|Welcome to the W1VLF
9 Kilohertz Experiment Page
|Take a look at Stefan/DK7FC 8.97KHz Page
He started us on this journey
|The former for the resonating coil.
A commonly available concrete tube Inexpensive, light, and readily available Dimension are 12.75" diameter,
Length is 48" Material is cardboard.. Dielectric or Losses problems do you think?
|Tube is supported on both end by wooden supports with a .625" threaded rod acting as an axle. The tube is centered on the axle by rotating
the tube and observing for symmetry in on the outsider diameter.
|Here we see a very happy and very tired OM W1VLF taking a break from winding W1VLF appears happy because he is approaching the 50%
point of winding this coil. Rotating the tube with 1 hand and aligning the wire with the other . Total winding time was approximately 4 hours.
|The completed coil located in the very messy shop of W1VLF The coil is actually wound tighter than picture would suggest.
There was a lot of dust present during the winding process.. I am not sure why.
|The completed coil side view.
|The other end of the coil .. for what ever it's worth!!
|Shooting down the axis of the completed coil See I told you that was dust and not loose windings.
|178.8 Millihenries R = 60 Ohms
All that work for a lousy 178 Mhy. This very close to what I expected.
Obviously this will have to be augmented by a considerable amount of antenna "C" and a more "L" "Q" values will be posted later.
|Coil in temporary location inside the shack. Sitting on Styrofoam insulator. This is a very noisy coil!! My head hurts
Initial tests proved out well on the 5 KM path Also note the makeshift PVC tube in the center of the coil
|Screen capture of W1VLF 8.97 Khz station from the W1VD Grabber.
Jay is located at 5 Km distant from my QTH Triangle wave generated by HP 3336 set to sweep 2 Hz at 20 second rate
QRSS 10 with power out of amplifier approx 50 watts Note the nice signal trace
Thank you again Jay for all the help without which this project would not be possible
|Friday April 16 2010 TEST
|Updated on April 17 2010
|The W1VLF 129' tower located at FN31LS. The tower is about 65 feet taller than the surrounding trees. From this view the Antenna wire and
the top hat wires cannot really be seen that well. This view does give a pretty good idea of the what is around the antenna wire. The antenna
consists of 173' of #12 wire that slopes from the rear deck of the house and is pulled to the near the top of the tower by a rope and pulley
arrangement. Currently there are 2 top hat wires wire which slope away from the tower toward the viewer. The wires are roughly 150' long
each and terminate 60' and 40 feet above the ground. The total antenna "C" = approx 950 pF I am hoping to add 2 more top hat wires out
over the trees but I am not sure if this will be of any benefit because of losses in the trees. These wires could be as long as 200' each with out
touching the trees as the if I keep the ends at 70' above ground