Hi…I’ve followed many of the EFHW Transformer postings…and I have 3 questions I don’t recall seeing information explaining when to use one of the 3 toroid options…
I see T-6 (yellow) seems to be the predominate variety…but I also see postings for T-2 (red)…
What scenarios make sense to pick T-6 (yellow) vs. T-2 (Red) toroid?
– Multi-Frequency with a variable capacitor (ex: 17m-40m) ?
– QRP vs. QRO ?
I think understand mix FT-43 is for Broadband with a fixed capacitor - correct?
What are the scenarios to decide on a Toroid-Size? Are there generally ‘safe’ sizes for a given transmit power and mode (data, CW, SSB)?
Thanks…I appreciate the input…