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37 GE ribbed plate NOS 1943 (8.0ma) Image 1
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37 GE ribbed plate NOS 1943 (8.0ma)

$14.00 $16.99


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37 all preamp tubes Raytheon triode


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Preamp tubes
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  • Description

37 GE ribbed plate NOS 1943

8.0ma

Gm=1100

 

Test parameters:

Vplate=250V

Vgrid=-18V

Iplate good range 6.5-8ma

Gm=1000-1100

(Filament=6.3V @ 300ma, many think the 37 sounds better than the 76)

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