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MTX9000 B3 programming- stretch down to mid 800mhz?

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NrrvGaaz

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Mar 13, 2011
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I work for a PS agency that uses Motorola Type 2 Smartnet trunking for statewide ops and conventional regional repeaters at fixed sites. I am also a HAM and I want to dabble in 900mhz. I recently acquired an MTX9000 B3 unit in working order. I have seen a couple of good How To-s describing how to open up the 900mhz HAM segment of the band in these radios. I would also like to open up my work site repeater and the trunk network as well if I can. Anyone know whether these 900mhz units can stretch down to mid 800mhz with a codeplug hack?
 

fineshot1

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Sep 17, 2004
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NJ USA (Republic of NJ)
I work for a PS agency that uses Motorola Type 2 Smartnet trunking for statewide ops and conventional regional repeaters at fixed sites. I am also a HAM and I want to dabble in 900mhz. I recently acquired an MTX9000 B3 unit in working order. I have seen a couple of good How To-s describing how to open up the 900mhz HAM segment of the band in these radios. I would also like to open up my work site repeater and the trunk network as well if I can. Anyone know whether these 900mhz units can stretch down to mid 800mhz with a codeplug hack?

No - they won't go down that far. Even if you could do a rss hack the VCO will not lock
that far away from the intended 900 freq range.

You will need an MTX8000 for that lower freq range.
 

gary123

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Sep 11, 2002
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not only the VCO but the RF amp will not work (it falls off rapidly in the 925 area). The same for the rx front end although it isnt as noticable.

Unfortunatly for 800meg you will need a 800 meg unit. There are lots of 800 MTSX series untis available.
 
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