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

   
 
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05 December 2024, 5:20 UTC 


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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) VHF hi-band portable

1) To convert 8Ch. unit to 16Ch unit. These are the 'same' radio. Only the 'encoder' is different. The 8 Ch encoder knob has a small black plastic skirt' with a 'tag'. Remove the 'skirt' component and file-off the tag.
The encoder now rotates through 16 channels. A GP300 16 Ch. 'Escucheon' is available to order as a spare part/replacement. This is the plastic screen-printed' plate which sticks on the top of the radio showing the various controls.

2) To bring down the frequency coverage below 146 mHz - so as to cover the amateur 2 meter allocation. This is done when using the RIB (radio interface box/line) and a PC programme of Motorola's. When typing in the required amateur (145mHz) frequencies in the RX or Tx windows...the radio refuses to accept 'out of band' freq's. To overcome this...use the PC keyboard 'Shift key' when entering the 'NUMERALS' only. This will display as the secondary characters of the key pressed. Don not worry - this is normal. Then, when entering the decimal point...release the 'Shift key' and enable the 'full stop',(dot). Then...to enter the remaining numerals which follow the decimal point...engage the 'Shift key' again....to complete the entry. Having done this....press 'Enter' to lock-in the new frequency. Some re-aligning may be necessary to peak the radio onto the lower area amateur allocation frequencies. Good luck.





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