I've been using a green bullet and Crate Vintage Club 30 watt tube amp. The problem I am having is feedback when I jam. Any suggestions: new mic - Astatic JT 30 - Blues Blaster - Shaker (not amp...$$$)(I don't want to go right through the P.A., I want to use the amp for tone and as a moniter on stage). Any help would be very much appreciated. P.A.D.