I have a Hitec challenger 620 (or 720?) in the basement. I phoned Hitec and they denied ever selling these radios.
They wouldn't help me get connectors for the receiver and/or adapters (oddly found them scrounging the LHS). later I saw a 620 for sale, NIB at another LHS, odd to see equipment from the mid eighties in hobby shops.
Yes I have one or three Hitec 101 servos. Somewhere. Not in a plane.