I was able only to find the pinout for the Furuno GT74 GPS.
On Sun, Jan 8, 2012 at 9:50 PM, Said Jackson saidj...@aol.com wrote:
I found the gt74 gps to be lacking in performance in my Z3815. Sorry, no
data sheet for it.
I simply cut the 1pps output cable, and spliced a ublox receiver 1pps
On 01/02/2012 09:28 PM, Azelio Boriani wrote:
On the usual paybay site there are available some Z3815 with the E1938
oscillator. I have bought one and found the shielding of the Furuno GT74
GPS heavily rusted. Fortunately it is perfectly working and the seller says
all are that way. It was the
I found the gt74 gps to be lacking in performance in my Z3815. Sorry, no data
sheet for it.
I simply cut the 1pps output cable, and spliced a ublox receiver 1pps output
into it. Then I split the antenna feed to both gps and found 3.3V somewhere for
the ublox gps.
Works like a charm, z3815
To Jarl and others,
A few months ago I wrote about my Z3801A having a EFC error and an inability to
generate a lock. With the help of Jarl and others, I was able to correct the
situation. I simply disassembled the double oven (what a mess!) and made a
manual adjustment to the frequency.
On the usual paybay site there are available some Z3815 with the E1938
oscillator. I have bought one and found the shielding of the Furuno GT74
GPS heavily rusted. Fortunately it is perfectly working and the seller says
all are that way. It was the only item found with that type of OCXO.
On Mon,
I'm getting my two trusty Z3801As up and running after 18 months of
downtime and a 500 mile move. Unit #1 came up just fine.
Unit #2 has been running for about 18 hours and is working OK except
that the health status is showing an EFC error. The EFC value is above
1e6 (currently 1014166)
Dear John,
On 07/10/2011 04:38 PM, John Ackermann N8UR wrote:
I'm getting my two trusty Z3801As up and running after 18 months of
downtime and a 500 mile move. Unit #1 came up just fine.
Unit #2 has been running for about 18 hours and is working OK except
that the health status is showing an
I don't think I would call the coarse tuning adjustment 'accessible',
but it does exist.
http://www.realhamradio.com/GPS-oven-journey.htm
Of course, before digging into a mess like that, check the standard
things like power supply voltages, outer heater current draw, bad solder
joints that
Hi John,
use gravity.
Turn the unit upside down, and see if it makes the error go away. Try all 6
faces.
Maybe you find one where the g-sensitivity of the crystal brings the efc
to below 90% again.
Easy and non-invasive to do. You may see a couple of ppb change in crystal
frequency as
Dear John,
On 07/10/2011 04:38 PM, John Ackermann N8UR wrote:
I'm getting my two trusty Z3801As up and running after 18 months of
downtime and a 500 mile move. Unit #1 came up just fine.
Unit #2 has been running for about 18 hours and is working OK except
that the health status is showing an
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