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Where to add auxiliary jack for Philco 650X
#4

You can use a DPDT switch.  One pole to switch Audio Input from radio to Aux, the other to short the output of the radio (Junction of C50 and R51) to ground.  This does not damage the circuit because the output resistor is 100K Ohm.

I m a little too uncoordinated and a little too lazy to draw the circuit, but here is a sippet from the Zenith 6S27 / 6S52 Schematic showing the idea
   

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Best Regards, 

MrFixr55


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RE: Where to add auxiliary jack for Philco 650X - by MrFixr55 - 07-29-2025, 07:16 PM



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