>>šeme<<          >>kolekcionari<<        >>povratak na izbornu stranicu<<

ECH 21   Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands    Developer:  Philips; - Eindhoven; Netherlands    Tube type:  Triode-Heptode   Frequency converter   Controlling (mu)  Identical to ECH21 = ECH71 = X143 Similar Tubes ECH4 (other base)   TH1_BBC (can normally be replaced - small diff'ce)   ECH4G (other base)   ECH34 (other base)   CV302 (Multiple differences or of other kind)   First Series   Feb.1941 Tube leaflet collection E.Erb Philips Book (P11-41) First Source (s) Jul.1941 : Radio-Mentor # 7 Feb.1941 : Daten und Schaltungen moderner ... Röhren; Philips # 3 Predecessor Tubes ECH4   ECH3   Successor Tubes ECH41   ECH42   Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wf) Was used by Radio/TV-reception etc. Filament -: Indirect / -: Parallel, (AC/DC) / If: 0.35 Ampere / Vf 6.3 Volts / Tube prices 1 Tube prices (visible for members only) Literature Taschenbuch zum Röhren-Codex 1948/49         Usage in Models   2= 1941?  48= 1941  2= 1942?  57= 1942  1= 1943?  53= 1943  1= 1944??  5= 1944?  67= 1944  2= 1945??  9= 1945?  25= 1945  5= 1946?  74= 1946  2= 1947??  1= 1947?  93= 1947  3= 1948??  8= 1948?  108= 1948  1= 1949??  8= 1949?  97= 1949  7= 1950??  8= 1950?  66= 1950  1= 1951??  6= 1951?  27= 1951  2= 1952?  16= 1952  2= 1953?  9= 1953  1= 1954??  1= 1954?  4= 1954  3= 1955??  1= 1955?  16= 1955  5= 1956?  7= 1956  10= 1957  1= 1958??  3= 1958  3= 1959  1= 1960??  1= 1960  4= 1961  1= 1962  1= 1964  Number of Models with this tube   879