Well old car season is about to start here and I want to get my two pair = of G-66b/77 on the air in my 54 Plymouth and 50 Chrysler. Any thing I should look out for? How good are they on the 6VDC? I do = have a 6/12/120 pack for the g-66b's. Should I start they off on AC? = Does any one have a transistorized drawing for the Vibrator? Would I be = better off with bipolar transistors or FETS? Which FETS? Lynn AA1oh