Topband: Hairpin Matching Coil Questions

[shristov]

A hairpin or a parallel matching inductor should be adjusted this way:
  1. select inductance (hairpin length);
  2. adjust wire length for the desired resonant frequency.

Repeat 1 and 2 until you get SWR = 1 at the desired resonant frequency.
Do not attempt to adjust resonance via hairpin length!

But in most cases inverted L needs no hairpin,
only the wire length should be adjusted for desired resonant frequency,
and a satisfactory SWR follows automatically.

Please note that the hairpin adjustment is NOT a substitute for wire length adjustment.


73,

Sinisa  YT1NT, VE3EA