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RCA 5963 / 12AU7 - black plates, matched pair

RCA 5963 / 12AU7 - black plates, matched pair
Price: $49.00
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Item Number: 412BP
Manufacturer: RCA
The 1957 RCA 5963 tubes in this precisely matched pair are industrial 12AU7 type tubes. They have long black plates and foil D getters. The white print on the glass has the RCA logo.
 
Both tubes test as new with balanced sections. They are matched for both current draw (mA) and transconductance (Gm). Tubes ship in new white boxes with test results for each triode section.
 
These tubes are sold as a matched pair. Photo is a sample from the lot.

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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.

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