RE: Orbit Radio
My first radio was a Heathkit Blue Box. Wonderful radio never had a bit of trouble with it. Started with KPS-9 servos and they took a big plane to fit, since they were the same dimension 3 side by side and lenghtwise. Later added the KPS-12 servos, something like 15 transistors on one little circuit board. Didn't worry about servo reversing, just take the back of the transmitter off and switch the leads on the stick pot. When I built it, I wired the switch wrong and failed the smoke test. Sent it to Heath and they said it had a bad circuit board and sent me a factory assembled one for free. Oh and had 4 wire servos but the offered a conversion later to 3 wire.