Glenn wrote:

I've been looking into the ICS525 chip myself, and coincidentally talked
yesterday to one of their engineers.  He warned me that these chips are
designed as clock replacements, not RF oscillators, and the phase noise
would likely be unacceptable for analog RF uses.

John

RWarner@synergy-gps.com writes:

The [UT+] receivers with a P/N that ends with a "2" have v2.2 firmware

The last "1" means it has a right angle antenna connector. (On the UT+)

I think the first "2" means it has an on-board lithium battery.

The first "3" might refer to the GT series. I have a UT+, which is
R5122U1112.
(straight ANT connector, no battery)

Hope this helps.

cheers,
glenn

Dave Brown wrote:

Hi Brooke,

Awhile back I was looking into SMD rework stations, and I looked pretty
carefully at the Quakko stuff.

I didn't like the 850D because it was not servo controlled for temperature,
and the air flow adjustment was a blind guess.  So I bought the Aoyue 2738 directly
from the factory.  I liked it so much that I now sell the units.  The 2738 is
designed to provide the extra power needed to handle lead-free solder, and as
a result, it has a 70w digitally temperature controlled fume free soldering iron
as part of the station.  The soldering iron takes around 5 seconds to come up
to full heat, so there is no need to leave it running all the time.

The hot air rework section is digitally servo controlled for temperature, and
digitally controlled (non servo) for the air supply.  To make it possible to
do repeatable work, there is a floating ball air flow meter on the front panel.
The air flow meter allows you to take into account variables such as the different
restrictions caused by the different hot air nozzles.

Best work with a rework station is done using an underboard preheater.  The
preheater takes the board up to 100C, or so, which all SMD parts can handle.

-Chuck Harris

While my stocks last, I can make the Aoyue 2738 available to this group for
$235 plus shipping.  That includes the rework station, 6 nozzles, a vacuum
tweezer, a chip lifter (popper), a silicone pad, a soldering iron holder,
and a fume extractor for the soldering iron.  Visa and MC accepted.

Brooke Clarke wrote:

Hi:

To get some feel for what these will sell for I'm auctioning a prototype
unit as eBay item number 7616994287.

Have Fun,

Brooke Clarke, N6GCe

Brooke Clarke wrote:

--
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com

Brooke Clarke wrote:

I looked at the ebay listing and it looks like it would be good as a
106.5 MHz signal
to lock another oscillator to get a 10.244 signal for a 10GHz convertor.
The second
oscillator would clean up the close in phase noise and your circuit can
be locked to
a 10 MHz signal of whatever quality  needed.

Don't know if you can produce them at $40.00 or so but I would be
interested in what
you come up with

Bill K7NOM

Hi Bill:

I can not make them at $40, but I'm willing to let one go that  low just
to see what the market looks like.

The description will be changed to indicate that the upper output
frequency should be 250 MHz not 200 Mhz.
I've also found the formula for setting the SIP switches, it's:
Fout - Fin * 2 * (V+8) / ((R+2) * S)
V and R are straight binary but S needs to be looked up in a table:
000=6
001=2
010=8
011=4
100=5
101=7
110=1
111=3

Have Fun,

Brooke

Bill Janssen wrote:

--
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com