Jack Worstell Posted April 18, 2018 Share Posted April 18, 2018 Are all 2530 bulbs "pre-focused" ? Jack Worsell Link to comment Share on other sites More sharing options...
ply33 Posted April 18, 2018 Share Posted April 18, 2018 Yep. 2530 is the designation for a pre-focused, double contact lamp with a RP-11 glass bulb shape with a 50/32 cp rating for a 6v electrical system. There are apparently a couple of different pre-focused bases. For the 2530 my old 1970s GE lamp guide notes the base is "D.C. Pf. (A)". There are some others with the base specified as "D.C. Pf. (S)" I don't see an explanation of the difference between a "(A)" and a "(S)" base. Link to comment Share on other sites More sharing options...
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