Hello Jerry, You can buy several parts from RF Concepts now. Tubes - http://www.rfconcepts.com/Transmitting-Tubes Others for 78 - http://www.rfconcepts.com/Alpha-70-Parts_2 78 is the most favorite one for me still now, but I cannot understand why it doesn't have an aftercooling circuit. -- 73, Sugi JI3KDH