Antique radios, Old Time Radios
PEN4VB
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Country:
Great Britain (UK)
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| Identical to |
PEN4VB
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| Base |
Europe 7-Pin C7A (Hx C, C7, C) 1933
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| Description |
Unusully high slope (10mA/V) for the time - before 1935. Vg = -5.8V, from an Rk of 145 ohms with a Va of 250V.
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Just Qvigstad
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