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Not much to go on

But the top mica spacers, large g1 radiator "flags" and no metal base make it look like a late version of the RCA 7027(A). 7027 is a significantly uprated 6L6GC but is not a plug-n-play sub because g1 and g2 are brought out to two base pins each instead of the usual one pin each for most 6L6 types. IOW, using a 7027 in a 6L6 app might require a socket rewire. Some Mac 6L6 amps (MC240, MC40) come prewired for either a 6L6 or 7027 as silkscreened on the chassis.


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Follow Ups Full Thread
Follow Ups
  • Not much to go on - Steve O 17:33:21 11/25/23 (0)

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