2A3 Sylvania rebranded National Union black plates connected in middle like new 1940's - springs hold up filament wires (old verison)

SINGLE TUBE, NOT A PAIR

Test Data: Vplate=230V, Vgrid=-30V

Iplate=108ma Gm=7000

Good NOS range 80-120ma

Test Data: Vplate=250V, Vgrid=-45V

Iplate=39ma Gm=5200

Good NOS range 50-60ma

- Very balanced, with great upper midrange extension. Highs are sweet and mids are
musical

Recommended for

Tektron

Melody

Bottlehead Stereomour 2A3

Ming Da

Musical Paradise