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The 'MASTR' Index of GE Conversion Information
Maintained by Kevin Custer W3KKC
   
General Electric / Ericsson / Com-Net Critical 
Communications / M/A-Com / Tyco / Harris radios

Over the last several years the company originally known as the Land Mobile Radio Division of General Electric Company has been sold several times. The names have included General Electric, Ericsson, Com-Net Critical Communications, M/A-Com, Tyco and now Harris. Just to keep things simple, and because GE was the company name at the time most of this equipment referenced below was manufactured, we are going to use the name GE exclusively.


There are three popular email groups that cover GE radios. The first, YahooGroups GE, covers anything GE, the second, YahooGroups GE-MASTRII covers just the MASTR II series, and the third is for the MASTR III series.

If you are at all serious about any of the GE radios I suggest that you join one or more of the groups.


For quick access to model-specific information use these in-page jumps:
Century II       Custom MVP       Delta       Exec II Info       Frequency Agility       LBIs
Manuals and Technical Info       MASTR II Mobile and Station       MASTR II Mobile
MASTR II Station       MASTR II Miscellaneous       MASTR II 220 MHz Conversions
MASTR II Mobile Suppliers       MASTR III Station       MASTR Pro       MLS and MLS-II
Monogram       MPA       M-RK       MVS       PCS       Phoenix and Phoenix SX
RANGR       Test Sets and Tuning Tools       Trivia and Miscellaneous

We have very little information on the MASTR IIe or MASTR III series.
Would someone like to write an article on them?


Manuals and Technical Information:

Currently stocked manuals can be ordered from the Customer Care Center at 800-368-3277 or call the Publications department directly at 434-832-6592.

The "MASTR" list of LBIs    Nearly 2 gigabytes of free downloadable GE Technical Manuals in PDF format
Finding a Manual for a GE Mobile Radio    17 kB PDF file by Eric Lemmon WB6FLY
List of Ericsson Technical Publications    3 MB PDF file
GE Technical Information    by Duane Hall of Hall Electronics (Offsite link)
The GE email group    For people seeking information on General Electric or Ericsson equipment
The GE MASTR II email group    For people seeking information on GE MASTR II equipment
GE Manuals from Ted Jansen    A good source for original GE manuals
GE Duplex Operation Curves    by Dave Kaar KA9FUR (Offsite link)
Curves that show the needed isolation for different GE Station configurations.
GE Part Number to Generic Part Number List    by Jim Cannon K7KL   48 kB PDF file
A list that allows cross reference from original GE part numbers to generic part numbers
GE Product Code Publication Indexes    compiled by Robert Meister WA1MIK - An alphabetical list of the various product code publication indexes
Some Older M/A-COM Data Sheets    compiled by Robert Meister WA1MIK - A bunch of older (1982) M/A-COM data sheets for combiners, couplers, filters, etc.


Information applicable to both the MASTR II Mobile and Station:

