Antique radios, Old Time Radios
DM21
 |
| Identical to |
DM21 = MDM21
|
| Similar
Tubes |
Other base:
DM21_9pin
|
| First year |
Apr.1940 Tube leaflet collection E.Erb Philips-Archive, Book 3 = April |
| First Source
(s) |
Apr.1940 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Mar.1940 : Philips Bulletin # D78
|
|
| Base |
Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vo)
|
| Filament |
Vf 1.4 Volts / If: 0.025 Ampere / -: Direct / -: Battery = / |
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
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DM21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
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DM21: collection JR
Jacob Roschy
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DM21: Telefunken Werkstattbuch
Wolfgang Bauer
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DM21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
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| Usage in Models |
1= 1949 |
| Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 1 |
|
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