[Antennas] Loading Coil Placement

[Kevin Nathan]

Hi All,

A couple of weeks ago I wrote to this group asking for feedback on shortened dipoles/inverted vee's for 160, 80 and 40.  In the interim, I found a couple of coils I had saved from an experiment about 20 years ago with a shortened 160 meter inverted vee.  Of course, the info on dimensions for that antenna are long gone.  These coils are wound on what appears to be 2 and 3/8" OD PVC which a friend had actually turned on a lathe so that the wire rests in a continuous spiral around the pipe.  It seems to be number 12 or 14 AWG about 68 turns.  I am thinking of adding these to my existing 135' inverted vee fed with 450 ohm window line.  My problem is I can't seem to find anything definitive as to where in the antenna to insert these coils.  This antenna started out as an 88' doublet to which I have added length to bring it to the present 135" length.  It would be simplest to insert these coils at the point where the extra wire was added.

I would like to get some feedback as to your thoughts concerning the feasibility of what I propose or where to insert loading coils such as these and possible overall antenna length to get the system to tune on 160.  I need to keep it somewhere around where it is now or slightly longer--I can't go the full length on 160 or I wouldn't need these coils.  <GRIN>

Thanks much in advance for your thoughts and feedback.  Very 73.

Kevin :)
Amateur Radio:  K7RX
Navy Marine Corps MARS:  NNN0SHS