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DM71

Information - Help 
ID = 1905
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Stripe, exclamation mark 
Identical to DM71 = 1N3 = Y25 = 1M1
Similar Tubes
Other base:
  1M3 ; DM70
First year Aug.1953 Tube leaflet collection E.Erb Analysis by original leaflets [T8, Kat441, FS5304]

Base Subminiatur-8, with space 1/8, B8D
Filament Vf 1.4 Volts / If 0.025 Ampere / Direct / Battery =
Description Neben Batterie- auch für Wechsel- und Allstrombetrieb geeignet. 
Tube prices 6 Tube prices (visible for members only)
Literature Röhren-Taschen-Tabelle, (Franzis RTT)   
  dm71.png
  DM71: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
dm71_1.jpg
DM71: D.C.
Daniel Consales

 
dm71_so.png
DM71: rtt
Michael Schlör

 
dm71_data1.png
DM71: Valvo 1955
Robert Schmalstieg


Usage in Models 1= 1952 ; 6= 1953? ; 19= 1953 ; 4= 1954?? ; 6= 1954? ; 39= 1954 ; 5= 1955?? ; 6= 1955? ; 34= 1955 ; 5= 1956?? ; 7= 1956? ; 31= 1956 ; 1= 1957?? ; 5= 1957? ; 35= 1957 ; 2= 1958?? ; 1= 1958? ; 24= 1958 ; 3= 1959?? ; 6= 1959? ; 14= 1959 ; 10= 1960?? ; 7= 1960? ; 7= 1960 ; 2= 1961?? ; 1= 1961? ; 13= 1961 ; 4= 1962? ; 5= 1962 ; 6= 1963? ; 10= 1963 ; 4= 1964? ; 3= 1964 ; 2= 1965?? ; 1= 1965? ; 1= 1966?? ; 1= 1968 ; 3= 1969 ; 1= 1970?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):336



Forum contributions about this tube
DM71
Threads: 1 | Posts: 2
Hits: 2347     Replies: 1
DM71 : Differences to Dm70
Michael Watterson
04.Dec.11
  1

It may be that DM70 and DM71 are indentical tubes with just the end wires all cut same length on DM71, but DM70 has all wires cut short except four left full size.

The data is identical.

So see DM70 operation. You can certainly cut DM70 wires to fit a DM71 socket or use a cut-up turned-pin IC socket to wire a DM71 into a DM70 location. The DM71 wires are really too short to safely solder directly.

 

 

 

Emilio Ciardiello
04.Dec.11
  2

Michael,

yes, according to Ravalico and to other manuals, DM70 and DM71 just differ for the length of pins. DM70 had flying wires, to be soldered directly in the circuit, while DM71 was intended for use with a subminiature socket. Data are the same.

Emilio

 
DM71
End of forum contributions about this tube

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