Magellan GPS Commander

© Brooke Clarke 2012


Background
Description
Related
Links

Background

There's no contract number on the label so I think it's a prototype and probably made to compete in the first round military competition for the first generation GPS receiver that ended up being the PLGR.  This receiver has a look, feel, and size that compares to the PLGR.

Description

Non working.  After modifying one of the 5800BA battery adapters with a file to reduce it's O.D. and installing only 4 AA cells (to keep the diameter smaller) the unit does not power up.

Magellan GPS
                  Commander
Push Button switch top rear
3 metal threaded inserts at top facing to back & no others
Magellan GPS
                  Commander
J1: Antenna, J2: ?-5P, J3 ?-8P
Whan brand & model are these connectors - tell me
Magellan GPS
                  Commander
Uses BA-5800/U as primary battery and came with a CR123 as the memory backup battery.

Notice cract in bottom of primary battery compartment and distortioni in adjacent threads compared to how clean threads
are in backup battery compartment.
Magellan GPS
                  Commander
5800BA Battery Adapter Modified for Smaller Diameter & w/only 4 AA Batteries & with Dentar Floss to Pull Out of Battery Compartment
Magellan
                GPS Commander & 5800BA Battery Adapter Modified for
                Smaller Diameter & w/only 4 AA Batteries
 Magellan GPS Commander     PLGR
DAGR                                     Polaris
PLGR, Magellan GPS Commander, DAGR, Polaris
                  Receivers
Inside View
Magellan GPS
                  Commander Inside
There's what appears to be J-B Weld epoxy near the primary battery opening.Not sure where the metal part belongs.  Probably at the back of the antenna coax connector.
Large cap is 0.1F so this may be a real time clock board
Magellan GPS
                  Commander Inside
Note missing IC, maybe the crypto chip?
RF box at left and micro controller at right top view
Magellan GPS
                  Commander Inside
The two ICs with labels (in sockets) are the memory chips   that contain the firmware.  To the right of them are a couple
of RAM memory chips.
RF box at left and micro controller at right bottom view.
White connector at lower right is the connector for the flex circuit, difficult to reconnect after soldering the 5 joints.
Magellan GPS
                  Commander Inside
Note the metal strip attached to the antenna coax connector
ground.  Maybe it was bonded to the metal part shown above?
back of front panel.  standard 44780 LCD driver chip + keyboard lines.
Magellan GPS
                  Commander Inside
Ther are what appears to be a bundle of fiber optic light pipes
that are probably part of the keyboard illumination system.
maybe PCB is for primary and back-up battery management?
Magellan GPS
                  Commander Inside
5 Unsoldered Connections (What Goes Wrong)
Magellan GPS
                  Commander Inside
Note: Once soldered the "L" shaped board can no longer
be seperated from the front panel.

After soldering the unit still does not power up.



Related

Navigation
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Stanford Telecom 5001A Single Satellite GPS Signal Generator
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URN-502 Vehicle Mount GPS Receiver System

Links

Purchased from RF-COM-MILITARY-SURPLUS-PARTS

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page created 10 Apr 2012.