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PJL · 5th Sep 2019, 4:19 pm

There are multiple taps for some standard voltages. I am not sure if this is related to the valve manufacturers specification or the loading on the LT transformer although I expect the latter. I have also not checked to see if the tester intentionally runs with a low LT (-5%).

5th Sep 2019, 4:19 pm	#128
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Mullard Valve Tester Card Project There are multiple taps for some standard voltages. I am not sure if this is related to the valve manufacturers specification or the loading on the LT transformer although I expect the latter. I have also not checked to see if the tester intentionally runs with a low LT (-5%).