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(!!!!!) (Best Pair #1) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.2/10ma and 11.2/9ma) (best sound)

(!!!!!) (Best Pair #1) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.2/10ma and 11.2/9ma) (best sound)

$ 129.99

1 pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971  

1 tube) 11.2ma Gm=5000 and 9ma Gm=6500 (triode/pentode) 

1 tube) 11.2ma Gm=5100 and 10ma Gm=6600 (triode/pentode) 

 

Matched on Amplitrex

Good Triode Ma/Gm=11-14ma Gm=4500-5000

Good Pentode Ma/Gm=8-10ma Gm=5500-6000

 

 

Recommended for

- McIntosh MR67, MR71 FM Stereo tuner
- Telefunken radio
- Graaf GM 100 amplifier
- HH Scott 350 Tuner 1961-2

 

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