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-   -   want circuit/schematic for CB "jammer" (https://www.radiobanter.com/homebrew/21141-re-want-circuit-schematic-cb-%22jammer%22.html)

Limitedselection September 5th 03 10:00 PM

From: "-=jd=-"

Now, I'm sure both my friend and the problem CB'er are both on the wrong
side of the law. I do not endorse either participants behavior and leave
the morality of the activity up to the reader. However, I do think it's
humorous - especially to hear my friend tell it.


JD,
Thanks for the story. I would prefer to use some cheap throw-away little
circuit instead of 'good' equipment though.

An email I received told a story about a guy building a small jamming circuit
and then using a slingshot to launch it onto the target roof. The guy had made
a small parachute (like those little army men toys) to slow it's fall. The
circuit was encased in an egg shaped container (Silly Putty maybe) so it rolled
down and ended up in the rain gutter - where it sat. Apparently the gutter
sheilded the signal from the ground making it nearly impossible to locate the
device. According to the story they were searching for it with field strength
meters and such and never found it - until the next rain ... but by then it was
long dead anyway.

Thanks again.


Limitedselection September 5th 03 10:00 PM

From: "-=jd=-"

Now, I'm sure both my friend and the problem CB'er are both on the wrong
side of the law. I do not endorse either participants behavior and leave
the morality of the activity up to the reader. However, I do think it's
humorous - especially to hear my friend tell it.


JD,
Thanks for the story. I would prefer to use some cheap throw-away little
circuit instead of 'good' equipment though.

An email I received told a story about a guy building a small jamming circuit
and then using a slingshot to launch it onto the target roof. The guy had made
a small parachute (like those little army men toys) to slow it's fall. The
circuit was encased in an egg shaped container (Silly Putty maybe) so it rolled
down and ended up in the rain gutter - where it sat. Apparently the gutter
sheilded the signal from the ground making it nearly impossible to locate the
device. According to the story they were searching for it with field strength
meters and such and never found it - until the next rain ... but by then it was
long dead anyway.

Thanks again.


Limitedselection September 5th 03 10:07 PM

From: "Bob Lewis \(AA4PB\)"

How about just turning your CB receiver off?


Bob,
Excellent advice!

Would it be okay with you if I hang on to your email address so I can contact
you in the future when I need assistance solving what I believe to be complex
problems - which you will be able to solve instantly by focusing your intellect
on the exact nature of the problem and suggesting a wise, perceptive, and
simple solution!

Thanks again.


Limitedselection September 5th 03 10:07 PM

From: "Bob Lewis \(AA4PB\)"

How about just turning your CB receiver off?


Bob,
Excellent advice!

Would it be okay with you if I hang on to your email address so I can contact
you in the future when I need assistance solving what I believe to be complex
problems - which you will be able to solve instantly by focusing your intellect
on the exact nature of the problem and suggesting a wise, perceptive, and
simple solution!

Thanks again.


Paul Burridge September 5th 03 11:11 PM

On 05 Sep 2003 18:54:17 GMT,
(Limitedselection) wrote:

From: "Caveat Lector"


Further should you radiate a very low level signal -- when the 29MHz band
has good nproagation -- you will send even a low level milliwatt signal for
hundreds of miles via "skywave" (skip if you will)


Caveat Lector,

Someone else posted about skywave - I was unaware.

I wouldn't be worried about thelegal issues if skywave was not an issue. But
unfortunately it looks like with skywave any signal no matter how small can be
heard world-wide.


Indeed. There are amateurs that compete to contact every country in
the world on just one Watt or less, believe it or not. Radio is a most
amazingly efficient form of communication. There are differences,
however, between the CB frequencies, which are relatively low, and the
higher ones. CB frequency transmissions, even at very low power, can
go world-wide very readily during and around sunspot maxima. There's
much more to it than an outsider might imagine.
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Paul Burridge September 5th 03 11:11 PM

On 05 Sep 2003 18:54:17 GMT,
(Limitedselection) wrote:

From: "Caveat Lector"


Further should you radiate a very low level signal -- when the 29MHz band
has good nproagation -- you will send even a low level milliwatt signal for
hundreds of miles via "skywave" (skip if you will)


Caveat Lector,

Someone else posted about skywave - I was unaware.

