[TowerTalk] Ring Rotor ?

[Wayne Kline]

 Preparing for some tower maintenance... I have two Older style  aluminum black box RR motors..... 
 
OK  I need to replace a POT   My question is .....The original 1022 1032  were they the BLACK Pots and then Carl upgraded to the Blue " Bourns 3590S "
 
or is it the Black Pot  "Clarostat  73JA "    the better   WX resistant pot .  
 
Wayne W3EA             
 
PS wish I had  digital  I phones... to document  ....years ago ...