[OZAPRS] Using Maxon Radios for RX

[Craig Turner]

Just a follow up for those using the Maxon radios for RX.

Mine is now working fine. I'd like to say I aligned it properly or 
something, but I didn't. The problem was in the TNC, it took a very 
small amount of playing with the DCD trip pot in the TNC-X and then the 
Maxon received and transmitted perfectly fine.

Regards
Craig
Andrew McDade wrote:
> 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
>>>> http://aprs.net.au/mailman/listinfo/ozaprs
>>>>
>>>>
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>>>>
>>>>
>>>
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>>>
>>
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>

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