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  • Model Breakdown, identification

    Model Breakdown

    Mobiles

    AA M 25 K H F 9 AA 8 A N
    Internal Use Radio Type Model Series Bandsplit Power Display Channel Spacing Protocol Feature Level Model Revision Model Package
    AA Internal Use M Mobile 25 Model Series B 29.7-36 MHz H 1-25 W A No Display, No Keypad 9 Programmable AA Conventional 1 4 Frequency A Original Revision N Standard Package
    LA Internal Use C 36-42 MHz K 25-40 W C No Display, Basic Keypad DU LTR 2 64 Frequency
    D 42-50 MHz D 1 Line Display,Limited Keypad 5 128 Frequency
    K 136-174 MHz F 1 Line Display, Standard Keypad 8 160 Frequency
    R 403-470 MHz N 4 Line Display, Enhanced Keypad
    S 450-512 MHz

    Below is a partial model breakdown chart for the HT/PRO Series portable radios:

    LA H 25 K D C 9 AA 2 A N
    Internal Use Type of unit Model Series Frequency Band Power Level Physical Package Frequency Spacing Protocol Feature Level Model Revision Model Package
    AA Internal Use H Portable 25 Model Series B 29.7-42 MHz C 3W C No Display 9 Programmable AA Conventional 2 4 Frequency A Model Revision N Model Package
    LAInternal Use &nbsp &nbsp C 35-50 MHz D 4-5W H 1 Line Display &nbsp CK MPT 3 16 Frequency &nbsp &nbsp
    &nbsp &nbsp &nbsp K 136-174 MHz E 6W N 4 Line Display &nbsp DU LTR 6 128 Frequency &nbsp &nbsp
    &nbsp &nbsp &nbsp R 403-470 MHz &nbsp &nbsp &nbsp &nbsp 8 160 Frequency &nbsp &nbsp
    IC-9100, IC-7100, AT-180, Yeasu G-5500, GS-232B, JT222M, HRI-200 Wires-X, Astron RM-60M, DR-1X, SCOM 7330, Wouxun KG-UV950P, TYT TH-9000D, Motorola CDM 1250, Stepper IR DB11 Antenna

  • #2
    GM300 Model Numbers:

    The first six characters are pretty much standard Motorola convention. The IF frequency is usually 45.1 MHz but if you have multiple radios near each other, this can cause interference, so you can optionally order the radio with an alternate IF frequency.

    M: dash 0: 1-10 3: 136-174 GM: ? C: 45.1
    3: 10-25 4: 403-520 XQ: ? R: 45.3
    4: 25-45 XV: ?
    The XV-series seems to all be 1 channel radios. The XQ-series seems to be all 2 channel radios. The GM-series can be 2, 8, or 16 channel radios. The XV and XQ may be used by the M10, M120, and M130 radios.

    The second six characters provide a lot of useful information about the capabilities of the radio and the boards contained within it.

    0: 12.5 0: 8 C: Expanded 1: 136-162 A_
    2: 20/25/30 9: 16 D: Masked 1: 403-430
    2: 146-174
    3: 438-470
    4: 465-490
    5: 490-520
    A typical model number would be M44GMC09C3A_. This is a 40 watt, UHF radio, 45.1 MHz IF, narrow spacing (12.5 kHz), 16 channels, expanded logic board, 438-470 MHz band.


    The third and tenth characters of a GM300 family model number are translated as follows:
    3 1 136-162 This is low split high band, sometimes called a "range 1" radio. It's ideal for amateur radio 2M, VHF commercial and public safety, for Civil Air Patrol and weather. Note that CAP is going to nationwide narrowband in the 2009-2011 time frame, and some geographic areas are fully narrowband as I type this, so wideband-only radios are a VERY poor investment for CAP frequencies.
    3 2 146-174 This is high split high band, sometimes called a "range 2" radio and is the most common in VHF. Yes, they will work down at 144-145 MHz just fine, but not a whole lot lower (i.e. I wouldn't try anything below 144 MHz).
    4 1 403-430 This is low split UHF, sometimes called "range 1", or "government range". The notes in the Radius LRA section above on this range apply here as well.
    4 2 Invalid combination of numbers.
    4 3 438-470 This is sometimes called a "range 3" radio and is the most common in UHF. Ideal for amateur radio UHF, commercial, public safety and GMRS.
    4 4 465-490 This is sometimes called a "range 4" radio. It will do 470 MHz and 480 MHz public safety, might be pushed to GMRS (depends on the individual radio, most receivers will make it to 462 MHz), otherwise it's only good for parts.
    4 5 490-520 This is sometimes called a "range 5" radio. Unless you have some local public safety frequencies on or around 507-509 / 510-512 MHz it's a doorstop, or only useful for parts.
    IC-9100, IC-7100, AT-180, Yeasu G-5500, GS-232B, JT222M, HRI-200 Wires-X, Astron RM-60M, DR-1X, SCOM 7330, Wouxun KG-UV950P, TYT TH-9000D, Motorola CDM 1250, Stepper IR DB11 Antenna

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