Orion small encoders - replacement sources and installation tips

The six small encoders used in the Orion and Orion II are no longer available and the replacement encoders offered by Ten-Tec service are expensive. There are no exact replacements available on the market with a 25mm shaft length and 6mm diameter round shaft. The Bourns PEC11L-4125F-S0020 encoder is offered by Mouser and, although not an exact replacement, should work well (perhaps better than the original) and I will report back after installing them.

Consult front panel disassembly instructions and RIT encoder changing instructions given by K4ZNO.