9DCI   USN (Vet) MOT (Ret) Ham (Yet)
>
> ---  Geoff  wrote:
>   
>> It's not a limitation of the radios,
>>  but a limitation of the AX25 protocol
>> used to carry APRS.
>> The Callsign can only be 6 alpha chars with a numeric SSID
>> between 0 and 15
>> (-0 is the same as no SSID)
>>
>> Geoff  VK2XJG
>>
>>
>> -----Original Message-----
>> From: aprssig-bounces at tapr.org
>> [mailto:aprssig-bounces at tapr.org]
>> On Behalf
>> Of Steve Noskowicz
>> Sent: Thursday, 17 June 2010 2:41 PM
>> To: TAPR APRS Mailing List
>> Subject: [aprssig] Hamfest Objects with Kenwood Radios
>>
>> --- Bob Bruninga wrote:
>>     
>>> I prepared a web page to tell eveyrone how to make
>>>       
>> such an
>>     
>>> object and how to use APRS in support of the Hamfest
>>>       
>> and
>>     
>>> Talkin:
>>>        
>>>       
>>    www.aprs.org/hamfest.html
>>
>>
>> Bob,
>>
>> For the D700, D7 and probably D710 the limit on SSID of
>> <=15 requires a
>> modification.  The date digits can be split between
>> the call and SSID.  
>>
>> HFEST2-3  would be used for a Fest on the 23rd. 
>> I was unable to figure out
>> a way to add the sequence byte, the "x" in your
>> description.
>>
>> On my D7 I tried, but it wouldn't accept an "x" byte in
>> other (quasi-suffix)
>> locations such as: HFEST2-3A or  HFESTA2-3.  As
>> long as all other Fest
>> objects for that day have the format "HFEST-ddx", you're
>> ok.  However, if
>> someone else has one on the same date and uses the D700 or
>> D7, they will
>> over-write one another on the APRS-IS.  Locally, of
>> course, there ok.  
>> It could be added as a pre-fix, but that destroys the
>> TOCALL simplicity and
>> precludes searching for HFEST* on the net.
>>
>> It's a shame restrictions were placed on the TOCALL on
>> these radions.
>>
>> --
>>  73, Steve, K9DCI   USN (Vet) MOT (Ret) Ham
>> (Yet)




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