Thanks! very good. The ~ 17 ohms is the lamp and dropping resistor? inside the manual fine tune encoder. Im seeing another 10 ohms cold load thru the Gpio boards apparently to or from the Xtal Oven oscillator.
Just wanting to verify it is not a circuit fault as some fault caused G-K shorting of the 5.25 v protect SCR. It might just be a bad SCR.
