I recently purchased a 4 channel crystal controlled RCA Mark VII tube base station. It has a 4 channel crystal controlled transmitter. The receiver can be tuned by either a 23ch VFO or four receive crystals. The radio has been recapped, works and sounds great, but the 4 channel limitation of the transmitter poses a problem. Crystals are expensive, and I'd rather not have to switch crystals constantly in order to transmit on different channels. Would it be possible to modify the radio so that the receive VFO could be used to set the transmit frequency? any help would be greatly appreciated.
Schematic/Service manual is located here:
RCA MarkVII (CRM-P3A-5)
Schematic/Service manual is located here:
RCA MarkVII (CRM-P3A-5)