So far I have a CAA National NC 100F receiver, A CAA RV-2 vhf receiver 50 - 200 mhz am/cw/fm and an FAA vhf transceiver (like a jazzed up Gooney box) But I can't find references and two of the manufacturers I have never heard of before. Where can I do some research on the web? Tnx Greg WA7LYO in sunny Feenix