Motorola GP 300 (GP300 GP-300) transceiver mods reviews programming software and diagrams

   
 
ham | what is new | links
 Welcome to Www.Hampedia.net  submit to reddit
29 March 2024, 16:25 UTC 


SDR


ELAD
SDRplay

Transceivers


Kenwood
Midland
Yaesu
Alinco
Icom
Other

Antennas


M2
Par
Gap
Sirio
Araki
Maco
Nil-Jon
Maldol
Comet
Hustler
Nagoya
Watson
Hy-Gain
Dressler
Cue Dee
Solarcon
Diamond
Cushcraft
Quicksilver
Moonraker

Power supplies


Powerbox
Kenwood
Diamond
Samlex
Mascot
Daiwa
Yaesu
Alinco
Icom
H&H

Rotators


M2
CDE
Yaesu
Create
Kenpro

Antenna tuners


MFJ
LDG
SGC
Icom
Yaesu
Mizuho
Dentron
Kenwood
Sommerkamp
Barker & Williamson

Repeaters


GME
Icom
Zodiac
Kenwood

Transverters


Microwave Modules
Tokyo Hy-Power
SSB Electronics
Tecnostudi
Kenwood
Yaesu
Minix

Meters


Diamond
Comet
Bird
MFJ

Ham resources


Propagation:
  Sporadic E skip (Es)
  Backscatter
  Tropo
  Meteor Scatter (MS)
  F2 Skip
  Aurora
  Trans-equatorial scatter (TE)
  Lightning scatter (LS)

Motorola GP 300 (GP300 GP-300)
Motorola GP 300
Programming interfaces schematics for Motorola: Motorola MAX232 programming interface, Motorola transitor programming interface
Programming software for Motorola GP 300 (GP300 GP-300) :
 Motorola GP 300 Dos RSS programming software (R07.00.00)
 Motorola GP 350 Dos RSS programming software (R08.01.00)
Schematics for Motorola GP 300 (GP300 GP-300) :  Motorola GP 300 diagram

Mods for Mods for Motorola GP 300 (GP300 GP-300) :
    Motorola GP 300 (GP300 GP-300) gp300/5 Tone out of band
    Motorola GP 300 (GP300 GP-300) VHF hi-band portable
    Motorola GP 300 (GP300 GP-300) Out of (any) band for HT50 / P100/ P110 / GP300 / GM300
    Motorola GP 300 (GP300 GP-300) TX out of band limits
    Motorola GP 300 (GP300 GP-300) How to program the radio
    Motorola GP 300 (GP300 GP-300) Radio Programming, 8 to 16 channel expansion
    Motorola GP 300 (GP300 GP-300) RIB-IVG (Programming Interface MkII)

Motorola GP 300 (GP300 GP-300) technical specifications :  Motorola GP 300 (GP300 GP-300) technical specifications

Motorola GP 300 (GP300 GP-300) Radio Programming, 8 to 16 channel expansion

Introduction.

The Motorola GP300 can be re-programmed quite easily to allow use on our Amateur Radio bands. The radio is made in both a VHF and UHF versions, and makes an excellent 2mtr or 70cms portable radio.

Most of the radio's I have worked on have originally been 8 channel units. These can be modified to operate on 16 channels quite easily.

The programming interface can be made for a low cost. All it consists of is a RS232 to TTL level converter, that connects between the serial port of your PC and the radio.

Amateur Radio Conversion.

The radio requires the Motorola Software which can be found if you ask around or search for it on the FTP sites on the Internet. If you can't find it then try your local Motorola dealer who should be able to help at a small cost.

You also have to make an interface, or purchase one.

To program the radio onto the Amateur band, you can find some versions of software that have been hacked into allowing frequencies to be entered to bring the radio into the amateur bands which normally are just bellow the original working frequency. However this depends on your version of software, if it's a un-hacked version then you have to press the key down when entering the frequency. You must release the key when entering the decimal point. For example to program 433.500MHz you will enter the following: $££.%)) on a English layout keyboard. (This is 433.500 with the held down. Fill all of the 0's in the frequency field. This example is the same for both the VHF and UHF GP300's.

