19-09-2016, 06:53 PM
(This post was last modified: 19-09-2016, 06:54 PM by Geordie McBoyne.)
The general performance of the set has been improved by replacing the original finned metal rectifier with a silicon diode. The HT voltage is now 205V, up by 40 volts. The EHT is now 11KV, 2KV below the figure quoted in the service manual.
The new rectifier diode along with the surge protection components are mounted on a bracket and is similar in concept to the assembly that was used by Rediffusion to replace the RM4 type of metal rectifier employed in many of the companies' sets.
The attachment shows the original HT rectifier and the replacement assembly.
Components used are a BY127 diode, a 22ohm 7 watt resistor, a 0.1microfarad capacitor and a 0.001 microfarad capacitor.
Geordie McBoyne.
The new rectifier diode along with the surge protection components are mounted on a bracket and is similar in concept to the assembly that was used by Rediffusion to replace the RM4 type of metal rectifier employed in many of the companies' sets.
The attachment shows the original HT rectifier and the replacement assembly.
Components used are a BY127 diode, a 22ohm 7 watt resistor, a 0.1microfarad capacitor and a 0.001 microfarad capacitor.
Geordie McBoyne.