Combination number decoder page for the MASTR II    by Dave Cochran NØTRQ (Offsite link)
Decyphering the combination number into general information.
The GE MASTR II email group    For people seeking information on GE MASTR II equipment
GE Crystal Information    by Doug Bade KB8GVQ   470 kB PDF file
This is a PDF of all GE crystal formulas in the Service Parts Book.
Basic GE MASTR II ICOM information    Basic differences between EC, 5C and 2C (with pictures).
GE MASTR II ICOM information    A comprehensive page on GE ICOMs. (Offsite link)
Why should you spend more money to have a channel element or ICOM temperature compensated?    by Kevin Custer W3KKC
Playing with the 5C ICOM    How it works, voltage analysis, and more - by Robert Meister WA1MIK
A schematic of the exciter audio "blob"
A cleaner schematic of the exciter audio "blob" above    Redrawn by Robert Meister WA1MIK
A MASTR II S-Meter Circuit    by Andy Kadvan KA8R from an old issue of ACC notes (see the ACC page at this web site)
A crystal frequency calculator for the MASTR II    A downloadable Excel spreadsheet from John M. Kester KD6FVA
Squelch modification for the MASTR II    by Kevin Custer W3KKC and Scott Zimmerman N3XCC   A modification for making the MASTR II squelch work better.
Installing a TS-64 into a MASTR II station    A photo article based on original information from Doug Sharp K2AD
GE MASTR II Bandsplit Modification    by Matt Lechliter W6KGB   Converting a 450-470 radio to 420-440 MHz.
Help!! My UHF MASTR II self quiets after conversion    by M. Scott Zimmerman N3XCC
Help, my MASTR II has lost receiver sensitivity!    Some MASTR II front end helical castings grow internal whiskers and short themselves out
MASTR II intermittent sensitivity    by Joe Szczech, Jr. K1IKE - An issue with MASTR II front end helical coils that break loose from the casting.
MASTR II I-F alignment procedure    by Patrick M. Conway WA6JGM - IF alignment for MASTR II, Executive II, and Custom MVP radios.
Identifying UHF PA deck components    A table of part numbers that will help identify what range a PA deck was made for.
A GE Technical Services Memo on substituting the UHF PA transistors    Donated by Darrell Manning KI4BST   96 kB PDF file
This writeup explains how to use Motorola MRF646s in the four-transistor UHF PA.
GE power amplifier reliability, and the Z-Matcher    A guide to why earlier GE PAs can fail when used with reactive loads like a cavity or duplexer.
Any time I see someone complaining they are unable to get rated sensitivity from a 150.8 to 174 MHz MASTR II receiver, I find the fix is usually correcting a low Local Oscillator injection level. The easiest way to insure you get good sensitivity when using a commercial split receiver on 2M is have the crystal company build a crystal for high-side injection. This allows the local oscillator and multiplier chain to work inside its intended range without changing any components. Otherwise, if you have a low-side injection crystal you'll have to do some mods to get the injection level up.
It's a lot easier to just use high side injection.


MASTR II Station Conversion Information:

If your station conversion involves changing from from carrier to tone squelch (or digital tone squelch), or from tone squelch (or digital tone squelch) to carrier squelch then you need to change several jumpers inside the radio AND on the 10 Volt DC regulator card. Don't forget the regulator card jumpers! If you do, you will be chasing your tail for days!
The NHRC-M2/SC Repeater Controller Interface Board for General Electric MASTR II Stations from NHRC A really handy board that plugs into the GE station card cage. (Offiste link)
GE MASTR II Station Conversion Info    by Joseph Hogan W4XE (Offsite link)
Some writeups that Joseph Hogan W4XE put together.
MASTR II Station to Repeater Conversion    by Don Woodward KD4APP
GE MASTR II Station Power Supply Safety Note    by John Holden N7IQV - You'll want to read this writeup on how to fix a serious design / manufacturing error.
Comprehensive modification to the MASTR II 10 Volt Regulator Card for duplex (repeater) operation    by Kevin Custer - W3KKC
How to add a PTT disable switch to a MASTR II 10 VDC Regulator / Station Control Module    by M. Scott Zimmerman N3XCC
Another take on the above that uses a single switch for both forced transmit and transmit disable    by Chuck Kelsey WB2EDV
Pion & Simon Electronics    MASTR II Station Controllers that plug right into the GE card cage! Unfortunately they are going out of business at the end of 2016 but all the support information is here on repeater-builder.
Interfacing the MASTR II Station to an ACC 850 Repeater Controller    Scanned from an old issue of the ACC Notes, developed by the folks at ACC. 315 kB PDF file.
Interfacing a GE MASTR II Base Station/Repeater to an S-COM 7K controller    There's a PDF file at the S-COM web site. (Offsite link)
Oscillator/Multiplier modification for the VHF MASTR II    by Jeff DePolo WN3A and Kevin Custer W3KKC - A mod for improved 2 meter sensitivity.
Comments on the GE MASTR II Power Amplifier, and why they die    by Fred Seamans W5VAY
An experience repairing a GE MASTR II 100w UHF Power Amplifier    by Robert Meister WA1MIK
Repairing the GE MASTR II Station Power Amplifier    by Ray Vaughan KD4BBM
Using the 40-50 MHz 50-100w PA as a Linear Amplifier    by Chuck Schreiber K9VPE
A photo of the intermittent and continuous MASTR II RF Power Amplifier heat sinks
LBI-31056 Version G    Manual for the 19D432500G1 / G2 / G3 standard 10-bit dip-switch style Channel Guard board. 635 kB PDF file.
Here is the tone table
Click here to see a photo showing where the Channel Guard boards are placed in the station.
GE made a proto-board, or perf-board, that was designed to plug into the control shelf. If you can find a source, you want to locate part number 19D417941G1. It's very useful - even if all you want to do is make up a paddle board for connecting external equipment to a base or repeater.
Product Code file #S3 - cracking the combination number on the later generation MASTR II Station cabinet    This is a "Rosetta Stone" document that will help you figure out what you have.
Product Code file #67 - cracking the combination number on the earlier generation MASTR II Station cabinet    This is a "Rosetta Stone" document that will help you figure out what you have.
If your station was shipped with multiple receivers you will need Product Code file #75
If your station started out life as an IMTS station you will need Product Code file #22


