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Do It Yourself (DIY) paradise for tube and SET project builders.

Heaters in series?

Don't you want a separate filament supply for each 10Y? That's usual.

As I was saying, try 126C as a plate choke - just the primaries - with a FT-2 or FT-3 coupling cap. I prefer the sound - tried it both ways. As an IT you have to connect the secondaries correctly otherwise you get treble rolloff. Primaries are red HT, blue plate. Secondaries are black grid, green ground.


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