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CL4 (CL4)

Jacob Roschy Martin Renz Ernst Erb Bernhard Nagel Eilert Menke 
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Forum » Valves / tubes - Semiconductors » VALVES/TUBES / SEMICONDUCTORS in RADIOMUSEUM » CL4 (CL4)
Jan Terranea
Jan Terranea
NL  Articles: 62
Schem.: 71
Pict.: 112
09.Oct.10 18:13

Count of Thanks: 12
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Looking at the data on this tube I read a filament voltage of 26 volts, while the Muiderkring schematic indicates 33 volts. I checked  Brands radio-tubes vademecum, that also indicates 33 volts filament. So I suggest a correction.

Best regards.  Jan Terranea.

Jacob Roschy
Jacob Roschy
D  Articles: 1668
Schem.: 17
Pict.: 68
09.Oct.10 18:53

Count of Thanks: 5
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 Hello Jan,

the heater voltage of older CL4 version is 33 volts, which was later reduced to 26 volts.
See also in «
Endpentode CL4» at “Bild 300” right top and right down.

Best Regards, Jacob