10-01-2020, 01:22 PM
(09-01-2020, 09:43 PM)Mike Watterson Wrote: An AVO style socket board doesn't work at lower heater voltages due to all the ferrite beads on the wiring.
I'm a bit mystified. The ferrite beads have no effect at DC or 50Hz for heaters. The lovely Sussex valve tester design I have almost completed uses lots and lots of beads, to stop parasitic oscillation, but seems to function just fine at 1.4V heater settings.
Can you explain this comment further?
thanks
Jeremy
Jeremy. G8MLK. BVWS Chairman. British Vintage Wireless and TV Museum Friend.
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