Batboard

HI! I have a spectra VHF D43KXA7JA5BK and I need to operate on 173.7XX MhZ. But this radio have a bandsplit 136-162. In another radio same model the bandsplit is 146-174 and work fine. I forced the codeplug of the second radio in the radio with 136-162 bandsplit and the radio give the fail 001 (out lock). When I read the radio now the bandspli appear 146-174, with lower frequencies i.e. 163.800 MhZ work fine but on 173xxx MhZ fail 001 appear on display and the radio don't transmit . I have 9,36 Volts on the pin 3 of the VCO board...it's out range! Someone know if is possible to fix this problem?
I read on the forum similar problems, but all with UHF model to go on lower frequencies .....I need to go up!
Thanks in advance!.........sorry for my poor english!!!

Turi,

Many others have tried like you did, it does not work. It will go FAIL001 in different parts of the band.

Exchanging the radio for the correct range is best. Here in the US, some perfer the VHF range 1, 136 to 160, so they can do ham radio. At minium, the VCO, and RF receiver frontend/mixer, modules have to be changed out, the other boards are the same in renge 1 and 2 VHF.

I have moded the VCO and get them to work up there in the 17x range but the receiver starts to fall off at 165 badly. First you need to get the original 'code plug' back into the radio to match the VCO. There is some band range change commands that shift the VCO during normal operation, and they need to match correctly. Then trim a very little off of the tuning stub on the VCO substrate, and the VCO will lock further up in the 170's.