Dudley Chapman wrote: > My K2 #2522 seems to have no functional problems that I can see. > However, I have noticed a kind of "rasp" on the rx of cw signals. I > haven't had a chance to characterize if it is band specific or not, > however. The first thing to check is whether your K2 is close to your power supply, or anything else with big transformers in it. The K2 is susceptible to nearby magnetic fields.