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World's Best NOS 5691/6SL7 RCA Red Base Dual Triode Perfect Matched Pair
World's Best NOS 5691/6SL7 RCA Red Base Dual Triode Perfect Matched Pair
 
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Product Code: 5691-RCA-RED-BASE-PAIR
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World's Best 5691/6SL7 NOS RCA Red Base Dual Triode Perfect Matched Pair

1956 D-getters Black-Plates with reinforcement bars and Beautifully "red marbleized" bases


10,000 hour low noise substitute for a 6SL7GT

5691 RCA "HOLY-GRAIL" RED BASE "BLACK PLATES

- 2A3 amps
- Jule Amps Brenda K. Head 23W Guitar Amplifier
- Brenda K. is a dual rectifier, dual 6V6 ouptut amplifier
- Midnight Special 112 Combo
- Ampeg Heritage B-15
- Alessandro Itallian Greyhound jazz amp
- Alessandro Black and Tan 2005
- Almarro A318B
- Eddie Current

Rarely do you see such a fine NOS tube pair with Perfect Specifications:

Pair # 1:  ( see actual Amplitrex digital test results)

2.2mA/2.2mA and 2.1mA/2.1mA

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