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RE: Jan vs JG and 5 star in ge 5670's

JG is nothing more than the code the Mil used for GE. JAN is Joint Army Navy designation, which included all the manus who bid on and ultimately produced a batch of tubes under military contract.
5-Star were GE's equiv of RCA's Command Series....many used in commercial radio stations. Low noise, very close operating parameters between triodes (in dual-triodes, etc.
Hope this helps a bit.

jstrm


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