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56 RCA Balloon engraved base black plate tests like new 1930's (4.7ma) Image 1

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

Name: 56 RCA Balloon engraved base black plate tests like new 1930's (4.7ma)
Brand: tubeworldexpress.shop
SKU: 56-rca-balloon
Price: 42.00 USD
Availability: InStock
Rating: 5 (1968 reviews)

$42.00 $49.99

Tags:

1943 56 all Balloon black plate engraved base RCA Radiotron Sylvania triode

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Description

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

Description

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