Hello. Am not sure what model Icom radios. Back in the 80’s, Icom loaded the radios firmware into ram, backed up by the lithium disc battery. When the battery died, the firmware was lost, thus, a trip to the service was needed. This was before nvram was the thing I guess. Have you ever encountered that issue with any older Icom? Btw, was wondering if you got rid of your 8600?
