REGULATOR No. 1 and 1A
Regulator No. 1
Three more plug points, which are strapped together, are provided at the other end of the long side of the board so that reversal of the regulator board in its jack will remove it electrically from the telephone circuit. All the printed wiring plug terminations are coated with a thin layer of solder to provide good contact with the jack springs when the regulator is plugged in.
In the original regulators the Resistor, Bulb was clear and when it illuminated there were complaints from users of red coloured telephones that the insides looked on fire. Because of this, the Resistor Bulb was coated in a black paint.
Used in the Telephone No. 706.
Regulator No. 1 front and rear views
Regulator No. 1A
Regulator No. 1A front and rear views
Last revised: December 06, 2023