Antique radios, Old Time Radios
D88526
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Country:
United States of America (USA)
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| Identical to |
D88526
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| Similar
Tubes |
Other class quality (otherwise equal):
D88057
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| Base |
Large 4 pin Bayonet
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| Was used by |
Telephony |
| Filament |
Vf 12.5 Volts / If 6.25 Ampere / Direct / Specified voltage AC/DC |
| Description |
This tube is similar to a 212D but has 23 grid turns (normal 212D = 39 grid turns). This was for lower mu and plate impedance. It was designed for high gain/high power carrier telephone repeaters but was also used "in experimental television apparatus to operste (the) neon tube".
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Dimensions (WHD)
incl. pins / tip |
x 345 x 92 mm / x 13.58 x 3.62 inch |
| Weight |
464 g / 16.37 oz |
| Information source |
Tube Lore (II) Page 249
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