Rotator Controller Application Notes
RT-21r Relay Control Contact Closure
When configured as described, the RT-21 (or the ‘r’ version) can operate systems where only a set of contact closures are required. One for CCW and one for CW.
Prosistel 3 turn pot
Replacing the internal pot in a Prosistel rotator with a 500 ohm 3 turn unit will improve reliability, performance and reduce the affects of drifting and inaccuracies due to water or other cable contamination. This note describes the setup and calibration changes in your RT-21 to accomodate this modification to the standard PST rotator. NOTE: this does NOT apply to the PST controller, only an RT-21.
The application note describes the modification required and setup configuration for the RT-21 in order to operate an AR-40 rotator.