12-12-2024, 11:47 PM
Hi James,
OK, there may be more than one way to operate that switch. Whatever way yours works, exercise the switch. You can check the filament of 117Z3 by ohming between pin 3 and 4 of the tube. It should be well under 100 Ohm cold. The issue with tube filaments (and light bulb filaments) is that they are not "ohmic" devices. The hotter they get, the higher the resistance.
Hope this helps.
OK, there may be more than one way to operate that switch. Whatever way yours works, exercise the switch. You can check the filament of 117Z3 by ohming between pin 3 and 4 of the tube. It should be well under 100 Ohm cold. The issue with tube filaments (and light bulb filaments) is that they are not "ohmic" devices. The hotter they get, the higher the resistance.
Hope this helps.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
