Motorola CDM1250 (waris) Which RSS version do I use ??

[rbluesky]

Hi All I'm looking on E-bay for a CDM1250 45 watts for ham use on UHF I have the cable and RSS
here is are version i have R06.04.00
R06. 12.05_AA
R06.09.05_AA .
R06.12.09-AA

Which one is the best for setting up ham repeaters Wide band Will i have to hex EDIT the .EXE file to
go down to 440 Mhz ? If this has already been disgusted can you point me to the Messages on this forum
Also which version is the eaiest to Hex edit to HAM UHF Band
thank you for any help

 

[tweiss3]

I don't have an answer on the hex edit, but 6.12.05_AA was the last wideband version.

 

[daugherh]

I'm not sure on HEX editing; however there are two variants of CDM1250 for UHF. One covers 403-470 MHz (covers HAM band) and the other covers 450-512 MHz (would probably needed edited.)

If you can find a 403-470 split model, you would be good to go!

 

[n3obl]

6.12.05 is the last wideband version... Just stick with that. You want an R split mobile to cover 403-470 mhz frequencies. It is possible to use a program called chirp to modify a 450-520 radio to go down to 440mhz.

 

[mmckenna]

One issue with stretching a 450-520 radio down to 70cm is that if you go too far, VCO can unlock. Also, the filtering might need adjustment if you get too far down into 70cm, and that requires a service monitor.

Much easier to just get the 403-470 model, even if it costs a bit more.

 

[rbluesky]

6.12.05 is the last wideband version... Just stick with that. You want an R split mobile to cover 403-470 mhz frequencies. It is possible to use a program called chirp to modify a 450-520 radio to go down to 440mhz.

This is very interesting !! using chirp software never thought of that THANKS

 

[rbluesky]

I'm not sure on HEX editing; however there are two variants of CDM1250 for UHF. One covers 403-470 MHz (covers HAM band) and the other covers 450-512 MHz (would probably needed edited.)

If you can find a 403-470 split model, you would be good to go!

well the ONLY reason I would want to go form a HIGH split is I an use the radio for both Ham and asa scanner for SOME police and fire
So hex editing from either it's 450 or from 470 down to 440 would be a better choice ! if it's possible
I really dont think going from 470 to 440 wil work the VCO just wont lock to far of a spread ! any thoughts

 

[rbluesky]

I don't have an answer on the hex edit, but 6.12.05_AA was the last wideband version.

OK thanks well that's the version that I will use and Hexedit then OR just getting a 403 to 470 radio as a STABLE radio to use in the HAM band
with out Chinese SPURS (harmonics) in the transmit PURITY is the ONLY way to transmit !!! RIGHT