Motorola CDM750 6 Meter Deviation

[skyler440]

I have a Motorola CDM750 I am attempting to get in the 6-meter ham band. The VCO locks to around 53.5MHz which is good enough for me to use for my main purpose at 52.525 simplex.

I am trying to get the deviation set right. The max deviation past 51MHz decreases from 5KHz at 50MHz to about 1.5-2KHz at 52.525. I have changed all of the tuning piers with the W9CR waris chirp script, so I can get the TX power stable across the band, but I am unable to find any setting in the tuner software for deviation.

Anybody have any experience with the CDM750 for ham bands, in particular 6-meter? Is it possible to modify in only software, or is a hardware modification required as well?


Thank you,
Skyler KD0WHB

[KitN1MCC]

The CDM on lowband are known to burn out

[skyler440]

The CDM on lowband are known to burn out

What does that have to do with deviation though?

[AD0JA]

I had this issue with a 6m lowband 1250 as well. Never could figure out how to fix it, I read the BSM and re-aligned everything in the tuner but no luck. Gave it back to its owner so too late now.

The GE MLS1 lowband works much better. I made an Excel spreadsheet to calculate hex values for it.

[KitN1MCC]

Just giving info.