Hi Roger, > H-Mode mixers were made with J310's before people started > using the Fairchild devices, I think. Given the IP3's of > 40-45 dB quoted, to you think that it would be worth trying > this at 144 MHz? Yes, absolutely. For the HF bands you can use H mode mixers to convert from ham bands to 2.5 MHz:) 73 LeifLINRADDARNIL