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ECH4

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ID = 279
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode-Heptode   Frequency converter   Controlling (mu) 
Identical to ECH4
Similar Tubes
Other shape (e.g. bulb type):
  ECH4N
Heater different:
  ACH1n
Other base:
  ECH21 ; ECH34 ; ECH4A ; ECH4G
Multiple differences or of other kind:
  E1R ; ECH2_Tungsram
First year Jan.1940 Tube leaflet collection E.Erb Philips-Archive
First Source (s)
Jan.1940 : -- Original-techn. papers.
Predecessor Tubes ECH3   ECH2  
Successor Tubes 1941   ECH21   ECH41  
Base Europe side contact P8A (Au P, 8SC) (Codex=Sak)
Filament Vf 6.3 Volts / If 0.35 Ampere / Indirect / Specified voltage AC/DC
Tube prices 15 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
ech4_1.png
ECH4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
au46.png ECH4: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad 		daten_ech4.png
ECH4: g.h.
Gerhard Heigl
More ...
Usage in Models 1= 1938? ; 2= 1939?? ; 2= 1939 ; 26= 1940?? ; 17= 1940? ; 47= 1940 ; 3= 1941?? ; 15= 1941? ; 141= 1941 ; 9= 1942?? ; 4= 1942? ; 74= 1942 ; 10= 1943?? ; 3= 1943? ; 58= 1943 ; 4= 1944?? ; 3= 1944? ; 32= 1944 ; 18= 1945?? ; 9= 1945? ; 40= 1945 ; 32= 1946?? ; 12= 1946? ; 64= 1946 ; 30= 1947?? ; 18= 1947? ; 112= 1947 ; 76= 1948?? ; 41= 1948? ; 132= 1948 ; 29= 1949?? ; 18= 1949? ; 146= 1949 ; 38= 1950?? ; 18= 1950? ; 76= 1950 ; 10= 1951?? ; 4= 1951? ; 19= 1951 ; 9= 1952?? ; 3= 1952? ; 6= 1952 ; 6= 1953?? ; 3= 1953 ; 1= 1954?? ; 2= 1954 ; 8= 1955?? ; 4= 1955 ; 1= 1957? ; 1= 1958?? ; 1= 1958? ; 1= 9999?? ; 6= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1445
Museum "Philips Historische Producten"

Collection of

Museum Roggenhofer (A)
Wolfgang Bauer (A)
Aldo Patriarca (CH)
Bruno Candreia (CH)
Christian Schaufelberger (CH)
Peter Steffen (CH)
Marco Lagendijk (NL)
Bekir Yurdakul (F)
Jose Luis Villabona Horreo (E)
Jose Antonio Gonzalez-Ruiz (E)
Carlo La Perna (I)
Emilio Ciardiello (I)
Alberto Ammendola (I)
Antonio Bordini (I)
Marcello Astolfi (I)
Massimo Pedrina (I)
Emilio Focosi (I)
Benedetto Pirani (I)
Mauro Minghetti (I)
Antonio Varrica (I)
Franco Antolini (I)
Wouter Brughmans (B)
Georges Werts (B)
Etienne Flemal (B)
Collection of a member from FIN
Sándor Selyem-Tóth (H)
Danko Tkalec (HR)
Tor Steinnes (N)
João-Afonso Santos (P)
Aires Gomes (P)
Tomasz Szczesniak (PL)
Valery Gromov (RUS)
Collection of a member from SK
Heinz Schmidt (D)
Otto Frosinn (D)
Jochen Amend (D)
Oskar Elm (D)
Werner Wussow (D)
Ulrich Fieseler (D)
Hans Pierrel (D)
Uwe Rössler (D)
Jürgen Küting (D)
Collection of a member from D
Jürgen Tiedmann (D)
Peter Pfeiffer (D)
Daniel Consales (D)
Peter Böhm (D)
Hartmut Völler (D)
René Goebel † 21.12.23 (D)
Klaus Neumann (D)
Collection of a member from D
Jacob Roschy (D)
Ottmar Rollmann (D)
Karl - Heinz Bossan (D)
Klemens Rhode (D)
 
ech4_666.jpg

ECH4
 

Variants

ECH4 with gold-colored bulb, although the ECH4 belongs to the red series.
Tungsram always was imaginative to simplify their production process. Since the ECH4 and the ECH21 have equal characteristics, the simply put the ECH21 structure into the old-style side-contact bulb to make a modernized ECH4. As the ECH21 structure already has a metal shield around, no metallized coating at the glass bulb was required any more. Jacob Roschy
ECH4 with tubular (straight) bulb
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