Detector bias reading is taken at the overload point of an incoming signal where it generally reaches a maximum of 5 volts. With zero volume control, the reading here is approximately 4 volts. This, of course, is not the true reading, because resistance of volt meter becomes a parallel circuit, cutting down the resistance, and of course, dropping the voltage. Reading taken in this case was with 10,000 ohm meter (1000 per volt, 10 volt scale.

* This reading is subject to considerable variation with meters of various resistances, as the voltage at this point is measured through a 500,000 ohm resistor. The voltage at the opposite end of the resistor should be 220 volts.

Speaker field resistance 1500 ohm, 110 volts.

Voltage readings were made with a 1000 ohm per volt meter, 250 volt range.
* The reading here on a set analyzer will show about 2 volts due to the fact that the 2 meg. ohm resistor is in series with the meter. To check grid voltage, drop across speaker divided by 2 will be the approximate voltage applied to gria. If plate current is about 25 mils and voltage about 220, it is safe to assume that the grid bias is O.K.