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(!!!!!) (BEST SYLVANIA PAIR) 6550 Sylvania welded plates NOS same date codes 1970's (140ma and 142ma) (BEST PAIR)

$ 329.99

1 matched pair) 6550 Sylvania welded plates NOS original boxes 1970's - same date codes - excellent pair - you can't buy a better pair

1 tube) 140ma Gm=11,300

1 tube) 142ma Gm=11,350

 

Good NOS Ma range 125-140ma

Good Gm range 10,000 - 11,000

 

 

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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