Home » (!!!!) (microphonic single) 5687 Tungsol ribbed black plates "U" getter NOS 1952 (42/41.5ma) (1st series made)

(!!!!) (microphonic single) 5687 Tungsol ribbed black plates "U" getter NOS 1952 (42/41.5ma) (1st series made)

Name: (!!!!) (microphonic single) 5687 Tungsol ribbed black plates "U" getter NOS 1952 (42/41.5ma) (1st series made)
Brand: Tube World
SKU: 5687ts
Price: 39.99 USD
Availability: InStock

$ 39.99

1 low noise microphonic single tube) 5687 Tungsol ribbed black plates "U" getter like new 1952 in white box

1 section) 37.5ma Gm=11,000

1 section) 40.0ma Gm=12,400

1ST SERIES MADE BY TUNGSOL (1949-1953 era)

BLACK RIBBED PLATES

322 = Tungsol factory code

224= date code 1952, 24th week

Tested on Amplitrex

Vplate=120V

Vgrid=-2V

Good Ma range 30-35ma

Good Gm range = 10K-12K

Recommended for

Manley

Modwright

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Ray Samuels

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Kondo

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Loth

See more: vacuum tube

Tags: 1952, 1954, 5687, 5687WA, black plates, ribbed plates, Tungsol, U getter

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