It's this last filter that is switched between narrow and wide in the VHF/UHF radios. Transmit will support wide band (and must be aligned for wide band first!) The IF filters simply need to be swapped with their wide band parts and wide band receive alignment performed.Hardware ModTheir are 3 filters in the radio, 1 at 44.85 MHz 1st IF and 2 at 455khz, 2nd IF.In a VHF/UHF Waris there is a 15KHz filter at the 1st IF followed by a 15KHz filter at the second IF and then followed by another filter. The issue is these radios are narrow band only on the receive path, as the 200 MHz band was never used for 25 KHz channels. Flash adapter for CDM1250 radio 220 HT1250ls and CDM 1550lsThis is the same as any other to modify to the amateur service from a software perspective. The majority of modification of these radios to amateur service is done with modifications to the codeplug. This is the same area the programing data from CPS is written in, but CPS is unable to change it.
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May 2023
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