MASTR II Mobile Conversion Information:

Step-By-Step GE MASTR II Mobile Duplex Conversion    by Kevin Custer W3KKC
GE MASTR II Mobile Conversion Information page    by Kevin Custer W3KKC
Custom Built MASTR II Mobile and Station Repeater Conversions    from Scott Zimmerman N3XCC
NHRC Repeater Controllers made just for the GE MASTR II    by NHRC, Simply plugs in! (Offsite link)
GE MASTR II Infosite    by Jeff Otterson, and NHRC. (Offsite link)
Oscillator/Multiplier modification for the VHF MASTR II    by Jeff DePolo WN3A and Kevin Custer W3KKC - A mod for improved 2 meter sensitivity.
FM'ing the Phase Modulated MASTR II    by Jeff DePolo WN3A - Converting the PM MASTR II to true FM Modulation
MASTR II Mobile Power Amplifier considerations for reliability    by Ray Vaughan KD4BBM
The elimination of spurious emissions in early MASTR II VHF PA decks    by George Burton K7WWA
MASTR II UHF mobile modifications    by Paul Lorona KB6MIP (Offsite link)
An informative writeup on GE MASTR II cables with part numbers, and connector repair info. 100 kB PDF file.
S.E.I.T.S. MASTR II Information    (Offsite link)
W4XE's MASTR Professional and MASTR II Information    (Offsite link)
NW6H and WB6ZSU's MASTR II to TNC Connection Chart    (Offsite link)
Product Code file #61 - cracking the combination number on the standard MASTR II mobile housing
This is a "Rosetta Stone" document that will help you figure out what you have.
Product Code file #65 Click here for a photo of an "E" housing.
If your mobile radio has dual front ends you will need Product Code file #69


MASTR II Miscellaneous:

How to remove the second front end in a dual front end (DFE) mobile    by Scott Zimmerman N3XCC
Painting a GE MASTR II Mobile With Paint That Almost Matches...    by Phil Heck KE3EI
Duplex Isolation Curves for highband TX with PM vs. PLL exciter (from GE)    103 kB PDF file provided by Jeff DePolo WN3A and Dave Karr KA9FUR
Converting a MASTR Executive II and a MASTR II to 900 MHz    1.4 MB PDF file by Gene Colson W7UVH from CQ VHF June 1999
Another scan of the 900 MHz MASTR Executive II and MASTR II article    217 kB PDF file by Gene Colson W7UVH


MASTR II Highband to 220 MHz Conversions:

A definitive guide to GE MASTR II 220 Rx conversions    by M. Scott Zimmerman N3XCC
Conversion of Highband PLL Exciter to 222 MHz    by Rob Mang K2ROB
WB6RHQ's Highband MASTR II to 222 Modifications    From Southern California's Condor Connection (Offsite link)
The Condor Connections Highband MASTR II to 220 MHz Modifications    (Offsite link)
An Excel spreadsheet to assist in crystal calculations for the 220 MHz MVP conversion
Complete Conversion of the MASTR II multiplier exciter and receiver to 222 MHz    by W4UWH (Offsite link)
How to modify a VHF UHS factory preamp for use in the 220 band    by Scott Zimmerman N3XCC
MASTR II 220 MHz Repeater Conversions from Repeater Builder - the company    222 MASTR II conversions from Scott Zimmerman N3XCC


MASTR II Mobile Suppliers:

