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03/19/18 at 19:16:12 


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5R4 GYA (Read 1137 times)
Senior Member

Posts: 60
03/16/11 at 16:37:20
 Can this tube be substituted for 5U4 in the Torii III?  It looks to draw 3 vs 2 amps for the heater and the operating parameters seem more robust.  I have a pair of JAN GE that are new and unused.  I love the fact that the power transformers of the Torii do not run HOT and would like to keep it that way.
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