[OZAPRS] Using Maxon Radios for RX

[Andrew McDade]

Gday Craig,

Im using Pin 2 for the audio out , Pin 1 for the TX audio. I haven't as
yet 
stuck a 2k2 resistor onto pin 7 , So Im probably only TX'ing 2.5 watts !
I gather you got a copy of the service manual from Garry when you bought
the 
radios ? Theres pretty good info on alignment procedures in there.

Regards .. Andrew .. VK5EX



----- Original Message ----- 
From: "Craig Turner" <craig at craigturner.id.au>
To: "VK / ZL APRS Users" <ozaprs at aprs.net.au>
Sent: Wednesday, June 21, 2006 8:46 AM
Subject: Re: [OZAPRS] Using Maxon Radios for RX


> Hi Andrew,
>
> Ok, well, I'll play around a bit more. Which pin are you reading the
data
> in from?
>
> I've never aligned a radio before, so I guess its time to learn! I've
got
> two of them, so I can afford to play, by the way, both seem to be the
same
> in terms of reception, although the APRS has gone quite in VK1 lately, I
> think the local IGate may be down.
>
> Regards
> Craig
> -- 
> --
> http://www.craigturner.id.au
>
> Andrew McDade
>> 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
>> about
>> 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
>> a
>> 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
>>> VK1HCT
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>>> Ozaprs at aprs.net.au
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>>
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