16 Channel conversion. (for 8 channel radio's only)

To program the radio for 16 channels you need to first of all, pull the channel selector knob off the radio. On the underside of the channel selector knob you will see a small black "Stop". Cut this off with a sharp knife and replace the knob. You will now find the radio then switches 16 positions instead of the original 8 channels.

You then need to "Hack" a file called GP300.MDF with the help of a Hex editor such as Hex Workshop. The file you need to modify is called GP300.MDF and can be found in the main directory of the Motorola software. Keep a backup of your original GP300.MDF file, just in case you make a mistake.

I have made a small video that shows the Hex Workshop screen during the modification. This should help you understand the procedure of editing the file which when complete will give you 16 channels. Click below to download.

Procedure

  1. Get a copy of Hex Workshop.

  2. Start the Hex Workshop program and open the file GP300.MDF to begin editing.

  3. Go to "Tools", and the "Generate Checksum".

  4. Make sure "Entire Document" and also "Decimal" are ticked. Then press "Generate".

  5. Look in the "Checksum-16" box, in my version of software for example, this results in a checksum of 53454 (yours may be a different number depending on the version of Motorola software)

  6. Write this number down, as you need it later.

  7. Press "Cancel" to return to the main window and your next step.

  8. Go to "Edit" and then "Find". A pop-up window appears.

  9. You need to enter the model number of your radio. For e.g. P93YPC00D2AB.

  10. When you enter the model number leave off the last two letters(AB on my radio).Make sure "ASCII" is ticked.

  11. When you press "Find Next", you will see your model number highlighted.

  12. If you count 8 numbers after the highlighted section, you should see the number "08" as long your radio is originally a 8 channel set.

