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(!!!!) (BEST SINGLE) 201-A Silvertone Balloon NOS 1930 era (3.8ma and Gm=750) Image 1

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(!!!!) (BEST SINGLE) 201-A Silvertone Balloon NOS 1930 era (3.8ma and Gm=750)

Name: (!!!!) (BEST SINGLE) 201-A Silvertone Balloon NOS 1930 era (3.8ma and Gm=750)
Brand: tubeworldexpress.shop
SKU: best-single-201-a-silvertone-balloon-nos-1930-era-3-8ma
Price: 49.00 USD
Availability: InStock
Rating: 5 (1792 reviews)

$49.00 $57.99

Tags:

01A 1930 1930's Crosley Cunningman National Union preamp tubes RCA

Categories:

Preamp tubes

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Description

201-A Silvertone Balloon NOS 1930 era original box with data sheet

3.8ma

Gm=750

NOS Ma = 2.5-3ma+

NOS Gm = 800-900

(Filament=5V @ 250ma, Vplate max=135V)

- Crosley C5 1926

Class A Amplifier:
-----------------
Plate Voltage = 90
VGrid No. 1 Voltage -4.5V
Amplification Factor (mu) = 8
Plate Resistance (approx) 11Kohms
Transconductance = 725mhos
Plate Current = 2.5 mA