Hamblin Communications    Supplier of GE MASTR II mobile radios and parts


MASTR Executive II Information:

. Adding CTCSS (Channel Guard) encode/decode to the MASTR Executive II    55 kB PDF file by Stewart Rabinowitz KE5UT
GE MASTR Executive II Modification and Information Site    by Ray Vaughan KD4BBM (Offsite link)
Product Code file #05 - cracking the combination number on the standard MASTR Executive II station    This is a "Rosetta Stone" document that will help you figure out what you have.
Executive II mobiles are covered by Product Code file #06    (Combination Numbers starting with "R" or "S" followed by "X" or "T" followed by "4" or"5").
High power Executive II mobiles are covered by Product Code file #13    (Combination Numbers starting with "R" or "S" followed by "X" or "T" followed by "6" or"7").
RCC and IMTS mobiles are coverd by Product Code file #18    (Combination Numbers starting with "CC", "XC", "YC", "CS", "XS" or "YS").
Executive II-based Mobile Repeaters are covered by Product Code File #82    (Combination Numbers starting with "MVR", "EVR", "DVR", or "RVR").
MASTR Executive II VHF mobile modifications    by Paul Lorona KB6MIP (Offsite link)
MASTR Executive II UHF 40w Power Amplifier modifications    135 kB PDF file by Harold Reasoner K5SXK
Improves operation in the 420-440 MHz range. (Originally a powerpoint presentation.)
Executive II I-F alignment procedure    by Patrick M. Conway WA6JGM - IF alignment for MASTR II, Executive II, and Custom MVP radios.
Running D-STAR on a MASTR Executive II radio    by Ron Wright N9EE. D-STAR is added to a mobile radio that has been converted to a full-duplex repeater.


MASTR Professional Information:

Product Code file #31 - cracking the combination number on the MASTR Professional mobile housing    This is a "Rosetta Stone" document that will help you figure out what you have.
Product Code file #32 - cracking the combination number on the MASTR Professional Station cabinet    This is a "Rosetta Stone" document that will help you figure out what you have.
KA1OKQ's Modification of the MASTR Professional ER41C VHF receiver to 220 MHz (Offsite link)
WB4TUR's MASTR Professional Page (Offsite link)
Modify an ER42 UHF receiver for 220 MHz    1.2 MB PDF file by Gary Hendrickson W3DTN. Provides instructions that cover both the 406-420 and 450-470 MHz units.


MASTR III Station Information:

Product Code file #SX - cracking the combination number on the standard MASTR III station
This is a "Rosetta Stone" document that will help you figure out what you have.
The MASTR III Station programming cable is a straight-through DB9 serial cable. Connect either to the Data Port on the front of the repeater or the DB-9 connection on the rear of the interface board.
Thoughts on MASTR III to ham conversion    by Paul Robertson N2XZF
GE MASTR III Module Number Band Decoder Chart    by Matt Krick K3MK
Converting the GE VHF MASTR III 150-174 MHz Repeater to 144-148 MHz Amateur Operation    by Matt Krick K3MK
Converting the GE UHF MASTR III 403-430 MHz Repeater to 440-450 MHz Amateur Operation    by Matt Krick K3MK
Interfacing External Repeater Controllers to GE MASTR III Stations    by Matt Krick K3MK
MASTR III Station Parts and Accessories Quick Reference Guide    1.8 MB PDF file by Matt Krick K3MK


Delta Information:
Anybody want to contribute a few Delta, Delta S, or Delta SX photos? (exterior and interior)
GE Delta Information    by Dave Kaar KA9FUR (Offsite link)
Converting and programming the Delta series radio.
More GE Delta Information    from a group of New England hams. (Offsite link)
Supplemental GE Delta Information    by Mike Morris WA6ILQ
Len Kreyer can program Delta radios. Contact him via e-mail.


RANGR Information:
Anybody want to contribute a few photos? (exterior and interior)
Anyone what to do an overview article?
Converting the low-band GE RANGR to 6 meters    by Gary L. Peterson, NZ5V (a work in progress)
When using the TQ2310 Suitcase Programmer (LBI-31229) to program RANGR radios refer to LBI-31630.
Len Kreyer can program RANGR radios. Contact him via e-mail.


