Radio Antica e Radio d'epoca
328A
|
Stato:
USA (Stati Uniti d'America)
|
|
| Identico a |
328A
= 4328A
= 5A/136A
= S328A
= CV2619
|
| Valvole
simili |
Sostituita normalmente - piccola diff.:
JP728
Heater different:
S310A
Altra base:
4328D
; 5A/136D
; CV245
Other base and other heater:
310A
|
| Prime serie |
1937
- - Manufacturers Literature Western Electric Company Inc.: Voltage-amplifier
|
| Zoccolo |
6-Pin-Base U6A, old, USA (Codex=Kf)
Top contact with a cap.
|
| Utilizzata per |
Telephony |
| Filamento |
Vf 7.5 Volt / If 0.425 Ampere / Indirect / Specified voltage AC/DC |
| Descrizione |
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.
|
Dimensioni
(LxAxP)
incl.pins/tip |
x 124 x 40 mm / x 4.88 x 1.57 inch |
| Quotazioni |
3 Quotazioni (visibili solo per gli
associati)
|
| Bibliografia |
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
Anonimo 10 Collezionista
Segue ...
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Just Qvigstad
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328A: own collection
Peter den Boer
Segue ...
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Numero
totale di modelli di Radiomuseum.org che
utilizzano questa valvola:1
Collezione di
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