Re: Murphy A188C repair.
I don't think it can be the sockets. If I leave the valve plugged into it's socket and supply the socket solder tags underneath with a supply straight from the transformer winding it works immediately. If I measure the voltage at the solder tags on the base with these supply wires in place i get 4 volts. Take the supply wires away and measure again i get zero. Remove the valve from socket and measure again, I get approx 4 volts. Install the valve without my own wires it disappears again.
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