MLS and MLS-II Information:     (sometimes referred to as the MLS-1 and MLS-2)
There is a yahoogroup oriented towards the MLS at http://groups.yahoo.com/group/GE_MLS. Note that it's "GE(underscore)MLS".
An Overview of the MLS Mobile Radio by Robert Meister WA1MIK.
Comparison with the GE MLS-II models. Photos, features, etc. Please read the MLS-II Overview (below) first.
Using MLS Mobile Radios in Repeater Service by Robert Meister WA1MIK.
Details of where you can find the required signals for almost any repeater controller.
VHF MLS Radio circuit board X-ray views from the various LBIs scanned by Robert Meister WA1MIK. 1.5MB PDF file.
After acquiring an excellent quality, original, complete Combination Maintenance Manual: LBI-31764A, I scanned the X-ray view pages in glorious color. Eric WB6FLY scanned all the LBIs to PDF files and these have been installed in the LBI Library.
An Overview of the MLS-II Mobile Radio by Robert Meister WA1MIK.
Model numbers, comparison with the Motorola MaxTrac radios, photos, features, etc.
Replacing MLS-II Mobile Radio Power Supply Caps by Robert Meister WA1MIK.
If your radio has an annoying 100 Hz hum coming out of the speaker all the time, this may be the fix for it.
Using MLS-II Mobile Radios in Repeater Service by Robert Meister WA1MIK.
Details of where you can find the required signals for almost any repeater controller.
MLS/MLS-II Accessory Connector Issue by Robert Meister WA1MIK.
You can easily insert an accessory connector wrong, which could be disastrous. This article provides an inexpensive fix to the problem.
MLS/MLS-II Mobile Radios Secrets by Robert Meister WA1MIK.
The MLS requires a TQ2310 suitcase programmer, which is rare and hard to use. However there are alternatives. This article explains the layout of the personality data stored in the radio's EEPROM, so if you have an EEPROM burner you should be able to successfully modify the data and reprogram the radio.
TQ-2310 Programming Instructions    1 MB PDF file
This is the instruction manual for the MLS programming software found in the TQ-2310.
TQ-3342 Programming Software Guide    2.2 MB PDF file
This is the instruction manual for the MLS-II programming software, direct from Ericsson.
The MLS radio can be forced to always be in the "ON" condition by adding a small jumper wire across the Power On relay's contacts or the SysCon1 connector pins 1/2 to pins 3/4. See the "Using MLS Mobile Radios in Repeater Service" article above for more details.
The MLS-II radio can be forced to always be in the "ON" condition by adding a small jumper wire from the incoming A+ terminal to the input (left) pin of IC501, the AN1541 9V regulator chip on the board where the DC power cable enters the radio. This tip is courtesy of Allan Perrins WB6PHE. See the "Using MLS-II Mobile Radios in Repeater Service" article above for more details.
I discovered that M4.7x12mm screws fit the threaded mounting holes on the sides of the radios. M3.5x6mm and M3.5x10mm screws fit the threaded circuit board mounting holes inside the radios.
Len Kreyer can program MLS and MLS-II radios. Contact him via e-mail.
Repeater-Builder does not have any programming software. It can probably be found "out there" on the web; better yet, ask on the the GE mailing list.

From a private email: GE had a problem with electrolytic capacitors failing and leaking, especially in mobiles in hot parts of the country (like southern Texas in the summer). Many GE mobiles (including the MLS series) had several electrolytic capacitors on the sloping front panel boards. When these leaked the corrosive electrolyte would eat up the copper traces, including the copper plating in the pass-through holes in the PC boards (the plating in the holes was too thin). In most cases the boards were just replaced. The traces on the boards could be repaired with 30 or 32 gauge wire soldered onto what was left of the traces but the only cure for the holes was to insert a piece of thin wire in each plated hole and solder both sides. When you replace the caps you will probably want to use caps with a 105C temperature rating.


