Looking to block / jam VHF frequencies.

[John Fields]

On Mon, 01 Jun 2009 12:19:16 +0100, Eeyore
<rabbitsfriendsandrelations@notcoldmail.com> wrote:

..
..
..

BTW, distance is related to receiver sensitivity, NOT transmitter output.

Huh???

JF

 

[John Fields]

On Fri, 29 May 2009 21:41:34 +0100, Ajax <borat_deletethis_@ez25.org.uk>
wrote:

Sjouke Burry wrote:

Looking for free lodging from the government?

We have a few empty jails in the Netherlands

It's for a home project... maybe I shoulda mentioned that

---
What's the project?

JF

 

[Jeff Liebermann]

On Mon, 01 Jun 2009 01:09:15 +0100, Ajax
<borat_deletethis_@ez25.org.uk> wrote:

greenpjs@neo.rr.com wrote:

In other words, someone in your house is listening to an FM station
you don't want them to listen to? Buy an FM modulator meant to play
your ipod through your car radio or stereo, set it to the desired
frequency, and then place it near the antenna of your receiver. Or is
it your neighbor that plays a particular station too loud?

LOL, they are other good applications of this project.

Such as?

The ipod transmitter may only be good for a few metres, which is fine
but what if I wanted it to go further or through a few obstacles (walls
etc)? That wouldn't really be up to it??

Ok, more power. I might as well become part of the problem.
Search for "lower power FM transmitter".
<http://www.ramseyelectronics.com/fm/>
<http://www.ramseyelectronics.com/hk/default.asp?page=amfm>
Be the first on your block to dominate the airwaves.

As others have mentioned, what you're suggesting is illegal. However
it won't work. If the intended victim is playing their FM radio too
loud, they'll just switch to MP3's, internet radio, or satellite
radio.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Sylvia Else]

Jeff Liebermann wrote:

On Mon, 01 Jun 2009 01:09:15 +0100, Ajax
borat_deletethis_@ez25.org.uk> wrote:

greenpjs@neo.rr.com wrote:

In other words, someone in your house is listening to an FM station
you don't want them to listen to? Buy an FM modulator meant to play
your ipod through your car radio or stereo, set it to the desired
frequency, and then place it near the antenna of your receiver. Or is
it your neighbor that plays a particular station too loud?
LOL, they are other good applications of this project.

Such as?

The ipod transmitter may only be good for a few metres, which is fine
but what if I wanted it to go further or through a few obstacles (walls
etc)? That wouldn't really be up to it??

Ok, more power. I might as well become part of the problem.
Search for "lower power FM transmitter".
http://www.ramseyelectronics.com/fm/
http://www.ramseyelectronics.com/hk/default.asp?page=amfm
Be the first on your block to dominate the airwaves.

As others have mentioned, what you're suggesting is illegal. However
it won't work. If the intended victim is playing their FM radio too
loud, they'll just switch to MP3's, internet radio, or satellite
radio.

Yes, clearly what he needs is a small EMP generator.

Sylvia.

 

[Sylvia Else]

Bob Larter wrote:

Ajax wrote:
Cross-posted to sci.electronics.repair / misc, as I didn't know which
one would be most appropriate.

Anyone know of a RF noise generator / jammer, that could operate in VHF
frequencies? Preferably in UK / Europe. Ideally a radius of 20-30 metres
. Even a circuit for a home-build may do, although I am lazy

You know that that sort of thing is illegal just about everywhere, right?

But how many of us would look the other way if it were a device for
preventing mobile phone use on public transport?

Sylvia.

 

[Ron]

Sylvia Else wrote:

Bob Larter wrote:
Ajax wrote:
Cross-posted to sci.electronics.repair / misc, as I didn't know which
one would be most appropriate.

Anyone know of a RF noise generator / jammer, that could operate in VHF
frequencies? Preferably in UK / Europe. Ideally a radius of 20-30 metres
. Even a circuit for a home-build may do, although I am lazy

You know that that sort of thing is illegal just about everywhere, right?


But how many of us would look the other way if it were a device for
preventing mobile phone use on public transport?

Sylvia.

It`s not 'horrorfag' MI5 agents doing unspeakable thngs outside his
window is it? ;^)

 

[JB]

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:004216f3$0$8107$c3e8da3@news.astraweb.com...

Jeff Liebermann wrote:
On Mon, 01 Jun 2009 01:09:15 +0100, Ajax
borat_deletethis_@ez25.org.uk> wrote:

greenpjs@neo.rr.com wrote:

In other words, someone in your house is listening to an FM station
you don't want them to listen to? Buy an FM modulator meant to play
your ipod through your car radio or stereo, set it to the desired
frequency, and then place it near the antenna of your receiver. Or is
it your neighbor that plays a particular station too loud?
LOL, they are other good applications of this project.

Such as?

The ipod transmitter may only be good for a few metres, which is fine
but what if I wanted it to go further or through a few obstacles (walls
etc)? That wouldn't really be up to it??

Ok, more power. I might as well become part of the problem.
Search for "lower power FM transmitter".
http://www.ramseyelectronics.com/fm/
http://www.ramseyelectronics.com/hk/default.asp?page=amfm
Be the first on your block to dominate the airwaves.

As others have mentioned, what you're suggesting is illegal. However
it won't work. If the intended victim is playing their FM radio too
loud, they'll just switch to MP3's, internet radio, or satellite
radio.


Yes, clearly what he needs is a small EMP generator.

Sylvia.

Change the billing address on their utility bill.

 

[Michael A. Terrell]

Eeyore wrote:

So, explain what you want to do ! BTW, distance is related to receiver
sensitivity, NOT transmitter output.

The brain dead donkey is at it again.


--
You can't have a sense of humor, if you have no sense!

 

[GregS]

In article <g7qdnRUZ3Mvv5bjXnZ2dnUVZ_rxi4p2d@earthlink.com>, "Michael A. Terrell" <mike.terrell@earthlink.net> wrote:

Eeyore wrote:

So, explain what you want to do ! BTW, distance is related to receiver
sensitivity, NOT transmitter output.


The brain dead donkey is at it again.

Lets see

It could be neither if out of range.
Quadruple power = twice the distance
Twice the sensitivity = twice the distance
Twice the ERP = 50% increase in distance

Also related to frequency

Twice the height= I better stop here.



greg

 

[Bob Larter]

Sylvia Else wrote:

Bob Larter wrote:
Ajax wrote:
Cross-posted to sci.electronics.repair / misc, as I didn't know which
one would be most appropriate.

Anyone know of a RF noise generator / jammer, that could operate in VHF
frequencies? Preferably in UK / Europe. Ideally a radius of 20-30 metres
. Even a circuit for a home-build may do, although I am lazy

You know that that sort of thing is illegal just about everywhere, right?


But how many of us would look the other way if it were a device for
preventing mobile phone use on public transport?

Point.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------