[Motorola] Motorola Manual wanted

[Geoff Fors]

The cell phone described as F19ATA8822AE is a Dyna Tac 4000XM phone dating
from 1985.  It should have two connectors on the front.  These were sold to
Ford as OEM rebranded components.  The Motorola manual is part number
68P81049E55-A.  Possibly MDM Radio has a manual in stock; there's not really
any demand for them.  The manual is a huge book with many long 11x24
fold-out pages.  The 4000XM phone had a large cradle with rotary volume
controls and switches, and a captive handset.

Ford also used the more expensive 6000X phone, which was re-labeled "Ford
Electronics."  That phone was a variation of the F19CTA8830 series radio
package in that the speaker amp and speaker-phone components were built into
the radio drawer instead of being inside the speaker housing.  The 6000X has
a single connector on the front.  The cables for that phone contained Ford
connectors which allowed it to hook into the vehicle wiring harness and use
the car's stereo speakers and wiring for certain functions such as muting.
The 6000X has a self contained handset with a modular plug, and the cradle
is just a hang-up cup. The manual supplement covering that model of Ford
phone is 68P81115E59-O, which must be used with the regular Dyna Tac manual,
part number 68P81066E40-A.  The 6000X phone is handset programmable (with an
adapter.)  The cheaper 4000XM requires a 32x8 prom programmer and the NAM
(number assignment module chip) must be replaced each time.

I am not aware of any carriers who will activate an analog-only cell phone
anymore, so as is pointed out, it's a collectible or parts source at this
point.  The PA before the trisolector has a rated power of 5 Watts output
and there is a rather complex VSWR sensing bridge and foldback circuit as
part of the output stage.

There are some European hams who have converted old analog cell phones to
the adjacent ham bands, but there doesn't seem to be much interest in this
country.  You can buy a 900 MHz conventional Spectra, MaxTrac, or MTX900 on
eBay for less than $ 100, which for most of us is a cheaper alternative to
spending the huge amount of time it would take to convert a cell phone to
that range.  But for the curious, the manuals listed above cover everything
about the phone circuitry.

Geoff Fors
Monterey CA