There have been quite a number of posts recently requesting info on how to
match an inverted "L" or a short vertical. Most of the responses suggest
one method or another, but I have seen very few suggesting using an inductor
at the base to ground, tapped down for resonance and up from ground for 50
ohms. Same thing on ON4UN's book-I believe there is one reference to this
method of matching but many using L-networks and ununs. What is the issue
here: efficiency?
I always thought that this method worked all right, particularly if the
antenna was longer than 1/8 wavelength and top loading made it possible to
use a very small inductor at the base. The bonus seems to be that such a
configuration makes the antenna somewhat quieter on receive and may offer a
measure of protection from Thor.
Comments?
Bill, VE3CSK
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
|