Alright. I replaced a broken tone pot that I had on my Heartfield Prophecy II. I realized that the extra pin on the existing pot was just ground. Anyways, after I changed the pot (which is a 250k), I noticed that I get a crazy hum when I set the controls a certain way. Just FYI, here are the controls I have: Master Volume Blend (Precision to Jazz) A Bass cutoff (just leaves mids and highs) Tone I get the hum like crazy when I switch all the way to the Jazz setting. It was driving me nuts, so I decided to look at the whole circuitry. I noticed that all the original pots were 20k. And that one tone pot I changed was 250k. Is it possible that the one pot I changed affected the whole circuitry? If so, should I change the other pots too? Phew. Sorry, this is a lot, but I would glady appreciate the help!