I have installed filter caps and will bypass the selenium rectifier with a diode and resistor.
Also am changing the power cord to a polarized one, so that neutral will always go to the chassis and hot will go to the diode and the power supply.
The switch is on the back of the volume control, with one terminal grounded, the other has a power cord lead going to it. It should be simple to clip the wire to the grounded terminal and wire the switch to the diode.
The complication is a .0047 mfd cap and a 470 kohm R mounted on the switch terminals. The other lead of the cap is soldered to the body of the volume pot. Is it there to reduce switch noise? Should it be left where it is?
The resistor I can rearrange with the neutral so that they are isolated from the switch, but I'm just not sure about that capacitor. Maybe my brain is mush tonight.
The resistor and cap network should connect from neutral side of the line to chassis. It's there to ground the chassis but not connect it directly to AC line.
Norm
:This radio is a 1959 AM/FM ACDC type, plays very nice.
:The schematic I found in Bietman's 1960, page 175.
:
:I have installed filter caps and will bypass the selenium rectifier with a diode and resistor.
:Also am changing the power cord to a polarized one, so that neutral will always go to the chassis and hot will go to the diode and the power supply.
:The switch is on the back of the volume control, with one terminal grounded, the other has a power cord lead going to it. It should be simple to clip the wire to the grounded terminal and wire the switch to the diode.
:The complication is a .0047 mfd cap and a 470 kohm R mounted on the switch terminals. The other lead of the cap is soldered to the body of the volume pot. Is it there to reduce switch noise? Should it be left where it is?
:
:The resistor I can rearrange with the neutral so that they are isolated from the switch, but I'm just not sure about that capacitor. Maybe my brain is mush tonight.
:Hi John
:
: The resistor and cap network should connect from neutral side of the line to chassis. It's there to ground the chassis but not connect it directly to AC line.
:
:Norm
:
:
::This radio is a 1959 AM/FM ACDC type, plays very nice.
::The schematic I found in Bietman's 1960, page 175.
::
::I have installed filter caps and will bypass the selenium rectifier with a diode and resistor.
::Also am changing the power cord to a polarized one, so that neutral will always go to the chassis and hot will go to the diode and the power supply.
::The switch is on the back of the volume control, with one terminal grounded, the other has a power cord lead going to it. It should be simple to clip the wire to the grounded terminal and wire the switch to the diode.
::The complication is a .0047 mfd cap and a 470 kohm R mounted on the switch terminals. The other lead of the cap is soldered to the body of the volume pot. Is it there to reduce switch noise? Should it be left where it is?
::
::The resistor I can rearrange with the neutral so that they are isolated from the switch, but I'm just not sure about that capacitor. Maybe my brain is mush tonight.