voltage control oscillator

[Fred Bloggs]

i m designing frequency jammer and i have to generate band 137MHZ to
177MHZ

And what useful purpose does this jammer serve?

 

[Jim Thompson]

And what useful purpose does this jammer serve?

Iranian "fast" boat ?

...Jim Thompson

 

[Rich Grise]

And what useful purpose does this jammer serve?

According to http://www.ntia.doc.gov/osmhome/allochrt.html ,

Land and maritime mobile communications, and the 2-meter ham band.

I wonder where he's at, when he's not surfing googlegroups. ;-)

Cheers!
Rich

 

[Rich Webb]

According to http://www.ntia.doc.gov/osmhome/allochrt.html ,

Land and maritime mobile communications, and the 2-meter ham band.

I wonder where he's at, when he's not surfing googlegroups. ;-)

Pakistan, apparently. The NNTP-Posting-Host: header line gets
you 203.99.178.174 which gets you

inetnum: 203.99.160.0 - 203.99.191.255
netname: PTCL
descr: Pakistan Telecommunication
descr: Company Limited
country: PK

 

[Fred Bloggs]

Pakistan, apparently. The NNTP-Posting-Host: header line gets
you 203.99.178.174 which gets you

inetnum: 203.99.160.0 - 203.99.191.255
netname: PTCL
descr: Pakistan Telecommunication
descr: Company Limited
country: PK

Okay, so far we have this Ali Baba who wants to set off a communications
jammer with a cheap Chinese LCD clock alarm...hmmmm, so the jammer and
clock are to be pre-placed at the location of the receiver to be
disabled at about the time something else is going on Ali doesn't want
the people at the receiver to know about.

 

[Spehro Pefhany]

Okay, so far we have this Ali Baba who wants to set off a communications
jammer with a cheap Chinese LCD clock alarm...hmmmm, so the jammer and
clock are to be pre-placed at the location of the receiver to be
disabled at about the time something else is going on Ali doesn't want
the people at the receiver to know about.

Maybe just an elaborate practical joke to be played on someone such as
a dispatcher?
http://www.n2nov.net/nypd_ems.html



Best regards,
Spehro Pefhany

 

[Fred Bloggs]

Maybe just an elaborate practical joke to be played on someone such as
a dispatcher?
http://www.n2nov.net/nypd_ems.html



Best regards,
Spehro Pefhany

Maybe or maybe not. The aspect of remote activation on a schedule fits a
railway scenario pretty well. The plan could be to defeat a CBTC (
communications based train control) system attempting to automatically
bring a train to a stop under any one of a multitude of hazardous and
emergency circumstances such as broken track or block occupied status.
This would fit a driverless system pretty well, maybe a subway system
somewhere.

 

[javvad]

Okay, so far we have this Ali Baba who wants to set off a communications
jammer with a cheap Chinese LCD clock alarm...hmmmm, so the jammer and
clock are to be pre-placed at the location of the receiver to be
disabled at about the time something else is going on Ali doesn't want
the people at the receiver to know about.- Hide quoted text -

- Show quoted text -

sir what u said i cant understand?

 

[Rich Webb]

sir what u said i cant understand?

The act of jamming radio communications is illegal everywhere except
in certain very narrowly defined circumstances. If you were covered by
those circumstances then you would, presumably, already have
legitimate access to the necessary technical data. If you don't then
it's a good bet that you aren't.