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RCA 5691 - red base, matched pair

RCA 5691 - red base, matched pair
Price: $169.00
1 matched pair in stock
Item Number: 1124
Manufacturer: RCA
The 1961 military spec RCA 5691 tubes in this precisely matched pair are a premium 6SL7 tube type—and an audiophile favorite. They have short bottles, dual top getters, black plates, and distinctive red bases. Their triple micas and 11 support rods contribute to their long life and low noise. The orange print on the bases have the GE logo and matching date codes (61-35).

Both tubes test as new with precisely balanced sections and very low noise. 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 of the actual tubes. Singles, when available, are listed as Item 156.

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CA 5691 / 6SL7GT - red base
RCA 5691 / 6SL7GT - red base, Raytheon label
Price: $84.00
RCA 5691 / 6SL7GT - red base, Raytheon label
This 1950s RCA 5691 is a premium industrial 6SL7GT tube. It has a short bottle, black plates, and a triple mica. The red base has yellow print with the Raytheon logo. Tube tests as new with very low noise.
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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