[OZAPRS] Using Maxon Radios for RX

Andrew McDade amcdade at iprimus.com.au
Wed Jun 21 08:39:54 EST 2006

Gday Craig,

Yes Im currently using one on 145.175 as a digipeter. Its married up to a 
KPC3+ , so makes for a very small and power efficient package. I find that

the radio seems to "nearly"  hear everything that my other shack radios 
hear. This kind of surprised me due to Garry's comments regarding RX 
sensitivity being a bit down at around -114dbm at the lower part of the 2m

band. Maybe your radio's RX just hasn't been aligned as well perhaps. Im 
unsure about the RX IF bandwidth suggestions. The Service manual talks
acceptance of both 12.5Khz channel spacing at 3.5Khz deviation and 25.0Khz

channel spacing at 7.0Khz. Maybe there are a couple of different versions
or perhaps a programming option somewhere. We'll need to investigate this
little further later on .

Regards ... Andrew .. VK5EX

----- Original Message ----- 
From: "Craig Turner" <craig at craigturner.id.au>
To: <vk3jfk at amsat.org>; "VK / ZL APRS Users" <ozaprs at aprs.net.au>
Sent: Tuesday, June 20, 2006 8:15 PM
Subject: [OZAPRS] Using Maxon Radios for RX

> Hi,
> With all these maxon radios being bought, is anyone using them for RX as
> well as TX? I am trying to set up a TNC-X with the X-Track option in my
> car. At the moment its set up in my lounge room, with an antenna located
> outside on the roof. I'm in an area that gets good coverage from
> VK1RGI-1 on Mt Ginni in the ACT.
> Anyway, my TX seems to work fine.
> I have the input GND connected to Pin 4 on the Maxon, and the TNC-X rx
> line connected to Pin 2 (which is labelled in the maxon service manual
> as 'Muted Demodulation Output) I have tried also pin 9, which is
> labelled (Data out low level filtered output), which doesn't seem to
> work either.
> I have limited sucess by using a HT and a TT about 10 feet away from the
> antenna, and it works, but not much further than that.
> Anyone got any advice?
> Regards
> Craig
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