Antique radios, Old Time Radios
RTP4
|
Country:
Italy
|
|
| Identical to |
RTP4
= E443H
= L496D
= PP4101
= RES964
= DW9
|
| Similar
Tubes |
Normally replaceable-slightly different:
PM24M
Other base:
AL1
|
| First Source
(s) |
Apr.1933 : Philips Bulletin
|
|
Successor Tubes
|
1935
AL1
|
| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1.1 Ampere / Direct / Specified voltage AC/DC |
| Description |
By model of the very similar USA-types PZ or 47 from 1931, with the E443H Philips now introduced output pentodes in Europe with equally 250 Volts screen and plate voltage, it also brought the 7k-ohms load-standard to Europe which remained until the end of the tube era. The former E443N required 400 Vp, but extra 200 Vg2 [J.R. 2003-01-19]
Text in other
languages (may
differ)
|
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
|
|
RTP4: Telefunken Werkstattbuch
Wolfgang Bauer
|
Just Qvigstad
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Collection of
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