ÿWPCº ûÿ2ÿÿ BN Z¤þRoman 12cpi#|d ç×Âdô\  @Ž„×õ X@þþþþþÿÿÿþÿÿÿÿÿÿþÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿEpson LX-850EPLX850.PRSÂdô\  @Ž„×õ XŽ7 X@ÐÐÐ ÈÈ Ðûÿ2HX`ÿÿF^¸Roman 12cpiRoman 10cpiØÿÿ‘7dddx ç×Âdô\  @Ž„×õ X@þþþþþÿÿÿþÿÿÿÿÿÿþÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ\ÿÿ‘7xxxx £VÂxô\  @Ž”×õ X@þþþþþÿÿÿþÿÿÿÿÿÿþÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿgy-turd elevator music which your local convenience/grocery store plays incessantlÿÿÿÿoring into your mind with the thousand-fanged mouths of ignorant, spotty-nosed proSo you've decided you want to fuck with your neighborhood. Or maybe just annoy your roomates during football season. Or perhaps you're getting a trifle sick of the sappy, soggy-turd elevator music which your local convenience/grocery store plays incessantly, boring into your mind with the thousand-fanged mouths of ignorant, spotty-nosed proletariat BOREDOM --- Oh. Sorry. I was starting to ramble. Anyway, you've decided that one of these things, or something similar, needs implementing in your life. You've already downloaded schematics from Dr. Rat (or WHOever) to scramble the reception of the other bozos in your area. Well, if you read this over carefully, this should be the last schematic you'll need to learn how to fuck up, play with, drown out, or just plain wipe the tv's/radios/vcrs etc. of your friends and loved ones. If you use the largest of the transistors I'll mention below, you can even diddle with OLD cordless phones (those in the 30-40 mHz range) and, yes, even cable. \/ | | +-------------------------------------------------------+ | | | | | L1 ) | / | | C ------- )___| / \ ----- C 2 ------- ) | R / ----- 1 | L2 ) | 1 \ | C | | | / | | /--------------------------------| | | | B |/ C3 --- | |------|----- |\ --- + | | | \--------------------------------| ------- \ Q1 E | --- / R \ ------- \ 2 R / --- / 3 \ | | / | | | +-------------------------------------------------------+ Resistors- Capacitors- R1 -- 22 K Ohm C1 -- 0.001 mfd R2 -- 10 K Ohm C2 -- Variable Cap (vide infra) R3 -- 100 Ohm (vide infra) C3 -- 10 pfd Coils- L1 -- Diameter=0.5", Length=0.5", air core, number of turns either two or three, depending Q1 -- any decent NPN, though for the broadest range, a 2N3053 is recommended; otherwise, the 2N3904, the MPS2222A (Radio Hack part ÔØ'0* ( (@@ÔŒ#276-2009) or the 2N2222A work reasonably well, though Radio Hack has a part similar to the latter which claims to have a 1.8 watt dissipation (I'm not sure I believe it, not in a plastic case I don't...) which works well enough. More below. Okay. That lovely design above is nothing more than the simplest possible oscillator. Because it's not made to do more than make an unmodulated carrier wave, the layout of the parts in relation to each other isn't nearly as important as it is when making, say, something meant to carry a clean signal. So just lay it out as close to what it looks like there as possible, and everything should be fine. Feel free to make it ergonomic, though; mica compression caps are a bitch to tune while holding the device in your pocket in the middle of a crowded supermarket.....Unless, that is, you superglue a little disc of plastic onto the top of the screw. I know nothing about this, of course. In essence, what this little beast does is send out an unmodulated carrier wave which nearby receivers will superheterodyne to, thereby cheating out the signal you'd like to dispel. What THAT means is that, using one of these, you can crowd out transmissions farther away (of lesser field strength) than yours, causing absolute silence (if you're using batteries) or (if you're using dirty juice, like from a DC wall adapter) a blattering, shrieky hum to emanate from the radio, TV, whatever. You can also cause *serious* fuzz on the screen, or, if you're close enough (or have enough power behind it) to the TV, you'll entirely disrupt or blot out the picture entirely. This even works on (most) TVs that are being fed by cable, or by a vcr. Hard to believe? It shouldn't be: every receiver (including a television) has an intermediate frequency, called, appropriately enough, the 'Intermediate Frequency' or, 'IF', to which every incoming signal is converted to. If you succeed in crowding out the IF, then, well..... How far away will this thing work? That depends on which transistor you use, but at worst case, using nothing but a single nine-volt battery and a ten inch piece of wire as an antenna, you should be able to cause static and other reception difficulties from thirty feet away. If you follow my instructions/suggestions below, you'll find that range GREATLY increased, easily to five hundred feet or more. Read on. The Frequency range you can cover depends on your trim capacitor; the equation is something like Frequency Range = Highest capacitance/Lowest capacitance If you have access to a good electronics supply store (or have a copy of Mouser's catalogue, which I hesitate to recommend, since I've never had good luck with their service, and what with them losing my last order...) then pick up an 8-80pf or 10-100pf micaÔØ'0* ( (@@ÔŒcompression cap. If Radio Hack is all that's in your neighborhood, then pick up their 95-420pf trim cap (part#272- 1336), even though it's kindofa piece of shit, and not as good as a lower pf/broader range cap. If you use Smak Shak's capacitor, only use two (2) windings on each of your coils, and make them fairly far apart. If you use either of the two mentioned above (or something thereabouts) then you can get away with using three turns in each coil. Notice that the coils are right next to each other, in series, with the antenna coming off from between them. Since this is nothing but a simple Splattermaster, the length doesn't matter as much as it would for serious transmission, so the longer the wire, the better....It might even be a boffo idea to solder an alligator clip to the end of the wire, so that you can just hook it up to any large piece of metal nearby... Important: if you use anything but the 2N3053, or the 2N2222 (2N2222A), then you'll want to raise the emitter resistor to AT LEAST 470 ohms, just to keep the transistor from frying itself. All the ones listed above (and plenty of others, I'm sure) are suitable for use, but ONLY