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RE: RCA 6SN7 identity

I think you meant WGTAs, although they are more frequently seen in Sylvania tubes If you meant GTAs no W, that could easily be RCA Yours with opaque grey glass are most likely RCAs as you point out. I am a little confused. I will look through my Sylvanias for grey glass , not the shaded "graphite" type -correct?


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  • RE: RCA 6SN7 identity - Mechans 17:20:41 10/14/15 (1)

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