[time-nuts] 2201A GPS

[Paramithiotti, Luciano Paolo S]

 Hi all,
I have an Austron 2200 with antenna. I think is the same antenna used with 2201. Internally the converter is very simple to rebuilt with patient and time to spend. From the mainframe you have DC power, a 10 MHz fx to be multiplied for LO,and back the IF frequency. In the antenna assembly is also present an  rf preamplifier and filter,a  mixer and IF amp.
The more complex part is the multiplier and the LO and RF filter. All other components can be replaced by mmic and minicircuits mixer.
If I well remember the LO mixer input is 1/2 fLO =750Mhz.
I have the manual but at the moment I am out of my laboratory and I cannot verify it. 

Luciano

Luciano P. S. Paramithiotti
IZ5JHJ


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of paul swed
Sent: venerdì 8 aprile 2011 15.18
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 2201A GPS

WT
Interesting there are at least 3 total people now that have the 2201. All on time-nuts.
I have been working on my 2201 with the help of another time-nut and home brewed the antenna/downconverter. But the way I did it is really not reproducible. Unless you have a 1600 MC very stable external lockable signal generator. Like a HP8660.
It does receive satellites. But it appears that the almanac is not correct.
There were several issues before the year 2000 and the 2201 was out of production by the time the issues needed to be fixed.
I am still working on this. Slowly. Thanks to a fellow time-nut, I may have an alternate down converter from odetics that can be adapted perhaps to the 2201.
I was able to get the actual odetics system working last night for the first time. I have had it less then a week and it was not that easy.
But it is working.
So just maybe it can be recovered. Its quite a nice unit.
But at least for the moment even if you have the antenna its most likely not going to work.
Regards
Paul.

On Fri, Apr 8, 2011 at 12:03 AM, Wie Tan <tech at westernengineeringent.com>wrote:

> Hi; looking for Austron 2201A GPS antenna and manual. Please let me 
> know; I am interested in purchased one.
>
>
>
> Regards
>
> WT
>
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