There aren’t many other possibilities any longer. If you have access to a shop with modern electronic instrumentation and a copy of the manual, at least you would stand a chance of improving the receiver. It might have been an electrolytic capacitor (and there are many!) whose dielectric needed to be re-formed. After that point the problem disappeared and it has not recurred. A friend and I tore into the receiver, but the ultimate “fix” in my case was to leave the receiver powered up continuously for almost a week. The manual is large and it is expensive, but it also is complete. Ultimately I bought the service manual for the receiver, the only item which Icom would sell. I don't know whether he has changed his mind about it. ![]() Tim said that he would not touch the receiver either (at that time) since he also could not get parts for it from Icom. I then called Tim Moes at his shop and asked him for help. ![]() ![]() Curiously they were still servicing the earlier R9000s! Icom simply would do nothing to support the 8500. ![]() I first called Icom America and learned that they had just discontinued all parts and service *totally* for the R8500. Several years ago my R8500 developed an electrical breakdown somewhere in the RF chain, leading to unstable howling oscillations and no reception.
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