[TowerTalk] Telrex Hairpin

[CubexCo at aol.com]

In a message dated 9/30/2004 12:09:34 PM Eastern Daylight Time, 
towertalk-request at contesting.com writes:
So, getting to the question:  What degradation in performance should I be 
expecting to see by virtue of not having the balun or hairpin?
================
Guys,
Remember what the function of the hairpin is - it is an impedance 
transformation component.  Check the ARRL handbook.  A multi-element yagi antenna often 
has a very low source impedance. Yagi Designs using the Haripin matching 
technique have slightly short driven element thus the input reactance is Capacitive 
(negative) and adding the Inductance of the hairpin creates a "tuned" circuit 
and transforms the original low impedance feed to more nearly 50 ohms which 
matches nicely with the balanced feed that Telrex uses (Balun).

Regards,
Norman W4QN