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(!!!!!) (Best Overall Pair) 6550 Tungsol branded Sylvania smooth gray plates NOS same date codes 1963 era (141ma and 143ma)

(!!!!!) (Best Overall Pair) 6550 Tungsol branded Sylvania smooth gray plates NOS same date codes 1963 era (141ma and 143ma)

$ 499.99

1 pair)6550 Tungsol branded Sylvania smooth gray plates NOS same date codes (YBF) 1963 era in Sylvania boxes

1 tube) 141ma Gm=11,300 

1 tube) 143ma Gm=11,700  

 

Good NOS Ma range 120-140ma

Good NOS Gm range 10,000 - 12,000

 

Recommended for

- ARC VS 110 and other ARC amps
- Audio Research Reference 3 line-stage power supply 
- Rogue 90
- VTL amps; MB300, 450, many others
- Gibson guitar amp
- McIntosh 275
- Beard P100 MKII 1984
- Cayin A-88T

 

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