[TowerTalk] Fwd: FW: Adding 160 to an 80M dipole?

[Hans Hammarquist via TowerTalk]

Matt, Larry & the rest of us,


Jean-Jacques ON7EQ has an excellent web side for various projects but he is placing the capacitor inside his trap coil. It will there be exposed to a high magnetic field just like screws, nuts etc surrounding the coil. He even remarks that the capacitor gets hot during high power operations.



The solution for this is to place the capacitor outside the coil instead of inside. An other solution would be to make a  toroide shaped coil, thereby reducing the magnetic field further, a hard task to do in a simple way.


Just a suggestion from,


Hans - N2JFS



-----Original Message-----
From: Matt <maflukey at gmail.com>
To: towertalk <towertalk at contesting.com>
Sent: Tue, Dec 16, 2014 10:51 pm
Subject: [TowerTalk] FW:  Adding 160 to an 80M dipole?


Coax traps are relatively easy to make.  Check out ON7EQ's website for more info 
& links to design software.

Hope this helps.
Matt
KM5VI

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Larry 
Banks
Sent: Tuesday, December 16, 2014 7:17 PM
To: YCCC Mail; Ham - Tower Talk
Subject: [TowerTalk] Adding 160 to an 80M dipole?

Hi all,

The ARRL 160 contest got me interested in 160.  I would like to add loading 
coils and additional wire to my 80M dipole at my QTH in Maine to see how that 
might fly.  (It would make it an 80/160 dipole.)  Yes – it won’t fly very well, 
and be narrow band, but it will be easy to do and better than nothing.  I have 
looked in the ARRL Antenna Book and Low Band DXing and have found little of 
help.  I do have one article from July 1992 QST by W8NX that looks to be 
helpful.

Any ideas or pointers to how this might be accomplished? 

73 -- Larry -- W1DYJ


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