http://www.w3eee.com/CodarAT5.htmlHere's one I never heard of. The Codar AT5 was a 160 and 80M AM-only xmtr. marketed in the UK during the 1960s. It has some interesting quirks; modified Heising modulation using a 6BW6 (beefed up 6V6) in the final, and a Vackar-type VFO.