View Single Post
  #1   Report Post  
Old August 31st 05, 04:44 AM
W2RAC
 
Posts: n/a
Default Need help to optmise a older Hy-Gain antenna for 2M SSB

PLEASE, I need help.
If anyone can run the numbers,
I have tried Quick Yagi with little success.
I have a pair of the OLDER Hy-Gain 2m antenna's. There design was a
200ohm (I think) Hairpin match (to 50ohm) with the reflector and
directors INSULATED from the boom.
Current model for the last 10+ years is the elements are not insulated
from the boom.
I want to respace the elements, possilbing cutting down as it is
easier than lenghting them, to get the best
1. Beamwith/pattern
2. FB
3. Gain.

I am only going to use them on 2M SSB with a center freq of 144.250

Here are the measurments.
14' boom
El Lgth Space
D6 34.62500 32.25
D5 35.00000 26.75
D4 35.12500 25.75
D3 35.12500 28.25
D2 35.25000 22.25
D1 35.50000 12.75
Driven 32.75000 16.75
Ref 44.37500 1.75

Notes. Measured in Inches. Reflector is mounted 1.75 inch from end of
boom, D6 is 1.5 inch from end of boom. All Elements are INSULATED on
top of the boom. If needbe I can remove 1 director as the insulator
need replacing.