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(!!!!!) (Best Overall Pair) 6550 Tungsol branded Raytheon smooth gray plates NOS 1960-1963 era (136ma and 137ma)

(!!!!!) (Best Overall Pair) 6550 Tungsol branded Raytheon smooth gray plates NOS 1960-1963 era (136ma and 137ma)

$ 499.99

1 pair) 6550 Tungsol branded Raytheon smooth gray plates NOS 1960-1963 era in Raytheon boxes

1 tube) 136ma Gm=11,000 

1 tube) 137ma Gm=11,200  

 

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

 

See more: vacuum tube
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