Topband: gamma match question
George (K8GG) & Marijke Guerin
gmguerin at voyager.net
Sun Sep 24 19:18:04 EDT 2006
Further to what Paul, N1BUG, asked about gamma matching a top loaded tower
for 160 meters:
Once a 50 ohm + the inductive reactance point is found, and an appropriate
series capacitor is selected to tune out the reactance, the resonant
frequency can be moved up and down the band by reducing or increasing the
amount of series capacity.
One of the Chicago area hams used a wide spaced air variable in a weather
proof box with a stepper motor, but I prefer a vacuum variable... and would
start with 1000 pfd at 5 KV as a general guideline.
73 to all
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