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W4DPH > SAT 01.06.03 21:14l 31 Lines 1255 Bytes #999 (0) @ AMSAT
BID : ANS-152.06
Read: DB0FHN GUEST
Subj: VK6 - QRN
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<VE3FJB<WB0TAX<W4DPH
Sent: 030601/1911Z @:W4DPH.#TPA.FL.USA.NOAM #:59500 [CLW] FBB $:ANS-152.06
From: W4DPH@W4DPH.#TPA.FL.USA.NOAM
To : SAT@AMSAT
AMSAT News Service Bulletin 152.06 From AMSAT HQ
SILVER SPRING, MD. June 1, 2003
To All RADIO AMATEURS
BID: $ANS-152.06
You may not hear many VK6 hams on AO40 for a while. Many of us are
suffering from interference from some form of wide band data
transmission centred on 2.4GHz. The signal covers much of the Perth
metro area and is very strong. So strong in fact that it does not matter
where you beam you can still hear it - mainly from reflections I expect.
The signal, which runs continuously, sounds like a 100Hz buzzing sound
and has a bandwidth of about 4MHz. Looking at the signal on a spectrum
analyser it has a flat top and very steep sides. The signal started
about 6 weeks ago and one suggestion is that it might be an image
response of our S band down converters to the 2.1GHz G3 mobile phone
service that have just started tests.
I'm organising a DF party this weekend where many of the VK6 AO40
operators will try and take a bearing so we can attempt to locate the
source. I'll let you know what we find, in the mean time if anyone has
any idea what this signal may be please email me. (pharman@ddd.com, Ed.)
[ANS thanks Phil, VK6APH, for the above information.]
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