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(!!!!!) (Recommended Single) 6550 Tungsol black plate NOS 1960 (136ma) (Recommended for Audio Research and Tavish power supply)

(!!!!!) (Recommended Single) 6550 Tungsol black plate NOS 1960 (136ma) (Recommended for Audio Research and Tavish power supply)

$ 459.99

1 tube) 6550 Tungsol black plate top getter and 2 side getters 1960 (3226020-3)

136ma

Gm=10,900

- 2nd 6550 version made by Tungsol

 

Tested on Amplitrex:

Good NOS Ma range = 120-140ma

Good NOS Gm=10,000-12,000

 

(The original 6550 Tungsol are built the best, sound the best, and are the longest lasting 6550 ever made) (They have superb bass, lots of power and inner resolution) (The re-issued 6550 Tungsol made in Russia is sonically inferior to the original Tungsol made in the USA) 

recommended for

- ARC VS 110 and other ARC amps
- Audio Research Reference 3 line-stage power supply
- Audio Research Reference 6 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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