Antique radios, Old Time Radios
328A
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Country:
United States of America (USA)
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| Identical to |
328A
= 4328A
= 5A/136A
= S328A
= CV2619
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| Similar
Tubes |
Normally replaceable-slightly different:
JP728
Heater different:
S310A
Other base:
4328D
; 5A/136D
; CV245
Other base and other heater:
310A
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| First year |
1937
- - Manufacturers Literature Western Electric Company Inc.: Voltage-amplifier
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| Base |
6-Pin-Base U6A, old, USA (Codex=Kf)
Top contact with a cap.
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| Was used by |
Telephony |
| Filament |
Vf 7.5 Volts / If 0.425 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Similar to 310A with different heater. Silvered pins, gold-plated grid.
WE writes in 1937: "The electrical characteristics of the 328A tube are identical to those of the 310A tube except for the heater voltage and current."
"This tube is intended primarily for use in audio, carrier and radio-frequency voltage amplifiers, oacillators or modulators. The connection for the suppressor grid has been brought out to an external terminal, thus making the tube more flexible in its applications." ... "A small, metal cap control-grid terminal is located at the top of the bulb."
The tube was widerly used for telephone repeaters and was also made by Valvo in Germany - and used for military purposes.
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Dimensions (WHD)
incl. pins / tip |
x 124 x 40 mm / x 4.88 x 1.57 inch |
| Tube prices |
3 Tube prices (visible for members
only)
|
| Information source |
Tube Lore (I)
Babani, International Radio Tube Encyclopaedia p. 32 & 33
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49
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328A: rtt
Anonymous 10 Collector
More ...
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Just Qvigstad
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328A: own collection
Peter den Boer
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
Collection of
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