56_RCA_Balloon_engraved_base_black_plate_tests_like_new_1930_s_4_7ma

56 RCA Balloon engraved base black plate tests like new 1930”s (4.7ma)

Category: SKU: TOY391133

$15.00 $49.99

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56 RCA Radiotron Balloon engraved base black plate tests like new 1930”s in white box

4.7ma

Gm=1500

(Vfilament = 2.5 volts)

Amplitrex Test:

Vplate=250V

Vgrid=-13.5V

NOS Ma range = 4.5-5.2ma

NOS Gm=1400

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