Hi amigo,
The reason I chosen the 18-23 KHz range is because of the VLF or LF Longwave transmitters, the "Marconi" station in New Brunswick, NJ with the 100 KW "spark" alternator was at 17 KHz and when they got the 200KW alternator they were at a 21.8 KHz. The "Telefunken" station in Sayville, NY with its 100 KW "spark" alternator was at 9.6 KHz with two static frequency converters for doubling at 19.2 KHz and 38.4 KHz ....... so the range of 18-23 KHz. This is because of the obvious tremendous damage over 50 years to the earth below the antenna wires that were over 100 feet above the ground, in the only two areas that these radio frequency's were used as far as I can find.

The other reason is the photograph of all the scientist in front of one of the buildings at New Brunswick, NJ ..... Albert Einstein, Nikola Tesla, Charles Proteus Steinmetz, Irving Langmuir, Saul Dushman, Richard Howland Ranger, George Ashley Campbell look at their bio's if you haven't. The fact that Nikola Tesla was 65 years old in 1921 the time of this photograph I don't think he would ever make the same mistakes he made in the past and with some of the members being half his age there, something significant was happening and not some sight seeing exhibit so to speak.

The big one for me is Albert Einstein leaving Europe and coming over to New York just to be shown a radio station or possibly something very special.


Albert Einstein - Wikipedia, the free encyclopedia

Please note Einstein is wearing the same coat hat in hand maybe the same clothes as the "Marconi" New Brunswick, NY photograph.

As for the "Cosmic-Ray" collection maybe it's something like a bug zapper .... the cosmic-rays are attracted to the 18-23 KHz radio frequency like a magnet of sorts and the vacuum tubes of some type act as a solar cell collecting the cosmic-ray particles in a vacuum (vacuum tube) to be used in some type of circuit configuration to power a motor. The antennas at New Brunswick, NJ and Sayville, NY were over 100 feet off the ground and the soil damaged area below must be at least 20 feet wide, so if the antenna inside of the 12" x 24" x 6" box was 3" wide on 1/4" centers x 22" long to cover the 6 1/2" tall tube annode and cathode assemblies there would be about a 20 foot long antenna inside the box, 1-2 inches above the collection vacuum tubes. The other problem is the transmitter, for a 18-23 KHz frequency one Tesla made it by components available or two used a receiver signal from New Brunswick, NJ station it was in operation until 1955 or Sayville, NY station it operated until 1995 what ever works.

The good thing is if the frequencies are correct it can be duplicated easily with todays technology no problem at most any wattage. The collection of "cosmic-rays" if the only proven way to use them is in a vacuum, this would mean that vacuum tubes is possibly the way for some kind of viable usage.

The power for the box is really sketchy from none at all to a 12 volt battery ..... the car would need something for lights and other power requirements, there was no 12 volt battery cars at the time so a 6 volt battery would be the size and for power connections for a 18-23 KHz transmitter or receiver ??

Regards
Glen