More Valve Data for Portable Radios
DM70 Valve
This is a wire ended valve used as a tuning indicator in valve portables from the 1950's.
Wireout is:1 Grid. 4 Filament. 5 Filament. 8 Anode.
Filament Voltage = 1.4v. Filament Current = 25ma
Anode Voltage = 60 to 90v
The grid is connected to the detector circuit of the Radio
Equivalent Types. 1M3
EZ41 Valve
A rectifier valve which was quite common in the early 50's in portables (Vidor,Bush etc) used in an internal power supply as an alternative to batteries.
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Pin Connections: 1 Heater, 2 Anode, 6 Anode, 7 Cathode, 8 Heater. Pins 3,4 and 5 not used. |
| B8A Holder |
Heaters 6.3v. Heater Current 0.4A. Max Volts Anode 250v. Max Anode Current 60ma. |
Mullard DF33
| Valve |
Equivalents |
Fil V |
Fil A |
Anode V |
Anode A |
As Listed |
As Listed |
Base |
Description |
| DF33 |
1A7GT |
1.4v |
50ma |
90v |
1.2ma |
0v Vg1 |
90v Vg2 |
Octal |
HF Pentode. Variable-mu |
| DAC32 |
1H7GT |
1.4v |
50ma |
90v |
0.15 |
0 |
0.055ma |
Octal |
Single Diode Triode |
| DK32 |
1A7GT |
1.4v |
50ma |
90v |
0.6ma |
45v vg3+vg5 |
90v vg2. 0v vg4 |
Octal |
Heptode. Variable mu |
| DL35 |
1Q5GT |
1.4v |
0.1 |
90v |
7.4ma |
90v vg2 |
-7.0 vg1 |
Octal |
Output Pentode |
Last updated 3.7.2004
2003 © Maurice Woodhead
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