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

RaOuL September 6th 03 04:25 PM


"donut" wrote in message

--SNIP--
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.


FWIW, the cost of FRS radios has come down to the level of kid's walkie
talkies. I recently bought a pair of Uniden FRS radios at WalMart for about
$17 / pair. 27 MHz walkie talkies are still around $10 a pair. I gave 'em
to my kids so they can keep in touch around the neighborhood.....

RaOuL



RaOuL September 6th 03 04:25 PM


"donut" wrote in message

--SNIP--
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.


FWIW, the cost of FRS radios has come down to the level of kid's walkie
talkies. I recently bought a pair of Uniden FRS radios at WalMart for about
$17 / pair. 27 MHz walkie talkies are still around $10 a pair. I gave 'em
to my kids so they can keep in touch around the neighborhood.....

RaOuL



Dee D. Flint September 6th 03 05:42 PM


"donut" wrote in message
...
(Limitedselection) wrote in
:

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.


You cannot control whether an antenna radiates a skywave or a groundwave.
Even with controlling the takeoff angle, you will still get some radiation
in other directions which means you will get some skywave propagation
anyway.

Due to its frequency, groundwave on CB is not a useful propagation mode.
27mhz is high enough in frequency that it does not want to follow the
curvature of the earth. It propagates mainly by "line of sight" (i.e.
straight line) and/or skywave (i.e. skip).

Dee D. Flint, N8UZE


Dee D. Flint September 6th 03 05:42 PM


"donut" wrote in message
...
(Limitedselection) wrote in
:

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.


You cannot control whether an antenna radiates a skywave or a groundwave.
Even with controlling the takeoff angle, you will still get some radiation
in other directions which means you will get some skywave propagation
anyway.

Due to its frequency, groundwave on CB is not a useful propagation mode.
27mhz is high enough in frequency that it does not want to follow the
curvature of the earth. It propagates mainly by "line of sight" (i.e.
straight line) and/or skywave (i.e. skip).

Dee D. Flint, N8UZE


Dee D. Flint September 6th 03 05:44 PM


"donut" wrote in message
...
(Limitedselection) wrote in
:

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.


This is ridiculous. Try talking skip even on a car CB putting out legal
power. It ain't gonna happen.


Happens all the time when the sunspot cycle is favorable.

Beside, the solar cycle is on it's downward spiral, and skip openings on

29
MHz are going to become few and far between and the cycle deepens.

If your local CBer is primarily a "skip" talker, that in itself might take
him out.


Unfortunately the CB operator will probably think the solution is more
power. When he gets an occasional E skip propagation, he'll think he was
correct. His use of excessive power will then aggravate the situation.

Dee D. Flint, N8UZE


Dee D. Flint September 6th 03 05:44 PM


"donut" wrote in message
...
(Limitedselection) wrote in
:

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.


This is ridiculous. Try talking skip even on a car CB putting out legal
power. It ain't gonna happen.


Happens all the time when the sunspot cycle is favorable.

Beside, the solar cycle is on it's downward spiral, and skip openings on

29
MHz are going to become few and far between and the cycle deepens.

If your local CBer is primarily a "skip" talker, that in itself might take
him out.


Unfortunately the CB operator will probably think the solution is more
power. When he gets an occasional E skip propagation, he'll think he was
correct. His use of excessive power will then aggravate the situation.

Dee D. Flint, N8UZE


Bob Lewis \(AA4PB\) September 6th 03 07:55 PM

Now, he actually has fun frustrating the offending CB'er.

That's great. So now your friend has become a part of the problem
instead of part of the solution. That makes him no better than the guy
he's compaining about.



Bob Lewis \(AA4PB\) September 6th 03 07:55 PM

Now, he actually has fun frustrating the offending CB'er.

That's great. So now your friend has become a part of the problem
instead of part of the solution. That makes him no better than the guy
he's compaining about.



James September 7th 03 01:36 AM

Why not get a pair of Motorola frs radio set (pair) at local store,
I just picked up a pair for $ 25 and a mail in rebate for $ 15 so low cost,
plus these are on uhf frequencies, no cb frequencies and low power.

Less expensive then trying to block the nasty guy on the cb.

jimboz

Limitedselection wrote:

Roy,
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.

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.

Thanks again.

From: Roy Lewallen


There's no way to make a signal stop at your property line, short of
putting a perfect shield around your property. And if you did that, you
wouldn't be bothered by your neighbor's CB anyway.



James September 7th 03 01:36 AM

Why not get a pair of Motorola frs radio set (pair) at local store,
I just picked up a pair for $ 25 and a mail in rebate for $ 15 so low cost,
plus these are on uhf frequencies, no cb frequencies and low power.

Less expensive then trying to block the nasty guy on the cb.

jimboz

Limitedselection wrote:

Roy,
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.

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.

Thanks again.

From: Roy Lewallen


There's no way to make a signal stop at your property line, short of
putting a perfect shield around your property. And if you did that, you
wouldn't be bothered by your neighbor's CB anyway.




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