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56 Ultron UK used/good 1952 (4.5ma) Image 1
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56 Ultron UK used/good 1952 (4.5ma) Nav Image 1

56 Ultron UK used/good 1952 (4.5ma)

$7.99 $8.99


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1943 56 all black plate Sylvania triode


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Preamp tubes
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  • Description

56 Ultron UK used/good 1952

4.5ma

Gm=1300

 

 

Tested on Amplitrex:

Vplate=250V

Vgrid=-13.5V

Iplate good range = 4.5-5.5ma

Good used Gm=1200-1300

(Vfilament = 2.5 volts)

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