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Old April 20th 08, 02:31 PM posted to rec.radio.amateur.antenna
Buck[_2_] Buck[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
Posts: 118
Default Linear decoupling traps


Yes indeed, the simulation verified that my FINAL PLAN is working OK
Two very clean resonances at 3.6MHz and 10.1MHz SWR abt 1.3 on both bands
Antenna length only 26m instead of normal 41m for 80m dipole.
For the stub section I used 0.003m=3mm spacing and 1.5mm insulation on 1mm
wire DielC 2.6.

Is there any possibility in EZNEC to calculate how long is quarter WL on
10.1MHz
with these stub variables?

By using transmmission line objects it could have been possible to use the
VF of line 0.73.

I did run out of segments to simulate tri-band version with additional
parallel dipole.

All simulation was made in free space and probably needs some minor tuning
in real life.

73 Jouko OH5RM



Do you have the ARRL version of the demo, or just the one downloaded
from EZNEC?

If you have the ARRL version, you can modify a sample design and get
all the segments you need; you just can't save the antenna.


--
73 for now
Buck, N4PGW

www.lumpuckeroo.com

"Small - broadband - efficient: pick any two."