Ham Antennas!


Information on some of my ANTENNA related projects

-To see my "Retierd Antenna related" section, click on the "RETIRED ANTENNAS" link.


In this section of my web page, you will find images and some limited data on both MOBILE and FIXED ham antenna installations and/or projects.



HF Mobile Antenna Mounts

-For more info and pictures on the MOBILE ANTENNA MOUNTS, click on the "Mobile Antenna mount fabrication" here.



HF Base Station antenna installations

Three antennas are now in use for the radios in the family room. Two are HORIZONTAL LOOPS. I also have a simple 75 meter DIPOLE, which has proven VERY valuable for me, as it would act as my "reference antenna," when I was trying different designs and layouts. Both of the loops are one wavelength (1WL) antennas, and are HORIZONTALLY POLARIZED LOOP designs. One is made up as a one-wavelength (1WL) antenna for 160 meters and the other is a 1WL for 75 meters.

One wave-length 75-Meter Loop Antenna (My FAVE!!)

After wasting a LOT of time and effort, I now realize that a LARGE LOOP antenna is just not for me. I have now learned to run the 4NEC2 ANTENNA MODELING application! (I should have done this last year!) -I had a 1050 foot loop erected before; It was a five-sided antenna, and REALLY LOOKED SUPER! Almost all assured me that it was "as good as I could make it." ButÉ (Here's where the part about LEARNING how to model an antenna, and then READ the information that is presented, comes in!) The large loop was good for DX, but my needs were to cover the local area on 75 meters, and reach the coasts of then USA on 20 meters. The large loop has a "hole" straight up, as the modeling confirmed. -In other words, NO NVIS action for 75 meters. (And, of course, we NEED NVIS, if we want to cover the local area on 75 meters!) Bottom line: This much smaller 75 meter loop works nicely on 75 and also very well on 20 and 17 meters; -It gives me what I had wanted. (It's a KEEPER.)

Above: This antenna works VERY WELL! It is about 35 feet off gather ground. It is fed with about 134 feet of 450 Ohm window line. (This picture was taken looking WEST. -The HOUSE is off to the left.)

The mast at the LEFT is a simple push-up (guyed) mast that is 50 feet tall. The three masts on the RIGHT are 38 feet tall. The base is made from TREATED 4x4 inch WOOD. The top is made up with three pieces of EMT tubing. The top part is on a HINGE, so it can be tilted down for access, if needed.

-For more info and pictures on the MAST CONSTRUCTION, click on the "Mast construction fabrication" link.

All three antennas that are "close" to the East end of the house all come to a RELAY BOX. The relay box is in the garage, and it's relays are controlled vis a USB connection to an iMac in the family room. (This is very close to the "relay Box.")

-For information on a USB-controlled "antenna switching" relay box, click on the "Relay box pictures" link.





SOUTH 160-Meter Loop Antenna

Loop antenna

Above: This is my SOUTH 160-Meter loop antenna. It averages about 35 feet high, and is fed with about 80 feet of 450 Ohm ladder-line. The ladder line is attached to a 4:1 balun at the West end of the house's roof. A 30 foot run of RG-8 coax runs into the basement shop, to an antenna switch and HF radio.


Loop antenna

Above: This is the feed point of the SOUTH 160-Meter loop antenna. The center insulator is store-bought and will provide the needed strain relief for the ladder line.

-To see my "Retierd Antenna related" section, click on the "RETIRED ANTENNAS" link.