K4LCD Ham projects:
1. 160/80M receive antennas. WA2WVL designed switchable directional raised 4 x EWEs:
After optimizing, on two bands should get:
1.85Mhz G= -35dbi F/B=46db Z=962-j73
3.8Mhz G= -24dbi F/B=22db Z=916-j53
R=1000 ohms, Termination Resistor.
S=25 (Base length of each diamond)
H1=25 (Height of central pole)
H=7 (Height of bottom of antennas)
EWEs pointing 020, 200, 110, 290 degrees (Approx);
Installing four WA2WVL designed switchable directional raised EWEs. (Estimated completion: 08.14.2011). Note: This project was successfully completed as scheduled with the help of Jorge Molina KD4JM who came with his nephew Alfredo from West Palm Beach; David Ternent KP4EOR; and Manuel Corp WD4ACJ. K4LCD's XYL Ofelia offered refreshments and a delicious multi-cultural lunch. Thank you very much.
EWEs are elevated 7' .
Mast is Fiberglass, Military Surplus, camouflaged used for tents. 7 x 44" sections were used. (Purchased at Hamfest).
Guyed with Nylon/propylene 3/8 rope from sixth level section.
4 x loops (made from monofilament insulated AWG 14 copper wire purchased at Home Depot.)
Blue box (dscn04045.jpg) contains four relays and four x 10/1 baluns. Made by Floyd WA2WVL
Com Tek Box ( dscn0408-2.jpg) to remote shift directional loops from shack. Modified by Floyd WA2WVL.
4 x termination resistors used 910 Ohms.
4x4x4' PT, pole clamps and 4x4 x 30 " nail/bracket driven into ground all from Home Depot.
Following the installation of the system, we are planning to get together again to optimize each of the loops. (Elevation Plot); (Azimuth Plot).
2. Installing a PTT activated vacuum relay to connect/disconnect the 160/80M transmit antennas in order to detune them from the receive antennas.
3. Redesign and install again "shunt" fed verticals for 80/160 using existing Rohn 45G tower and 95 radial ground system. Requires to motorize and remote control existing Jennings 25-1000 picoF variable ceramic capacitor; remote switching shunt verticals from 160M to 75/80M and viceversa.
Request and welcome assistance from Hams that have the technical knowledge and ability to help make these projects a reality.
Please contact me at: juangranados@bellsouth.net