[SFDXA] I have a question regarding Packet Radio...

[Bill]

Hi Victoria,
I am going to share this with SFDXA Club reflector. I am guessing 
someone can help.
Bill Marx W2CQ


On 2/12/2013 12:51 PM, Victoria Levy wrote:
> Bill (W2CQ),
>
> This is Vickie Levy (K4VML)... I have a question regarding Packet 
> Radio transmissions on 2m & 70cm, this may be outside the relm of your 
> club activities, but I'm hoping you, (or anyone in your club) may have 
> some experience in this area and can provide me with some 
> input/guidance...
>
> I am interested in setting my home-station with a TNC modem [1200 
> baud, 9600 on 70cm I believe], (in fact, I'm building one as we speak) 
> so that I can communicate via FSK modulated packets, which I believe 
> uses the AX.25 modem protocol ?
>
> I understand, from some on-line search, that packet/digital data is 
> exchanged for both basic messages BBS services and APRS/GPS & weather 
> data on the lower portion of the 2m band for example, but when I tune 
> a receiver to the frequencies that I would expect to hear some audible 
> tone-bursts, I hear absolutely nothing...!!!
>
> So, I think the correct places/frequencies to be listening are: 
> 145.01, or .02, 03, 05 or possibly 145.090MHz, is this not correct, 
> (this is of course for 2m, I don't know off hand what the frequencies 
> are allocated for this on 440/70cm, but maybe that's where the 
> activity is for AX.25 packet ?)
>
> So my point is, before I build this new hardware, install some TNC 
> software on a PC and try set this all up and then hope that I can 
> communicate with someone, It will be silly for me to waste my time if 
> no one is transmitting...!!! If I at least know where to listen, I can 
> setup the TNC modem hardware & software and monitor to see what 
> traffic there is out there... Hopefully someone to send messages to or 
> possibly chat... but as you know, it's no fun if there's no one to 
> talk to...!!!
>
> (Perhaps there is activity, but only at certain times of the day and 
> I'm just not listening at the right times ?)
>
> Rgds,
>
> Vickie Levy  (K4VML)
>  interpolation at msn.com