  13. Edit the "08" to "10" (note 10 in Hex is equal to 16 in decimal).

  14. You now need to edit the start of the program, to allow the software to run.

  15. In the first few lines look for a Hex number that you can easily take away 8 from.

  16. In my software at address 00000040 you will see the number "78" on the right.

  17. Edit this to be "70".

  18. Now you must do a final checksum and make sure it equals the original value.

  19. If this is the same, then replace you original file with the modified file.

  20. Try to reprogram your radio with the extra 8 channels to give you 16 channels.





More Motorola Transceivers
    Motorola GP 88 (GP-88 GP88) service manual and specs
    Motorola GP 300 (GP-300 GP300) service manual and specs
    Motorola GP 300 select 5 (GP-300 select 5 GP300 select 5) service manual and specs
    Motorola GP 300 crek (GP-300-crek GP300crek) service manual and specs
    Motorola GP 320 (GP-320 GP320) service manual and specs
    Motorola GP 340 (GP-340 GP340) service manual and specs
    Motorola GP 350 (GP-350 GP350) service manual and specs
    Motorola GP 360 (GP-360 GP360) service manual and specs
    Motorola GP 380 (GP-380 GP380) service manual and specs
    Motorola GP 600 (GP600 GP-600) service manual and specs
    Motorola GP 640 (GP640 GP-640) service manual and specs
    Motorola GP 680 (GP680 GP-680) service manual and specs
    Motorola GP 900 (GP900 GP-900) service manual and specs
    Motorola GP 1280 (GP1280 GP-1280) service manual and specs
    Motorola GR 300 (GR300 GR-300) service manual and specs
    Motorola CP 50 (CP-50 CP50) service manual and specs
    Motorola PTX 600 (PTX600 PTX-600) service manual and specs
    Motorola MCX 600 (MCX600 MCX-600) service manual and specs
    Motorola GM 300 (GM-300 GM300) service manual and specs
    Motorola GM 340 (GM-340 GM340) service manual and specs
    Motorola GM 350 (GM-350 GM350) service manual and specs
    Motorola GM 360 (GM-360 GM360) service manual and specs
    Motorola GM 380 (GM-380 GM380) service manual and specs
    Motorola GM 600 (GM-600 GM600) service manual and specs
    Motorola GM 640 (GM-640 GM640) service manual and specs
    Motorola GM 660 (GM-660 GM660) service manual and specs
    Motorola GM 900 (GM900 GM-900) service manual and specs
    Motorola GM 950 (GM950 GM-950) service manual and specs
    Motorola GM 1200 (GM1200 GM-1200) service manual and specs
    Motorola GM 1280 (GM1280 GM-1280) service manual and specs
    Motorola M 10 (M-10 M10) service manual and specs
    Motorola Radius M 100 (M-100 M100) service manual and specs
    Motorola M 120 (M-120 M120) service manual and specs
    Motorola M 130 (M-130 M130) service manual and specs
    Motorola M 208 (M-208 M208) service manual and specs
    Motorola P 040 (P-040 P040) service manual and specs
    Motorola P 50 (P-50 P50) service manual and specs
    Motorola P 080 (P-080 P080) service manual and specs
    Motorola P 100 (P-100 P100) service manual and specs
    Motorola P 110 (P-110 P110) service manual and specs
    Motorola P 110 with 8 channels (P-110 with 8 channels P110 with 8 channels) service manual and specs
    Motorola P 200 (P-200 P200) service manual and specs
    Motorola P 200LB (P-200LB P200LB) service manual and specs
    Motorola GX 300 (GX300 GX-300) service manual and specs
    Motorola GX 4800 UT (GX4800UT GX-4800 UT) service manual and specs
    Motorola SP 50 (SP-50 SP50) service manual and specs
    Motorola SM 50 (SM-50 SM50) service manual and specs
    Motorola SM 120 (SM-120 SM120) service manual and specs
    Motorola HT 50 (HT-50 HT50) service manual and specs
    Motorola HT 600 (HT-600 HT600) service manual and specs
    Motorola HT 1000 (HT-1000 HT1000) service manual and specs
    Motorola MT 1000 (MT-1000 MT1000) service manual and specs
    Motorola MT 2000 (MT-2000 MT2000) service manual and specs
    Motorola MTX 8000 (MTX-8000 MTX8000) service manual and specs
    Motorola MTX 9000 (MTX-9000 MTX9000) service manual and specs
    Motorola MTS 2000 (MTS-2000 MTS2000) service manual and specs
    Motorola JT 1000 (JT-1000 JT1000) service manual and specs
    Motorola VISAR service manual and specs
    Motorola 35HMC Centro,micro EVA,micro TRC,micro EZA service manual and specs
    Motorola GTX series (900Mhz) service manual and specs
    Motorola MaraTrac service manual and specs
    Motorola MaxTrac Lab service manual and specs
    Motorola Waris service manual and specs
    Motorola Pro Series(Pro 5150 and others) service manual and specs
    Motorola XTN-446 (XTN 446 XTN446) service manual and specs

CB Equipment


President
Midland
Uniden
Zodiac

 Power amplifiers


Beko
Icom
Alinco
Drake
Yaesu
Daiwa
Collins
Kenwood
DanAmps
Ameritron
Autophon
Eto/Alpha
Command Technologies
E.F.Johnson
Dentron Radio Co.

FRS/GMRS


Bell
GPX
ENC
Tekk
Icom
Sony
Alinco
Drake
Cobra
Maxon
Vertex
Conair
Uniden
Jenson
Ranger
Midland
Whistler
Magnum
Unwired
Coleman
Motorola
Audiovox
Memorex
Columbia
Samsung
Standard
Kenwood
Cherokee
Panasonic
Freetalker
Vtech Vtalk
RadioShack
Fanon Courier
Sharper Image
General Electric
Oregon Scientific

PMR446


Sommerkamp
FreeQuency
Goodmans
Kenwood
Lafayette
President
Binatone
Motorola
Multicom
Albrecht
Maycom
Topcom
Xtreme
Ondico
Telcom
Maxon
Vertex
Zodiac
Yaesu
Cobra
Alinco
Icom
Alan
ITT