[aprssig] Wrt setup

Larry LaBranche capdiamont at yahoo.com
Sun Sep 11 10:08:35 CDT 2011

Thanks for the response. I couldn't find a ceramic in the 4.7uf either, so I had them order a 4uf like the original circuit said.

On Sep 5, 2011, at 9:52 AM, Tom Hayward wrote:

> On Sun, Sep 4, 2011 at 11:21, Lawrence LaBranche <Capdiamont at yahoo.com> wrote:
>> I got a linksys wrt54g router, ok-232 tnc(no upgrades) and a borrowed icom ht. I've put openWRT and aprx 2? on the router. Beaconing to aprs-is works.
>> Is there any problems with this setup with dup checking, etc? I think since the aprx is handling the traffic it should be fully Be compatible with the wide 1-1 etc stuff.
> aprx is fully capable of modern digipeating.
>> The circuit I've seen to connect the radio to the tnc has a 2.2k resistor and a 4uf capacitor. I can't find any capacitor locally with that value. I can find 4.7uf one. How ciritical is the value? What type of cap should I use?
> The 4.7uf should be close enough. I'd use a simple ceramic capacitor.
>> I thought about getting the open tracker plus SMD to put inside, but not sure about the voltage levels vs the 3.3V signal levels inside the router.
> The OpenTracker SMT shows RS-232 data on the pin-out, which means
> you'd need a level converter to get back to 3.3V TTL. You would also
> need a 5V supply, or use the OpenTracker SMT's regulator with the
> un-regulated input to the WRT54G (12V IIRC).
> Tom KD7LXL
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