Luc,
Please keep me posted as to your results. Unfortunately our Field Day site is a city park in town, with plenty of WiFi around. As a plus we can borrow free internet during Field Day :-)
73, Joe kk0sd
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Luc Leblanc Sent: Wednesday, May 05, 2010 10:43 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: S Band interference was RE: Re: Field Day mode for AO-51
Just to add to my previous post S band on Field Day should normally get less QRM as most of the sites are outside cities and WI-FI interference is much more low in country location.
One experiment i will try on the next S band mode on AO-51 is to used a band pass cavity filter to see if adding some filtering this wide spread WI-FI and other 2.4Ghz device interference can be lowered to some extent hoping this will have an effect of the front end sensitivity of the downconverter. There is not much that we can do if the QRM is directly on the receiving 2401 frequencies but if it is possible to minimized any desensing effect "could be" it can help?
Joe,
My neighbors have several "wireless" devices that operate close enough to our frequencies to raise my noise level or produce a series of clicks and other noises. The worst offenders are a wireless network and a cordless phone. During the AO-40 era I bought a cordless phone from a neighbor that was very troublesome. I have since moved to a country location, and find it interesting that I can tell what direction town is
by
moving my antenna (pointed at the horizon) and listening to the noise
level
on mode S.
73, Joe kk0sd
Hi Joe
Your comment about Mode S interference interests me I have not been on since AO-40 In those days there was no interference on mode S. Unless it was another Ham. Would you kindly explain?
Thanks
Joe K0VTY
On Tue, 4 May 2010 22:22:54 -0500 "Gary "Joe" Mayfield"
and S band is becoming too full of interference.
"-"
Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE
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