01-29-2022, 01:49 PM
There should be two separate capacitors for C50 and NO connection at the red dot. Connection at the blue dot is the correct one.
It is not unusual that the volume control makes scratchy noises as it is rotated and it has nothing to do with the power supply. There is no DC blocking capacitor between the top end of the volume control and the detector circuit. When a signal is received, a DC voltage is generated by the detector and applied across the volume control. This will cause noise as the control is rotated.
Most radios have a DC blocking capacitor between the detector and the end of the volume control which minimizes the noise, but to save money some manufacturers omit the cap which eliminates the need for extra parts.
It is not unusual that the volume control makes scratchy noises as it is rotated and it has nothing to do with the power supply. There is no DC blocking capacitor between the top end of the volume control and the detector circuit. When a signal is received, a DC voltage is generated by the detector and applied across the volume control. This will cause noise as the control is rotated.
Most radios have a DC blocking capacitor between the detector and the end of the volume control which minimizes the noise, but to save money some manufacturers omit the cap which eliminates the need for extra parts.
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