(!!!!) (Best Overall Pair) 6550 Tungsol gray plates NOS 1975 (139ma and 140.5ma)
$ 699.99
1 matched pair) JAN-6550 Tungsol gray plates NOS (7517=1975) same date codes - 3 large getters
1 tube) 139.0ma Gm=11,450
1 tube) 140.5ma Gm=11,400
Matched on Amplitrex
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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 (Best Overall Pair) 6550 Tungsol gray plates NOS 1975 (139ma and 140.5ma) "Pin It")