[GPS_Standard] a parts setback

[Peter Mulhare]

Hi Chris

I see that you have now got a correction for the LT1485 as a DIP part.  The
8 pin DIP to 8 pin SOIC adapter plates are readily available from most
electronics retailers however.

A point regarding the RS232 converter, I used a Jupiter TU30-D1140,  I found
that at times it would be nice to talk to the GPS via RS232 as well, so to
that end I installed a DPDT miniature switch on the back of my cabinet which
switches the data in/out lines from the Control Unit and the GPS, thus
enabling me to look at either unit with the computer.  A more elegant
solution is to use a double RS232 converter using an XR222 chip, and 2 com
ports on the computer.

Pete  ZL2IK
Whangarei
New Zealand


-----Original Message-----
From: gps_standard-bounces at mailman.qth.net
[mailto:gps_standard-bounces at mailman.qth.net] On Behalf Of Chris Howard
Sent: 3 September 2010 10:09
To: gps_standard at mailman.qth.net
Subject: [GPS_Standard] a parts setback


I really appreciate the Digi-Key BOM.  My head starts to swim
when I get into the Digi-Key website.

One complaint:

The LTC1485 on the sample BOM turns out to be a surface mount part.
I'll either have to make some kind of adapter under my microscope
or go back to Digi-Key for the 8-DIP part.  I should have looked closer
at the list.

I have most of the system-level parts gathered:

Resolution-T GPS,
GPS antenna,
RS-232 level converter,
10811 oscillator.

I am torn between rolling my own power supply or ripping the one out of the
nasty 5328A counter from whence came the OXO.

When I get the board populated I plan to do a bench test using bench 
supplies
and see if it all is going to work.  I may come  back to the list for
help with a GPS timing amp if it turns out I need one.

Chris  w0ep
Columbus, MS
______________________________________________________________
GPS_Standard mailing list
Home: http://mailman.qth.net/mailman/listinfo/gps_standard
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GPS_Standard at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html