Antique radios, Old Time Radios
DL21
Country:
Netherlands
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Identical to |
DL21
= MDL21
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Similar
Tubes |
Other base:
DL21_9pin
Other base and data slightly different:
DL11
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First year |
1940
Tube leaflet collection E.Erb P=41-1
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First Source
(s) |
Feb.1940 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Mar.1940 : Philips Bulletin # D 78
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Predecessor Tubes |
KL4
DL21_9pin
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Successor Tubes
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1948
DL41
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Base |
Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Voo)
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Filament |
Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery = |
Description |
The Philips 21- "Key Base" tubes were initially designed in 1940 with the 9-pin base B9G like the EF50. The later series production from 1942 on however was changed to the 8-pin Locktal-base B8G designed by Sylvania. There are also DL21's with international octal bases.
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Tube prices |
5 Tube prices (visible for members
only)
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Information source |
Taschenbuch zum Röhren-Codex 1948/49
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DL21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
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DL21: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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DL21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):139
Collection of
Collection of a member from FIN
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