Quoted from WillThe power amp, the back part of the Spectra chassis CAN be moved up to cover 440 thru 480. The RF board is the same in all 4 UHF ranges, as is the command board. The MLM may be able to be range changed.
The hard part is the Receiver frontend board, so far no one has 'moved' them. The VCO may go up to 440-468 with some surgery.
I am willing to try this modification. I found this http://www.batlabs.com/specvco.html and I am fairly confident that I can modify the VCO to bring it up (just add another cut at the appropriate location right? make the strip shorter)
What do I need to do to modify the PA to bring it up to 440?
As far as the receiver front end, does anyone know what the component level differences are between the 403-433 model and the Range 2 model? Can I not just swap out the components with different values, and then some retuning at the local Moto shop to fine tune it? I understand that no one has been successful on this step, and I may not be as well, but its worth a try eh?
Also, understand that I have absolutely no interest in having any coverage on anything other than 440mhz. If possible, I do have several business band repeaters that I have permission to use, and if they will work on them that would be great, but if not then 440mhz will make me happy.