I'm working on the design of the Pi network for a 4-1000A linear (160, 80, 40
and 20 M only), plate resistance is 5500 ohms,
The inductance for 160M is 39.2 uH. I'm planning on using a ceramic former
3.5" by 6.5" (31 T #10 Thermaleze spaced over 6").
That part is easy. I have a couple questions about taping the coil for the
higher bands. For 80M the inductance required is 19.6 uH, half the 160M value.
So I assume that if I tap the coil at the 50% point I'll have 19.6 uH. Do I
need to give any consideration for the end effect of the shorted out portion of
the coil? Whatever the answer I assume it will apply for the higher bands (40
and 20).
Thanks guys and 73, Wayne N1WR
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