if the resistor noted above is raised. Ñ#Âxô\  @Ž”×õ £VX@#Ñ Practical concerns: SO YOU WANT TO BEEF UP THE JUICE: adjust the 100 ohm resistor downwards. Try 22 ohms. Or ten. Or even none at all, dropping the emitter directly to ground. That last part works REALLY WELL, but if you do it, you MUST heat sink the transistor, and use a higher wattage©rating resistor (no less than a watt or so). Lowering the value of the emitter resistor permits the transistor to suck in more juice, thus allowing more dissipation of power. Simple, eh? And it WILL hork down the juice if you let it; at full clip, with the emitter directly to ground, it'll take in about 1.5 to 2 amps @ 12 volts DC, putting out a hefty bunch of RF into the air....Don't worry, of course....Everything you've heard about those brain tumors isn't true....Really..... When hooked up to an antenna, I'm sure that this exceeds the FCC's field strength regs (250 microvolts @ ten meters), and so is probably illegal, which is why I would never recommend doing it. Of course. Incidentally, did I mention that this file is for information purposes only...? SO YOU WANT TO BOOST THE RANGE: Since this would also fall under the regulation-violation category, I would not ever actually recommend doing it. The trick is this: make a second one (or aÔØ'0* ( (@@Ô third, if you happen to have a higher©dissipation transistor with a high enough transition frequency....And no, they don't sell them at Rat Shack) of these little beauties, except this time, substitute a 15 kilo Ohm resistor for the 22k. By the time you've made eight or ten of them for your friends, you'll be a pretty good hand with the soldering iron (that is, if you weren't already), and will have mastered the art of making them SMALL --- like, small enough to fit in a cigarette pack along with two nine-volt batteries as a powersource....Anyway, let's pretend you've made the second one; here's the trick: when you make the second, third etc., *don't* include the 10 picofarad capacitor. Why? Because that is the essential ingredient which this oscillator needs to oscillate. If you disinclude it, then the oscillator becomes nothing more than an amplifier waiting to happen.... Okay, now clip the antenna wire entirely off of the first one, and then solder a lead to the emitter (NOT the collector) of the transistor. Connect the other end of this lead to the BASE lead of the transistor of oscillator #2 (though now it is technically no longer an oscillator: it is a buffer amp.) Now take the antenna lead from the buffer amp and feed it into the base of the next stage....Ad infinitum. At least, that is, until you exceed the power rating of your transistors. Not to forget: it is a good idea, if you were to do this whole amplification thing starting with something like the 2n2222, to use the lowest-power-rating transistor as your initial oscillator, then feed that into a buffer amp using an identical transistor, and then feed THAT into a bigger transistor, etc. Doing such a thing, it is easily possible to selectively buttfuck reception within about a half-mile radius....Not that I would know anything about this. Of course. WHY? Just *think* of what you can do with a nasty little device like this....I mean, more than just annoy the neighbors when they play their radio or tv too loud. Imagine having fun busting up the TV reception at your local bar....health club.....shopping maul.....The possibilities are endless. Imagine if that piss-poor musak at your local grocer's suddenly cut off --- for no reason they could tell --- none at all! And even when they shut it down, fiddled with it, and then turned it back on, it still didn't work.....Not that YOU would still be there, of course....But your oscillator would, all taped up, together with two nine volts wired together in parallel to provide enough juice to last a day or so, and all in a little package the size of a pack of Marlboro Reds, along with about a foot or two of wire, the whole mess just where you left it,ÔØ'0* ( (@@Ô carelessly tossed beneath of the forklift flats in the toilet paper section, or taped up beneath the shelf with the lima beans on it.....Not that I would know anything about this. Of course. Either way, YOU'VE got an original, squirming brain --- USE it! A couple of technical notes, before I forget: While the 2N3053 is an attractively large transistor, it has a transition frequency of 100 megahertz. IOW, it cannot effectively be used as an amplifier for anything above that, because it reaches unity at 100mhz (what goes in is what comes out), and above that it actually LOSES power, instead of gaining it. Using it solely as an oscillator, however, provides interesting results, because if you give it enough juice, and tune it up to a high enough frequency above transition, it starts spewing out harmonics all across the board, fuzzing up everything around, and taking big bleeding swathes of the commercial FM band with it. Nice, huh? Also, don't believe all the power ratings you see: heat dissipation in watts is nothing like RF power dissipation (when dealing with AC, and especially high frequency AC, Root- Mean-Square [RMS] has to be taken into account, but that's another course lecture entirely, I'm sure...), so that even when something CAN dissipate five watts of juice into the free air, that DOESN'T mean it's dissipating even so much as a single watt RF. A half-watt, more likely. I am not including RF transistors, of course, since those are really in a special class of their own. The Thought Shop (pobox 3507 gaithersburg md 20885-3507) had absolutely nothing to do with this, but if you have any questions or, more importantly, any answers, please feel free to contact me at the above, or on most any of the NIRVANANET BBS's, where I originally posted this. Erich M. Thomas Last minute correction: There is no 'Thought Shop'; it never existed. It was destroyed. I mean it never was. If there are any complaints about the technical qualities of the above writing, please direct all correspondance to:ÔØ'0* ( (@@ÔŒ™ Senator James "Bob" Exon c/o Pus-Suckers for Christ United States Senate Washington DC 20510 The Thought Shop is, of course, mythical, and my name's not Erich, it's mud. Power to the People, and Ban the fucking bomb. Will ------ Love