At 19:48 11 December 2014, Tango Eight wrote:
We've had to change tactics slightly to deal with the Cambridge flight
reco=
rder GPS date problems recently discussed here on r.a.s.

Here's the latest:

Cambridge 302 needs a new GPS card to fix this the right way. Simply
solde=
ring in a new battery won't get your 302 through Winter storage (which is
w=
here *my* 302 vario is right now). Few people will want to remove a
vario
=
for the Winter to maintain the GPS date.

This problem will be repaired under our existing CAI 302 flat rate
policy:
=
we fix (almost) any 302 and provide a 1 year warranty and fresh barograph
c=
alibration for $350.

Cambridge model 10/20/25 flight recorders were always intended to be
mounte=
d in an easily removable fashion, so we feel that the battery only fix is
b=
etter economy for these older units. CNi will replace the GPS date
battery=
, fix your date problem and calibrate the barograph for $125. It will be
u=
p to you to maintain the battery by powering up the flight logger for a
few=
hours every 3 months or you will lose the date... there will be a
warning/=
reminder label on your returned unit to this effect.

Gary Kammerer handles all of our CAI service, please find contact info
for
=
Gary on our website.

Best regards and Good Soaring in 2015,

Evan Ludeman for ClearNav Instruments
www.ClearNav.net
please join our forum for discussion of all things ClearNav
http://clearnav.net/simplemachinesforum/index.php


With regards to the older Cambridge loggers ie model 25.
Is it feasible to mod the logger such that the GPS internal real time clock
is powered off the same user replaceable 3v higher capacity lithium battery
that provides the loggers seal ?
I was stupidly thinking of a wire and a low V drop diode ? (Would this mod
mess up the GPS by injecting interference/noise into the screened receiver
?)