(!!!) (Best Pair #1) 56 Sylvania black plate NOS 1940”s branded Western Electronics 1940”s slightly tilted glass (6.1ma and 6.1ma) 1-2% matched

1 pair) 56 Sylvania black plate NOS 1940”s branded Western Electronics 1940”s original boxes, 4 metal prongs on top mica, same internals – slightly tilted glass

1 tube) 6.1ma Gm=1500

1 tube) 6.1ma Gm=1500

Amplitrex Test:

Vplate=250V

Vgrid=-13.5V

Iplate good range = 4.5-5.5ma

Gm=1400

– Inspire LP-27A