MPA Information:
The MPA came out around 1988 or 1989 and was dropped in 1996. It was the successor to the MPD. It is a programmable radio.
There is a yahoogroup oriented towards the MPA at http://groups.yahoo.com/group/GE-MPA. Note that it's "GE(hyphen or dash)MPA".
Anybody want to contribute a few photos? (exterior and interior) and some information on the series?
How to Use the M-PA Radios on the 902-928 MHz Amateur Band    168 kB PDF file by Mark A. Cobbeldick KB4CVN
This is a compilation of the experiences of long-term efforts by several hams, including: Doug Bade KD8B (Creator of the modified software to support 902-928 MHz and dozens of hours of testing), Gary Peterson NZ5V (Reviewing the data and testing methods) and John Belstner W9EN. This information applies equally to the following radios: M-PA, MTL and P400. The GeNet 900 model of the MTL is not supported due to the modem/clock differences.


M-RK Information:

Anybody want to contribute a few photos? (exterior and interior) and some information on the M-RK series?
A schematic of the M-RK programming cable


MVS Information:       Front panel photo

Anybody want to contribute a few more photos? (exterior and interior)
VE3FYN has some information here. (Offsite link)
KD4BBM has some notes on the MVS as well (Offsite link)
Ralph Hogan W4XE has some good MVS notes, some photos, interfacing information and pointers. (Offsite link)
Converting a VHF MVS radio to 220 MHz    7.6 MB PDF file by Matt Krick K3MK
Supplemental MVS Information    by Mike Morris WA6ILQ


Century II Information:

Anybody want to contribute a few photos? (exterior and interior)
Anyone what to do an overview article?
GE Century II highband to 2 meter conversion    Converting the highband Century II to the 2 meter ham band


Custom MVP:
The Custom MVP (commonly called the MVP) is essentially a dash-mount low power MASTR II.

Step By Step GE Custom MVP Conversion Site    by Kevin Custer W3KKC
GE MVP Bandsplit Modification    by Matt Lechliter W6KGB
MVP to Repeater Conversion    by Bob Dengler NO6B
Installation instructions for Parkinson RP3A Repeater-Controller with GE UHF MVP mobile radio    580 kB PDF file
WB6RFW's GE MVP Radio Modifications (Offsite link)
A VHF MVP/Executive II 222 MHz Conversion    From Southern California's Condor Connection. (Offsite link)
UHF MVP TX and RX Tuning Instructions    by Bob Dengler NO6B
Tune Up Instructions for the MVP and MASTR Executive II     VHF Receiver   and   VHF Exciter   and   UHF Exciter
Custom MVP I-F alignment procedure    by Patrick M. Conway WA6JGM
IF alignment for MASTR II, Executive II, and Custom MVP radios.
Some GE MVPs have shown up with a controller board made by Parkinson inside the case.
The system manual is LBI-32772a 242 kB PDF file and the board manual is LBI-32792 749 kB PDF file.
Custom MVP Mobile Repeater Conversions from Scott Zimmerman N3XCC   GE conversions from Repeater Builder (the company).
Temperature Compensation Capacitor information for 5C ICOMs    13 kB PDF file provided by Chuck WB2EDV
Converting a UHF 20/35w PA to 5 watts for link transmitter use    by Doug Crompton WA3DSP
Regarding UHF units: While there are duplex conversions of the MVP that will enable its use as a repeater or as a link radio, please understand that the MVP was designed as a 5, 20 or 35w mobile, and was designed for an intermittent duty. The 35w version has all three RF power amplifier stages (the pre-driver, driver and final), the 20w has two (the pre-driver and the driver), and the 5w has only one stage (the pre-driver). A common modification is to take a heat sink intended for a P4 CPU and adapt it to the back of the radio. Even the driver transistor gets hot and needs additional heat sinking. So if you intend to run an MVP with any kind of duty cycle (i.e. as a link or as a repeater) you really need a heat sink with a fan. And use a real metal ball bearing fan, not a sleeve or bushing fan.


Monogram Information:

Programming the Monogram and Maxon mobile radios    by Scott Lichtsinn KBØNLY
Maxon SM-4450 UHF Synthesized Mobile Radio Service Manual    19.8 MB PDF file courtesy of Don K8ZGW
This radio is identical to the GE Monogram series; it just has a different name.
We have zero info on the Monogram series other than at least one of them was a rebranded Maxon SM4000 series radio. If you have one of these then look on the web for the Maxon SM4000 series information and programming software.


