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ThermionicScott · July 22nd, 2011, 02:15 AM

I dunno how helpful this is, but 7027's were listed in the RCA books as early as 1959, so it's certainly possible for them to have made it into some Valco/Supro designs.

July 22nd, 2011, 02:15 AM	#32 (permalink)
ThermionicScott Poster Extraordinaire Join Date: Dec 2005 Location: SW CR IA US NA PE Age: 32 Posts: 5,156	I dunno how helpful this is, but 7027's were listed in the RCA books as early as 1959, so it's certainly possible for them to have made it into some Valco/Supro designs. __________________ Wound thirds are my anti-wank.