I have a PCB with a loop trace (correct term?) antenna. That is, its a track that's right around 1/2 wavelength long. I want to put a variable cap on that and then be able to tune each pcb for optimum resonance at my radios freq. What equipment would I need for that? A signal injector? A network analyzer? The freq is 916Mhz fixed incase that helps. The output power of the radio is about between 3 and -3 db, very low power. If anyone can suggest equipment, including make and model it would give me a starting point to do some shopping. or if you can tell me some of the specs to look for that would be great. Any input is welcome and appreciated. Shawn -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist