Antique radios, Old Time Radios

ECH4

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: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †
ECH4: RTT 1974 (Franzis) 13. Auflage Martin Renz	Just Qvigstad	ECH4: g.h. Gerhard Heigl More ...

Usage in Models

1= 1938? ; 2= 1939?? ; 1= 1939? ; 2= 1939 ; 27= 1940?? ; 16= 1940? ; 46= 1940 ; 3= 1941?? ; 14= 1941? ; 140= 1941 ; 7= 1942?? ; 4= 1942? ; 76= 1942 ; 10= 1943?? ; 2= 1943? ; 58= 1943 ; 4= 1944?? ; 3= 1944? ; 32= 1944 ; 19= 1945?? ; 8= 1945? ; 39= 1945 ; 29= 1946?? ; 12= 1946? ; 64= 1946 ; 27= 1947?? ; 18= 1947? ; 112= 1947 ; 72= 1948?? ; 39= 1948? ; 132= 1948 ; 28= 1949?? ; 16= 1949? ; 146= 1949 ; 36= 1950?? ; 17= 1950? ; 75= 1950 ; 8= 1951?? ; 4= 1951? ; 21= 1951 ; 9= 1952?? ; 3= 1952? ; 6= 1952 ; 5= 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):1421

Museum "Philips Historische Producten"

Collection of

Peter Roggenhofer † 25.4.18 (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)

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

Collection of a member from D

Collection of a member from D

Jacob Roschy (D)

Ottmar Rollmann (D)

Karl - Heinz Bossan (D)

Klemens Rhode (D)

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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