Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Robynsaddiction-at-aol-dot-com> Some doorknobs are OK for TC use. Just make sure that they are not Z rated ceramic. Be sure to use ones that have low inductance, and ones that have a dielectric that is suitable for high current RF. If you can find some TDK capacitors they work great.