[time-nuts] Austron GPS 2201a ops and serv manual uploaded to KO4BB site

[paul swed]

We time nuts now have a set of manuals for the Austron 2201a GPS receiver.
Thanks to K4CLE for the ops manual and I had the service manual they have
been encoded to pdfs and uploaded to Diddier's site for posting when he
gets ready.
Diddier upload puts them in root???

The service manual is 600 DPI so there are 4 files approx 6 MB each. The
Ops manual is at 300 DPI and is a single 4 MB file.
So the good news is that these austrons can be made to work. Even without
the always missing antenna.
Couple of points.
You have to set the week and day back to 1992 or 1024 weeks ago.
Its good if its been off to use manual mode and select a sat high in the
sky to reload the almanac give it an hour.
Further the memory batteries almost always dead replace it and make sure
the memory draws 10 ua or less.
Otherwise you have to go back through the setup again every time you power
it.

Those nasty missing down converters.

Using a Odetics down converter  (Thanks Pete of time-nuts fame) a fairly
reasonable 35.42 Mhz to 75.42 Mhz up converter can be built but it uses
filters and multiplier tanks and not sure those are that reproducible..
This allows the receiver to work measure various offsets like an HP3801
down in the 4.5 X e-12 region after 2 days.

Thanks to Doug above I am trying two methods to use a Novatel starview
receiver that also puts out a 35.42 Mhz IF. The methods have to do with
trying to build the simplest of up converters. One method has worked, but
you need really good eyes to connect into the circuits. Also trying an even
simpler method, but its unclear its working very well. All of these methods
are very inexpensive if you can find the odetics or starview receiver.
Regards
Paul
WB8TSL