: Draft high frequency generator (1-4-4 + 1-4-5S)
As there is high voltage (5000V) and high frequency (19.2MHz) present, a measurement would
be very difficult and, above all, very dangerous. Before the generator cover plate is unscrewed,
the device should be turned off or, better, the power plug pulled out.
Mortal danger from electric shock
Exposed power contacts - High Voltage
Before touching any components or wiring, make sure the capacitors are discharged.
You should check the connections in the oscillator circuit to ensure all screws are turned tightly,
especially all the cap screws on the combustion coil.
The electrical connections and resistors should be checked with an ohmmeter. If the resistor
2.7K / 100W (3) is open circuit, then there is no oscillation, but also no power consumption.
The tube doesn't take any current at all. The parts e.g. tube and rectifier should be replaced one
by one.
6. The ground connection of the tube’s cathode is interrupted.
The cathode of the oscillator tube is connected to the ground. The cathode is connected with
one of the two leads of the filament inside the tube. So, one of the two filament plugs on the
socket is connected to the chassis having this way a ground connection
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