I wouldn't be worried about thelegal issues if skywave was not an issue. But
unfortunately it looks like with skywave any signal no matter how small can be
heard world-wide.


Indeed. There are amateurs that compete to contact every country in
the world on just one Watt or less, believe it or not. Radio is a most
amazingly efficient form of communication. There are differences,
however, between the CB frequencies, which are relatively low, and the
higher ones. CB frequency transmissions, even at very low power, can
go world-wide very readily during and around sunspot maxima. There's
much more to it than an outsider might imagine.
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Limitedselection September 6th 03 02:38 AM

Subject: want circuit/schematic for CB "jammer"
From: "Dick Carroll;"


Limited, you're doing a LOT of a ass-uming here!


Dick,
That I am ... I ASSumed that it would not be a problem to ask for this. From a
google search I had done I saw that this did come up from time to time - but
usually the schematic was posted as a jpg - which google does not retain.
Occassionally there was a URL pointing to the location of schematics - but
these all refer to non-existant domains - or non-existant pages now. I ASSumed
that I could just ask and someone might have the information.
Apparently giving this information to someone is a crime according to some of
the replies I have received. Apparently asking for this information is a crime
according to other replies I have received. Apparently even thinking about
this topic is a crime according to some of the replies I have received.

So, to all who I did offend by asking for this information I apologize for my
thought-crime.

Big Brother loves you all.



Limitedselection September 6th 03 02:38 AM

Subject: want circuit/schematic for CB "jammer"
From: "Dick Carroll;"


Limited, you're doing a LOT of a ass-uming here!


Dick,
That I am ... I ASSumed that it would not be a problem to ask for this. From a
google search I had done I saw that this did come up from time to time - but
usually the schematic was posted as a jpg - which google does not retain.
Occassionally there was a URL pointing to the location of schematics - but
these all refer to non-existant domains - or non-existant pages now. I ASSumed
that I could just ask and someone might have the information.
Apparently giving this information to someone is a crime according to some of
the replies I have received. Apparently asking for this information is a crime
according to other replies I have received. Apparently even thinking about
this topic is a crime according to some of the replies I have received.

So, to all who I did offend by asking for this information I apologize for my
thought-crime.

Big Brother loves you all.



donut September 6th 03 08:05 AM

(Limitedselection) wrote in
:

Thanks - Mike posted about sky waves (I was unaware of), so even a
very low power device centrally located in my property would
apparently be heard world-wide - which is NOT what I want.


I hardly think this would be a problem. For one, you'd need an antenna
radiating a large proportion of skywave. Second, the CB bands are loaded
with all kinds of open carriers, whistlers, music players, etc. so your
tiny part in this would be unlikely to harm anyone.

Actually, I did want to jam the reception of the existing CB signals
on my property (at least in and around the house).

One of my neighbors uses rather 'salty' language and the local kids
use some walkie talkies around the house - I fugured that jamming the
outside signals would still allow the kids to talk due to their close
proximity.


Anything you might do to jam this CBer (like an oscillator to transmit an
OC) would also jam the walkie talkies.

1. Change the channel the walkie talkies operate on, or

2. Replace them with walkie talkies using another band. I believe there are
walkies talkies that also operate around 49 MHz.


donut September 6th 03 08:05 AM

(Limitedselection) wrote in
:

Thanks - Mike posted about sky waves (I was unaware of), so even a
very low power device centrally located in my property would
apparently be heard world-wide - which is NOT what I want.


I hardly think this would be a problem. For one, you'd need an antenna
radiating a large proportion of skywave. Second, the CB bands are loaded
with all kinds of open carriers, whistlers, music players, etc. so your
tiny part in this would be unlikely to harm anyone.

Actually, I did want to jam the reception of the existing CB signals
on my property (at least in and around the house).

One of my neighbors uses rather 'salty' language and the local kids
use some walkie talkies around the house - I fugured that jamming the
outside signals would still allow the kids to talk due to their close
proximity.


Anything you might do to jam this CBer (like an oscillator to transmit an
OC) would also jam the walkie talkies.

1. Change the channel the walkie talkies operate on, or

2. Replace them with walkie talkies using another band. I believe there are
walkies talkies that also operate around 49 MHz.



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