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(!!!!!) (BEST SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (57/40 and 58/40)

$ 16.99

1 tube) 6X4 SER = LM Ericsson Sweden NOS "D" getter 1950's in original box

Aktiebolaget Svenska Elektronror = Limited Company Swedish Electron Tubes

57/40

58/40 

 

40=65%

50+=100% 

 

Recommended for

Audio Note DAC 1.2
LAMM LP2 phono

KONDO KSL M7 preamp
Kondo M77 preamp
Eastern Electric Minimax Phono

Pultec EQ

Wright WPP200C
Audio Note M7

 

 

 

 

 

 

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