I used #20 PTFE for the single winding (carries the RF current) and #24-28 transformer wire for the secondary windings.? Its actually not that critical.? I used PTFE wire for the primary because I built the transformer for 100W.? You could use just regular hookup wire for 20W.

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Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

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Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

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Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

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Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

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email:? bill@...

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