Addendum to "Schematics for building a broad band frequency jammer"

I can't speak for others, but no amount of money would convince me to sell out my own ethics so easily.

I suggest you involve your local police. There are likely noise ordinances in your area which your noisy neighbor may be in violation of.

--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
(Known to some as Bruce Lane, ARS KC7GR, 
kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com
"If Salvador Dali had owned a computer, would it have been equipped
with surreal ports?"

I see no reason to try and jam the entire band. Just put together a simple FM transmitter and as someone earlier suggested, transmit a squeal or something equally irritating over whatever station they're listening to. As M->P suggested, that will be far easier to accomplish technically. If you need schematics for a simple FM transmitter that's very easy to build, yet very effective I can help you there. I've built and used several on this design. In fact, there's a drag strip in GA using a transmitter I built off of this schematic using it to transmit race stats so people can listen in their cars and with head sets so they can hear over the loud car exhaust. Also got the board foil design and component layout making it super simple to build if you want to go the professional route.

--
I believe that soliciting for illegal services is, in itself, illegal.

I thought the person already had a transmitter

Oops... didn't read all the way down, now did I. :-)

The person said the PO was 5 watts. That sounds like a home brew unit. I used to own a 50 watt exciter. It was responsible for generating the FM frequency, modulating it, and amplifying it to 50 watts where it was originally designed to feed a 5000 watt commercial transmitter. It made a pretty decent little pirate radio station. I built a J-pole antenna out of some wire and PVC tubing and I got about a 5 mile radius with full quieting. Called the station WEED, muhahwahahahah.

You will only get yourself in more trouble by jamming their radio. They can come over and beat you up if/when they find out who is jamming. You can go to jail or pay heavy fines when the authorities discover you, and they often need only a few seconds to pinpoint the source of an offending radio transmission.

A much better alternative is to increase the sound isolation between you and the neighbor.

Use some wooden planks to build a frame which covers the wall(s) to keep the construction steady. Put sound isolating material in the frame, use heave cloth type of materials, like heavy old type mattrasses (not foam plastic), different types of mats, wool blankets, etc.

Fiber board is also good, combined with thick layers of heavy textiles on both sides. Put heavy mats on your floor if the sound comes from there. Build an inner ceiling if the sound comes from up above.

After soundproofing your apartment, or parts of it, you can use your own sound source to create a low volume but masking effect which means you hear a lot less from your neighbors because you have your own favorite music running day and night.

Another alternative is to talk to them and tell them to stop disturbing you. That will work if they are actually trying to make you do that. There are lots of religious people who are actively trying to make their neighbors strong minded so they can come to God or something like that.

A problem with that approach is that they will probably only be encouraged by that and start other manipulations to force you to become even stronger. So you will end up with your brain filled up by the holy wrath, or the holy spirit, just like their brains.

--
Roger J.

Hehehe. The little unit I was describing is good for about a mile radius with a properly tuned vertical dipole. I've used one in a convoy so everyone in the group could listen to the same jams on the trip.

Let me run to my office (where it happens to be), grab it and scan it then I'll stick it on one of my web servers and post a URL.

What's the power input to the final and what final amp ?

9 vdc keeps it legal, but it'll take considerably more. As far as the final... ugh... IIRC the final was a 2N3096, but I'm not sure now. It's been quite a few years since I did anything with that print. Will post when I've got it up.

Hmm that 2N3096 is just a little what, 500 mw max ?

IIRC what I had had a single stud mounted MRF 315. 4 watts input, 40 something out on a 28 volt Vcc.

Don't recall now. Was thinking the 2N3906 would handle 1.5 W, but my books are at the office... and that may not have been the final anyway. I just don't remember. I do recall that heat dissipation, not max VCEO was the limiting factor on the power output and hence input voltage. Will post when I have it.

The nice thing about this little gadget is that it can be built on a board the same size as the 9v battery driving it making for a very compact unit and it'll still make a mile with a decent antenna. Actually, I've got plans for much smaller transmitters designed for use as "bugs" that aren't much larger than the 2032 button cells that drive them although the range is considerably less. I've never bothered to assemble one though. This sort of thing would be just an experimental toy to me as I have no real use for such.