PCS Information:

Anyone want to do an overview article?
Converting a VHF PCS radio to 220 MHz    1.8 MB PDF file by Matt Krick K3MK


Phoenix and Phoenix SX Information:

Phoenix squelch-controlled audio amplifier    15 kB PDF file by John J. Riddell VE3AMZ
Originally used for a packet interface, this general-purpose LM386 amplifier uses a novel gating feature.
Phoenix remote channel selection modification    by Joel Huntley WA1ZYX. (Offsite link)
Interfacing the Phoenix to a packet TNC    by Ray Vaughan KD4BBM (Offsite link)
While the article is packet oriented, the info will be useful to anyone that needs to interface a Phoenix to a repeater controller - as a control receiver, point-to-point link, remote base, whatever.
KG4LNE's Phoenix Resources Page    by Robert Starr KG4LNE (Offsite link)
When using the TQ2310 Suitcase Programmer (LBI-31229) to program Phoenix radios refer to LBI-31262.
Len Kreyer can program Phoenix radios. Contact him via e-mail.
The screws that are used to hold the mounting bracket to the radio housing are metric, M4-0.7x10, which translates to M4 diameter, 0.7mm thread pitch and 10mm (1cm) long. Thanks to Tedd Doda, VE3TJD for the info.
Anyone want to do an overview article?


Frequency Agile Modifications for Commercial Radios:

GE Phoenix, RANGR, Delta, and Ramsey FX Series    by Joe Burch K3JLS (Offsite link)
Modifying the S990 head for direct frequency entry    by David Hopper WD4JKH (Offsite link)
The 9xx heads will work with all Delta S, Delta SX and RANGR series radios.


Trivia, Miscellaneous Information, and Datasheets:

GE MASTR Trivia Question    by Mark A. Cobbeldick KB4CVN
Shure 890TT mobile DTMF microphone    975 kB PDF file
Also goes by M/A-Com model numbers 344A4611P1, KRY1011637/3, KRY1011654/10. Possibly for the Orion product line.
Radio Service Training Seminar (1969)    938 kB PDF file
General procedures for testing and measuring mobile radio performance. While primarily aimed at older (tube) equipment, the techniques are equally useful for today's modern radios.
GE C800 and C900 Control Heads Sales Brochure    3.3 MB PDF file
1977 vintage MASTR II and Executive II Mobile Radios.
GE MASTR Executive II Sales Brochure and Specs    3.1 MB PDF file. 1978 vintage.
GE MASTR Base Station and Control Equipment Sales Brochure    3.9 MB PDF file. 1978 vintage.
GE MASTR Executive II VHF Base Station Specs    2.1 MB PDF file. 1978 vintage.
GE Power Call and Power Call/Siren Sales Brochure and Specs    2.5 MB PDF file. 1977 vintage.
GE MASTR Remote Control Consoles Sales Brochures and Specs    3.9 MB PDF file. 1978 vintage.
Includes Tone and DC remotes, DESKON II, and Command Control Centers.
GE MASTR PE Personal Radio Sales Brochures, Part 1 of 2    3.1 MB PDF file. 1978 vintage.
Includes MPR, MVP, Porta-Mobile II, and accessories.
GE MASTR PE Personal Radio Sales Brochures, Part 2 of 2    3.2 MB PDF file. 1979 vintage.
Includes MASTR Personal, MASTR MVP Personal, Accessories, POWR MASTR add-on power amplifiers, MPR Personal.
GE MASTR II mobile radios Sales Brochure and Specs    2.8 MB PDF file. 1978 vintage.
Includes MASTR II M, MASTR II E.
GE MASTR II repeater and base stations Sales Brochure and Specs    1.3 MB PDF file. 1978 vintage.
Includes MASTR II M, MASTR II E.


Test Sets and Tuning Tools:

Information on GE Test Sets and Tuning Tools



The Repeater Builder's web site does not evaluate the accuracy of materials created by persons beyond its control or supervision. Therefore, although this site links to many additional web sites, The Repeater Builder's site is not responsible for the availability of or the accuracy of any materials contained within those web sites.

All of the GE radio models mentioned on this page are most likely registered trademarks of General Electric / Ericsson / Com-Net Critical Communications / M/A-Com / Tyco / Harris.
GE image used with permission.

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This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.