Center Tapped Mains Transformer as Parafeed Plate Choke - diyAudio
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Old Today, 07:07 AM   #1
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Default Center Tapped Mains Transformer as Parafeed Plate Choke

Just out of curiosity, would the attached schematic work? Perhaps channel separation would be poor?

As the plate DC currents flow on opposite direction on the primary, they cancel the magnetic flux. There should be no core saturation and inductance would remain high.

Perhaps high enough VA rating is required to get the primary inductance for decent bass? How high? Assume say 5K:8 OPT.
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Old Today, 07:44 AM   #2
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It could work but the mains transformer will have fairly low inductance. You really want your plate choke to have high inductance since the OT and choke effectively have their inductances in parallel which like resistance lowers their value at the critical bass frequencies.
I once used a Microwave Oven Transformer as a plate choke but it produced some nasty phase shifts in the bass area. You should expect the same with your proposal.

Shoog
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Old Today, 08:47 AM   #3
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I would expect very poor channel separation. How poor would depend on transformer inductance.
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