I just found a fairly strong 'siren jammer' operating 9920 khz.
Have a listen, it's annoying to say the least!
I guess it's sole purpose is to cause interference to other services that transmit on/near that frequency.
Audio file attached.
Siren 'jammer' on 9920 khz
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Scannersplitterguy
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Siren 'jammer' on 9920 khz
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http://www.scannerantennasplitter.com
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AOR AR8200MK3, Icom IC-R75, UBC370CRS, UH7750NB, SR162 VHF AIS, SDR USB Dongle, Anytone AT-6666, Pearce Simpson Super Cheetah 27 MHz AM/SSB, QJE QJ-PS30II 30A PSU, Diamond DJ-130 Discone, Shockwave 5/8 27MHz, DIY HF longwire
http://www.acdcmanuals.com
AOR AR8200MK3, Icom IC-R75, UBC370CRS, UH7750NB, SR162 VHF AIS, SDR USB Dongle, Anytone AT-6666, Pearce Simpson Super Cheetah 27 MHz AM/SSB, QJE QJ-PS30II 30A PSU, Diamond DJ-130 Discone, Shockwave 5/8 27MHz, DIY HF longwire
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ozradio
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Re: Siren 'jammer' on 9920 khz
I don't see this being done in any official capacity. The only thing I can think that would be causing this would be someone deliberately trying to jam up a range of frequencies to cause interference.
ozradio
Simoco SRM9030Plus TU Band, SRM9030Plus AC Band, SRM9005 AC Band, SRM9022 TU Band
Tait T2000II, Barrett Crystal Locked HF Set, Uniden 80 Channel UHF
Simoco SRM9030Plus TU Band, SRM9030Plus AC Band, SRM9005 AC Band, SRM9022 TU Band
Tait T2000II, Barrett Crystal Locked HF Set, Uniden 80 Channel UHF
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Phantom
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Re: Siren 'jammer' on 9920 khz
Erm, this post was back 3 years ago....