[AMPS] 3-500Z tubes

[Rich Measures]

>I picked up a set of tubes made by NATIONAL in france. Are these the
>same As amperex? 

Amperex uses bubble-glass in the base.  Do the 'NATIONAL' tubes have 
bubble-glass?
cheers
Rich...

R. L. Measures, 805-386-3734, AG6K   


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