|160 Meter Inverted L on a small City Lot, uses a compost cone at the bottom to
protect the remote antenna tuner, power and RF are carried to the antenna using
RG8 coax bured under-ground written December 2nd 2016
|Part of the "business end"of the remotely
tuned Inverted L. Part of the pipe is steel pipe
about 1.5 inch diameter fence tubing made of
galvanized steel bought at a Home Depot
store. The top 18 feet or so is a fiberglass
tube structure that has been protected from
the sunlight using brown colored electrical
The top of the structure is about 32 foot high
and is rugged enough to stand up to the wind
and the elements. The wire for the inverted L
is insulated nr. 14 guage stranded electrical
The bottom of the mast goes to ground but is
part way suported with a 4 by 4 inch post that
is in the ground and a support bracket.
The RT-11 remote antenna tuner is about 2
foot up off the ground and is shrouded in
plastic sheeting and furthur protected with a
compost cone that I bought at a yard sale.
|Below pictured the other end of the Inverted L goes up to the tower/mast beside the
back of the house. - I now have 2 HF wire antennas and they sort of run parallel to each
other in places and are only about 4 feet or so apart in places as well.
This Inverted L with loading coils does tune the whole of 160 meters with the remote
antenna tuner and I plan to use this antenna this winter on 160.
|The mid point of the LNR precision end fed antenna is visible (there is an 18 inch
wire hanging down) which helps tune one or more of the 4 bands it was designed
for (40, 20, 15 and 10 meters). The inverted L wire runs by and in parallel (in
places) and has the homebrew loading coil more or less in the middle of the
inverted L radiator. I made the loading coil out of a high gain light weight plastic
antenna insulator that I layered with fiberglass tape to form the "form" for the
loading coil. I then wound on a single layer of insulated nr 14 house wire and then I
weatherproofed the coil with a good quality of electrical tape. See pictures below
of the coil construction. --- With this single loading coil the antenna would not load
up on 160 with my RT-11 remote tuner. Not enough inductance. So I added an
additonal inductor and got it to work the whole 160 meter band (in tests).
Now I have to put it on the air and see how it performs on 160.
To SEE A YOUTUBE MOVIE of my Inverted L see the
following link above.
IF you check out my You Tube Channel under my name:
Earl Andrews -- you can see my other movies about ham
radio antennas as well.
|THIS ARTICLE IS UNDER CONSTRUCTION (as noted:
December 2nd 2016) - I will be adding more pictures
and information and performance data in the next few
weeks ..73 earl ve3ab
|This "garage sale" compost bin is now sealed up with plastic and electrical tape to keep the snow
from building up around the LDG RT-11 remote tuner.
MORE PICTURES AND INFORMATION WILL BE POSTED HERE SOON.
BE SURE TO CHECK OUT THE MOVIE ON YOU TUBE https://www.youtube.com/watch?v=1jfqgpEmrP4
|24 uh coil inserted at the 6 foot mark on the radiating element of wire. This is sufficient enough inductance when combined with the other inductor
that I used up in the air at about the 45 foot mark on the radiating element.
I tested this antenna in the Stew Perry Operating event/contest Dec 17 2016. I worked most of the stations I called and it seems the antenna is
"getting out". More evaluations will be done this winter.
|Above the coil tapped off at around 24 uh inductance value. I used some coil stock from my "junkbox" and these coil taps which I had bought
a while back on ebay. I do sell (at Netty Electronics dot com) my commercial web site.. Parts like these coil taps if you wish to buy some from
me in order to make up an inductor.
|I used an empty coffee jar to shield
the coil from the elements and it
worked very well for me. It is
December 2016 when Im writing
this article and we've had several
snow falls now.
|This article is still being worked on (23 December 2016)- I plan to present
some more facts and pictures and some results from my operating on 160
meters using this antenna. Also..I use this antenna to listen on the
broadcast band and I plan to listen on low wave bands with it as well.
thanks 73 earl ve3ab