10-24-2010, 06:24 AM
Hi
The tone control on Philco sets of that era were designed to cut the highs to a greater or less degree.
Hold the phone. I think you have made a mistake. The earliest 16 tone control used a 0.5 and 0.15 uF caps in a metal container, external to the tone control, and .09 and .006 uF caps inside the control. This was changed later to a bakelite block containing two .025 uF caps external to the control (part no. 7653-C), along with .09 and .003 uF caps inside the control.
I think yours should have the .09 uF inside the control along with the .003, not 0.9 uF. Also, the .25 uF caps should be .025 uF.
With cap values that high, it is no wonder the tone control is ineffective except on the last (fourth) position.
With each "click" of the control, the highs should be cut gradually more and more. The control does work as advertised with .09 and two .025 uF caps. You can use 0.1 uF to replace the .09 uF cap.
The tone control on Philco sets of that era were designed to cut the highs to a greater or less degree.
Hold the phone. I think you have made a mistake. The earliest 16 tone control used a 0.5 and 0.15 uF caps in a metal container, external to the tone control, and .09 and .006 uF caps inside the control. This was changed later to a bakelite block containing two .025 uF caps external to the control (part no. 7653-C), along with .09 and .003 uF caps inside the control.
I think yours should have the .09 uF inside the control along with the .003, not 0.9 uF. Also, the .25 uF caps should be .025 uF.
With cap values that high, it is no wonder the tone control is ineffective except on the last (fourth) position.
With each "click" of the control, the highs should be cut gradually more and more. The control does work as advertised with .09 and two .025 uF caps. You can use 0.1 uF to replace the .09 uF cap.
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Ron Ramirez
Ferdinand IN
