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(!!) (BEST PAIR) EL153 Telefunken NOS 1960's (72ma and 74ma)

$ 198.88

1 matched pair) EL153 Telefunken NOS 1960's original boxes

1 tube) 72ma Gm=4500

1 tube) 74ma Gm=4400

 

 

Tested on Amplitrex

Vplate=500V

Vscreen=250V

Vgrid=-49V

Good Ma = 50ma

Good Gm = 4000 

 

 

notes:

10 pins

Power Tetrode

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