radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

DL21_9pin

Information - Help 
ID = 31608
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   Power/Output 
  Late but no serial production. For instance only development samples. *****
Identical to DL21_9pin
Similar Tubes
Other base:
  DL21
First Source (s)
Feb.1940 : Philips documents
Successor Tubes 1940   DL21  

Base Loctal-9-Pin (B9G)
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 base.

 
Information source - - Manufacturers Literature   1940-1941

dl21_9b_r.png DL21_9pin: original Philips documents
Jacob Roschy


Just Qvigstad
dl21_9pin_data.png
DL21_9pin: own collection
Peter den Boer

Collection of

 
dl21_9s_r.jpg

 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

Data Compliance More Information