You might also want to download MIL-HNDBK419 REV A, VOL 1 & 2 and the Motorola manual R-56. Both available on the web. --- Ciao baby, catch you on the flip side 73 de W3AB/GEO WA2LSI, KE6RJW, W7B, AAR9AG http://www.w3ab.org You can say "over", you can say "out", you just can't say "over and out".