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PJL · 18th May 2018, 11:23 am

Circuit attached. Any RF guys able to provide an explanation of how the 'gyroscope' works? The black L1/L2 are the aerial coil, L3/L4 the anode coil and the black lines are the switches that are operated over half the turn.

I can only assume the shorted turn reduces the effective area of the coil? If this is the case the inductance should fall as it moves to parallel?

Is there any possibility the coil is not conventionally wound? Does anyone have a Type 31 or 41?

18th May 2018, 11:23 am	#2
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Marconiphone Type 41 Circuit attached. Any RF guys able to provide an explanation of how the 'gyroscope' works? The black L1/L2 are the aerial coil, L3/L4 the anode coil and the black lines are the switches that are operated over half the turn. I can only assume the shorted turn reduces the effective area of the coil? If this is the case the inductance should fall as it moves to parallel? Is there any possibility the coil is not conventionally wound? Does anyone have a Type 31 or 41? Attached Thumbnails