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UM4

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ID = 675
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Eye, 2 ranges, 2 shadow angles   Indication 
Identical to UM4 = 10M2 = MUM4 = 13M4U
Similar Tubes
Normally replaceable-slightly different:
  UM35
Different connections:
  UM34
Multiple differences or of other kind:
  OM5_MagicEye ; PM5_MagicEye
First year 1940 Tube leaflet collection E.Erb Analysis by original leaflets (P41-1)
First Source (s)
Jan.1940 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Predecessor Tubes C/EM2  
Successor Tubes 1954   UM34   UM80   UM85  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=V)
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.1 Ampere / Indirect / Parallel / series AC/DC /
Dimensions (WHD)
incl. pins / tip
27 x 90 x mm / 1.06 x 3.54 x inch
Weight 25 g / 0.88 oz
Tube prices 10 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  um4.png
  UM4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
um4mullardillumineep2s.jpg
UM4
Patrice Zeissloff

 
oc27_g_2.gif
UM4: RTT Schwandt
Günther Stabe

 
um4_spec.png
UM4: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 5= 1940?? ; 10= 1940 ; 1= 1941? ; 17= 1941 ; 2= 1942?? ; 1= 1942? ; 28= 1942 ; 1= 1943?? ; 1= 1943? ; 8= 1943 ; 1= 1944? ; 5= 1944 ; 1= 1945?? ; 4= 1945? ; 1= 1945 ; 3= 1946?? ; 1= 1946? ; 7= 1946 ; 2= 1947?? ; 2= 1947? ; 12= 1947 ; 3= 1948?? ; 6= 1948? ; 56= 1948 ; 2= 1949?? ; 15= 1949? ; 86= 1949 ; 10= 1950?? ; 11= 1950? ; 86= 1950 ; 3= 1951?? ; 10= 1951? ; 78= 1951 ; 4= 1952?? ; 13= 1952? ; 51= 1952 ; 3= 1953?? ; 10= 1953? ; 21= 1953 ; 4= 1954? ; 25= 1954 ; 5= 1955?? ; 2= 1955? ; 8= 1955 ; 3= 1956?? ; 3= 1956? ; 3= 1956 ; 2= 1957?? ; 5= 1957? ; 6= 1957 ; 3= 1958?? ; 2= 1958? ; 1= 1958 ; 1= 1959?? ; 1= 1959 ; 5= 1960?? ; 2= 9999?? ; 4= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):666


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