I HAD A LOOK at the Microwave Legends article in your August issue (p. 51), and I thought you might be interested in another piece of information. My dad, Gene Guthrie, wrote a patent in 1968 on a "Compact Frequency Multiplier" #3381207 while working at Fairchild (sponsored by Gordon Moore and Bob Noyce). This multiplier was the first successful solidstate solution to replace TWTAs in the US and Canada for point-to-point radios. The Fairchild Microwave group was later sold to HP and my dad went to California Microwave. For its day, California Microwave and this multiplier were the only game in town for thin-route telecom.