I've seen those things in -kit- form. Some with stereo output. 9 volts keeps the power under the legal limit but crank it up to 15 and it doubles. I set up one for a guy who had a drive-in restaurant. He had a 50's theme and wanted to broadcast 50's music for the drive in customers. Worked pretty decent once I found a spot that had no other local stations.

very easy to build, yet very effective I can help you there. I've built and used several on this design. In fact, there's a drag strip in GA using a transmitter I built off of this schematic using it to transmit race stats so people can listen in their cars and with head sets so they can hear over the loud car exhaust. Also got the board foil design and component layout making it super simple to build if you want to go the professional route.

How or where do i obtain the schematic and cb layout ?? dnw snipped-for-privacy@yahoo.com

--
---
don ward

Ya, exactly the same thing I did for the drag strip. This wasn't a kit though. I don't recall who did the circuit design or where I got it from but it was just a schematic and description. I did the board foil design for it on a computer several years ago and built a few.

Last board I did was a little deal that sensed which of two assembly lines were down and then paged the right group of Millwrights to come fix it. It was just something to sense motion or the lack of it, then drive a two channel paging radio and some Motorola Page Boy pagers. Oh and I re-crystaled the pagers to match the channels on the radio. As far as I know that system is still being used today. I deployed it over 10 years ago.

Before that I built a DTMF generator box to phreak phones with. Copied it from a real working Black Box. Ripped off everything I needed from Radio Shack. Board, etch pen, acid,

741 op amps, everything even the case and touch tone pad. I ended up destroying it when my Greek buddy got popped by the FBI. While he had the original black box, he taped his girlfriend's back in Greece phone number on a reel to reel tape recorder. Then to call her, he would just hold the phone up to the speaker. Couldn't use a little portable recorder, too much wow and flutter to reproduce a steady enough pair of tones. The FBI never knew about what I had built, just the tape.

Legal on the FM band is about 30 nanowatts.

47 CFR 15.239 "shall not exceed 250 microvolts/meter at 3 meters".

Mark Zenier snipped-for-privacy@eskimo.com Washington State resident

: On Sat, 18 Sep 2004 12:31:40 -0400, Me : ,wrote: : :: On Sat, 18 Sep 2004 12:07:02 -0400, "Meat-->Plow" :: wrote: :: ::: On Sat, 18 Sep 2004 10:57:11 -0400, Me ::: ,wrote: ::: :::: On 18 Sep 2004 07:41:24 -0700, snipped-for-privacy@gmail.com (Nina) wrote: :::: ::::: I'd like to clarify something that I've missed: ::::: I'm ready to pay for your help if needed. ::::: TIA ::::: Nina ::::: snipped-for-privacy@gmail.com :::: :::: I see no reason to try and jam the entire band. Just put together a :::: simple FM transmitter and as someone earlier suggested, transmit a :::: squeal or something equally irritating over whatever station :::: they're listening to. As M->P suggested, that will be far easier :::: to accomplish technically. If you need schematics for a simple FM :::: transmitter that's very easy to build, yet very effective I can :::: help you there. I've built and used several on this design. In :::: fact, there's a drag strip in GA using a transmitter I built off :::: of this schematic using it to transmit race stats so people can :::: listen in their cars and with head sets so they can hear over the :::: loud car exhaust. Also got the board foil design and component :::: layout making it super simple to build if you want to go the :::: professional route. ::: ::: I thought the person already had a transmitter :: :: Oops... didn't read all the way down, now did I. :-) : : The person said the PO was 5 watts. That sounds like a home : brew unit. I used to own a 50 watt exciter. It was : responsible for generating the FM frequency, modulating it, : and amplifying it to 50 watts where it was originally : designed to feed a 5000 watt commercial transmitter. It made : a pretty decent little pirate radio station. I built a : J-pole antenna out of some wire and PVC tubing and I got : about a 5 mile radius with full quieting. Called the station : WEED, muhahwahahahah.

woah, now there's a coinkidence!

is a 70 watt pirate here I'm allegedly helping out with...

-- Steve Leyland mhm32x16 Smeeter#24 WSD#41 flower: three 6 four 9 five 8 eight 9 Alcatroll Labs Inc (bongwater maintenance dept)

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