Quote:
Originally Posted by old_coot88
'Member that the 5Y3 has a 2A filament and the 5U4 is 3A.
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Yep , if you use a 5Y3 where a 5U4 is called for , you end up with a very HOT (overloaded) 5Y3
If you use a 5U4 where a 5Y3 is called for , you end up with a hot power transformer .....