Camp, really any of the domestically manufactured --brand name-- tubes made   
   into the early 1980s should be OK.   
      
   There were JAN (Mil spec) tubes made by several co's that are mechanically   
   more rugged, but for juke use I didn't find any other advantage.   
      
   When I used these tubes commercially, I saw around 3-5 months of reliable   
   stepper operation and perhaps 2 years in trip. In the LPC series machines   
   where the trip tube only operates on readout and powers an 1100 ohm relay (as   
   opposed to 250 direct trip    
   coil on earlier models) the trip tube would last a lot longer.   
      
   Most important to tube life is being sure that the tube does not conduct until   
   it has warmed up.   
      
   Rob/NYC   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)