I've had my IC-7k for several years now and seen very little transmit time. Mostly I use it to (try to) listen to the Shortwave Radiogram transmissions on the weekend. A few months ago I began noticing that right after I turn the radio on and when it's cold, the receiver would go deaf when I change frequencies with the dial. I'm not spinning the dial very fast and most of the time I'm in AM mode and anywhere from 5 MHz to 20 MHz. Basically the background noise is reduced in level. When this happens, I simply power cycle the radio and receive sensitivity comes back. I got around this problem by simply turning the radio on Friday evenings to let it warm up and be ready for the weekend activities. Lately it's gotten a LOT worse. Tonight I could barely go more than a few kHz before sensitivity would go away. I've also noticed that at times AM transmissions just don't sound "right". I would switch to either LSB or USB and could tell the radio was off frequency. Power cycling again and sideband reception sounds just like AM (well, as close as a dual sideband AM transmission could). There's a local AM transmitter a couple miles from my home and before I could tune to the station and listen without issue. It would be 60+ dB over but I could still receive it. Enabling the attenuator dropped the signal strength as expected. Tonight however, there was nothing I could do to bring that station in. As I tuned toward it, the signal level would rise quickly and then the radio would go deaf. If I enabled the attenuator, still deaf. If I power cycled with the attenuator enabled, I'd get a fraction of a second of audio before it would go deaf.
Any ideas what could be going on with this thing? This radio has had a pretty sheltered life and when it's been off, the antenna has been grounded, so I'd most likely discount any static hits.
Thanks in advance!