Vintage royal electronics corp echo transistorized rc radio transmitter. Vintage classic rc hitec focus 4 4-channel console transmitter w original batt. Royal 2-channel american aircraft modeler 1968 balsa corporation of america 3-channel american aircraft modeler 1968 cirrus 3-, 4-, 6-channel american aircraft modeler 1975 ace rc adams baby actuator american aircraft modeler 1968 ace rc sim-plus galloping ghost transmitter kit american aircraft modeler 1968 min-x 2-channel american. these lockheed employes were active rc flyers and this tx deck was the second rf deck that royal used. The first transmitter that royal designed was the purple box tx with a single pcb for the encoder and 27 mhz transmitter. ok,, im hoping someone out there in vintage radio land may be able to help. Im restoring a 1981 multiplex royal fm7 transmitter, and in desperate need of a good useable functioning circuit board. Either the royal fm 7 or the profi fm 7 (multiplex design also) circuit board would be a godsend. As i understand this is a transmitter built from an article in rcm in 1968. Now i am trying to find some information as i plan to rebuild itfrom 27 khz to 2,4 mhz and use it in vintage flying. Expand your options of fun home activities with the largest online selection at ebay.