CLICK HERE FOR Q & A ABOUT DEMOS vfmdemo.htm, actual spiel and setup instructions for demonstrating the unit in public. The several Corel Draw 3 .CDR drawings referenced below will NOT display in most browsers. The idea is that you SAVE TO YOUR LOCAL HARD DRIVE each one, then print from a compatible graphics package. This method gives the clearest quality prints. ** I HAVE ALSO INCLUDED .GIF DRAWINGS, HOWEVER, DUE TO THE COARSE RESOLUTION OF MY GRAPHICS SOFTWARE, THESE MAY OR MAY NOT PRINT TO MEET YOUR NEEDS. An office services shop should be able to print the .CDRs - BE SURE THEY SELECT "FIT TO PAGE". Most recent full featured graphics packages can read and print a Corel Draw 3 (VECTOR) drawing. The entire set of .CDR files will fit on one EMPTY 1.44 MB floppy diskette. Here are the clickable references, sizes, and paper orientation. PRINTING THIS PAGE will assist the office services shop: vfmckt3.cdr (RIGHT click) 141K vfmckt3.gif (LEFT click to view, RIGHT to download) 29K vfmckt3.exe (LEFT click) 26K, when downloaded, you will need to run vfmckt3.exe as a program, and it will unpack itself as vfmckt3.cdr. The zipped version will remain on disk too. Schematic diagram, 2N2222 separate amp for spkr, LANDSCAPE orientation kitbotm3.cdr (RIGHT click) 292K kitbotm3.gif (LEFT click to view, RIGHT to download) 36K Solder side wiring layout, 2N2222 separate spkr amp LANDSCAPE orientation ** SMALLER PERF BOARD VERSION - NO BOARD CUTTING REQUIRED ** >> DRAWINGS ABOVE ARE SUFFICIENT FOR SOMEONE WHO CAN DESIGN THEIR OWN CASE AND PANEL vfmtest.gif, shows what the scope trace should look like when proper frequency modulation by voice is applied. vfmpanel.cdr (RIGHT click) 54K vfmpanel.gif (LEFT click to view, RIGHT to download) 28K Panel illustration, LANDSCAPE orientation brd2panl.cdr (RIGHT click) 28K brd2panl.cdr (LEFT click to view, RIGHT to download) 13K Shows mechanical details for mounting both the circuit board and 12-volt gel cell into a Radio Shack 270-1809 project box. vfm3.cdr (RIGHT click) 22K vfm3.gif (LEFT click to view, RIGHT to download) 37K Front PANEL layout if using the **MORE COMPACT** Radio Shack 270-1807 7" x 7" x 3" plastic project case, if wanted Return to TOP ==================================================== SAMPLE SILENT SOUND DEMO Q & A: vfmdemo.htm, for a much more complete how-to-demonstrate writeup. > Are the items in question expensive? I MIGHT be > interested in paying for a demo unit. How large > and heavy is it when finished? I estimate it could be done for about $200 US, though this would vary upwards if you had to purchase a tape recorder, say, or a frequency meter along with it. Tape recorder, a small one, is necessary. A frequency meter is not, subject to conditions below. With the largest Radio Shack plastic project box, it's 8" x 6" x 3". With the 12-volt gel cell inside, it weighs perhaps 3 lbs. > Could you briefly describe how you demo it > to curious onlookers? I keep a tape recorder with sample ordinary voice with the unit, so I can demonstrate both the 1,500 Hertz normal speech center freq. then raise the center frequency up until it is not audible. At that point, the visitor is hearing "silent sound" carrying speech, using FM rather than nature's AM. I also unplug the attenuator/patch cable from the "earphone" jack on the tape recorder, which allows the visitor to hear the ordinary voice on the tape, which is AM (amplitude modulation). Also at that point, the brain is using "slope tuning" to recover the normal voice from the inaudible signal. I tell them this is an unclassified device which can hypontize SILENTLY, show them the label with the U.S. patent #5,159,703, and tell them a unit like this was used in the 1991 Gulf War by the U.S. Army Psychological Warfare branch to persuade, silently, all those Iraqi troops to surrender so quickly. That was DOCUMENTED on ITV, and you should have for your reference (one copy, not to hand out - it's too long) the Judy Wall article at this link: http://www.raven1.net/silsoun2.htm I go on to tell them that this device gets it's REAL destructive power when connected to a voice to skull transmitter, one of which is under construction here in Ontario. It can beam hypnosis silently into someone's skull for years and they won't be aware. ** You CAN also use the Radio Shack sound level meter to show, when the frequency setting is high, that sound is coming out of the tweeter even though they can't hear it. Due to having to use the bus, I'm restricted on how much I can carry, so I haven't used this but once. (Doesn't seem to be required, actually.) But there are a couple of important caveats if you want to use a sound level meter: - Radio Shack's sound level meters are calibrated to match the human ear response. Since the demo unit can easily tune the center frequency up above 20 kHz (the meter's upper limit) you must have a FREQUENCY COUNTER with you or your sound level meter may miss your then-ultrasound signal - This demo unit, in order to pump out any kind of signal near the high end of human hearing (around 15 kHz) uses a small PIEZO tweeter, 2 inches dia. The readily available, simple, LM386 audio amplifier chip will handle this frequency, but without much power to spare, so the actual amplitude is not great at 14.5 kHz, the Lowery patent specification. Therefore, especially OUTDOORS, a demo to use a sound level meter needs an ADDITIONAL STAGE of amplification. That could be added on to the circuit board, but room is a problem with the 276-158 board, or, an amplified speaker, like the Radio Shack 21-541 would be needed for a reliably convincing sound level meter demo. (The 21-541 should also have it's low-frequency speaker replaced with a 30,000 Hz PIEZO tweeter.) The GOOD news is that so far, the sound level meter demo does NOT seem to be necessary, though I do have the equipment should that be necessary. The full demo would probably be used for a pre-arranged meeting with a group. > Are visitors instantly convinced? YES, as far as I can tell. What's more, most who stop to ask questions clearly do NOT want me to turn it on, for what they fear it might do to them. I think I've turned it on half a dozen times in the last three months.