I was looking for a IC-R100 for many years. I was lucky enough to find one earlier this month on a local ad. It wasn’t cheap but I know they are getting harder to find as time goes by. It came with no accessories but the seller advertised it as ”working perfectly fine”. After getting a 12V adapter I fired it up - the display looks great and audio is fine. AM for airband and WFM are working as expected but narrow FM doesn’t show any sign of a signal on any frequency. Also the squelch only functions when the radio is first turned on. As soon as it’s done receiving a signal it breaks the squelch and the control knob seems to have no effect. I also wanted to use the R100 for shortwave but in my first couple of experiments I picked up only 2 stations around 5900 kHz and they were very weak and had a lot of background noise. I found an owners manual, it really doesn’t provide anything that was helpful in resolving this radio’s shortcoming. So to begin with does anyone know why narrow FM mode will not engage? I can listen to VHF/UHF stations with WFM but they don’t sound right and the lack of squelch is downright annoying.