S Band interference was RE: Re: Field Day mode for AO-51
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
-----Original Message----- From: Joe v Murray [mailto:[email protected]] Sent: Tuesday, May 04, 2010 10:43 PM To: [email protected] Subject: Re: [amsat-bb] Re: Field Day mode for AO-51
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" [email protected] writes:
I have L band gear. When the bird is in L/U Luc and I have a great time talking to each other. When the bird is in V/U I'll make half a dozen or more contacts in a pass. I voted for mode L, because I didn't believe V/U was an option and S band is becoming too full of interference.
I have a couple questions:
- The folks who can't eek out a contact with the handheld and
Arrow during Field Day, have you practiced? It's how I have done it the last couple of years without that much trouble, patience and timing are the keys :-). We have a good Field Day location where I can see down to the horizon.
- Has the single contact per FM bird rule really helped anyone?
In the old days a couple big stations got on and essentially ran the bird. Is it fair? NO! but they handed out a lot of QSOs and we seemed to get more AMSAT Field Day entries as well.
The one bird one contact has been a noble experiment, maybe it is time to examine the results.
Hats off to the controllers for starting the discussion!
73, Just My Thoughts, Joe kk0sd
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Glasbrenner Sent: Monday, May 03, 2010 4:33 PM To: Ng, Peter Cc: [email protected]; [email protected] Subject: [amsat-bb] Re: Field Day mode for AO-51
Ng, Peter wrote:
...sorry, I meant to vote for V/U mode as I only have VHF/UHF
equipment!
Keep in mind there will likely be three or four transponders birds, and two to four other FM birds available that weekend!
It's been my perception that a good portion of AMSAT's sustaining members leave and breathe the highest tech they can manage. Eight out of eight satellites being V/U seems counter to that goal.
Mark and Bob both make good points supporting at least one area of refuge for this portion of the AMSAT population. Personally, I think the V/U FM experience on Field Day is a big turnoff to newbies, especially since so many under-prepared, over-powered and out of practice once-a-year sat ops fail miserably to get those bonus points on FM.
I bet someone in your area has 1.2 Ghz capability!
73, Drew KO4MA _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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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
normally get less QRM as most of the sites are outside cities and WI-FI interference is much more low in country location.
OFF TOPIC RANT:
I always thought that Field Day was a day to get out and show our stuff. Hiding it in the wilderness far from any passing humans is one way to make sure we die in annonymity. Our big and very active club has FD on our own club site, which is a fantastic place... Yet the only people that see it are us and a few friends or special invitees.
Now, of course, I would not at all want to detract from all the fun of field day at the clubs local site, but on the other hand, a few of us make a big effort to hold a FD presence right in the middle of the town square, or Mall, or where ever we can be the most visible as possible. We strive for 10,000 people to see us and a score of maybe 10 instead of 10,000 FD points with a reach-out to only 10.
Just a thought. And I am not suggesting it should apply to all FD sites. FD is too much fun to be put in other people's boxes, but just something to consider in the big scheme of things.
RANT OFF.
Bob, Wb4APR
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: [email protected] [mailto:[email protected]] On Behalf Of Luc Leblanc Sent: Wednesday, May 05, 2010 10:43 AM To: [email protected] 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
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
What I did some time ago was I told some neighbors that can hear the signal from their device, and that other hams can do the same. I did not tell them it was just clicks and noise. A short time later things got quieter.
73 Bob W7LRD
Original Message ----- From: "Gary "Joe" Mayfield" [email protected] To: [email protected] Sent: Wednesday, May 5, 2010 4:19:35 AM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] S Band interference was RE: Re: Field Day mode for AO-51
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
-----Original Message----- From: Joe v Murray [mailto:[email protected]] Sent: Tuesday, May 04, 2010 10:43 PM To: [email protected] Subject: Re: [amsat-bb] Re: Field Day mode for AO-51
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" [email protected] writes:
I have L band gear. When the bird is in L/U Luc and I have a great time talking to each other. When the bird is in V/U I'll make half a dozen or more contacts in a pass. I voted for mode L, because I didn't believe V/U was an option and S band is becoming too full of interference. I have a couple questions:
- The folks who can't eek out a contact with the handheld and
Arrow during Field Day, have you practiced? It's how I have done it the last couple of years without that much trouble, patience and timing are the keys :-). We have a good Field Day location where I can see down to the horizon.
- Has the single contact per FM bird rule really helped anyone?
In the old days a couple big stations got on and essentially ran the bird. Is it fair? NO! but they handed out a lot of QSOs and we seemed to get more AMSAT Field Day entries as well.
The one bird one contact has been a noble experiment, maybe it is time to examine the results.
Hats off to the controllers for starting the discussion!
73, Just My Thoughts, Joe kk0sd
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Glasbrenner Sent: Monday, May 03, 2010 4:33 PM To: Ng, Peter Cc: [email protected]; [email protected] Subject: [amsat-bb] Re: Field Day mode for AO-51
Ng, Peter wrote:
...sorry, I meant to vote for V/U mode as I only have VHF/UHF
equipment!
Keep in mind there will likely be three or four transponders birds, and two to four other FM birds available that weekend!
It's been my perception that a good portion of AMSAT's sustaining members leave and breathe the highest tech they can manage. Eight out of eight satellites being V/U seems counter to that goal.
Mark and Bob both make good points supporting at least one area of refuge for this portion of the AMSAT population. Personally, I think the V/U FM experience on Field Day is a big turnoff to newbies, especially since so many under-prepared, over-powered and out of practice once-a-year sat ops fail miserably to get those bonus points on FM.
I bet someone in your area has 1.2 Ghz capability!
73, Drew KO4MA _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
I'm in the Chicago suburbs, and can see at least a dozen wi-fi access points in my neighborhood with NetStumbler, yet I have worked AO-51 in mode V/S with a K5GNA downconverter with corner reflector, hand-held inside the house. With the barbecue grill antenna, I can use an in-line 6 dB attenuator AND the receiver's attenuator, and still have armchair copy.....
George, KA3HSW
----- Original Message ----- From: "Gary "Joe" Mayfield" [email protected] To: [email protected] Sent: Wednesday, May 05, 2010 6:19 AM Subject: [amsat-bb] S Band interference was RE: Re: Field Day mode for AO-51
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
-----Original Message----- From: Joe v Murray [mailto:[email protected]] Sent: Tuesday, May 04, 2010 10:43 PM To: [email protected] Subject: Re: [amsat-bb] Re: Field Day mode for AO-51
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
participants (5)
-
Bob- W7LRD -
Gary "Joe" Mayfield -
George Henry -
Luc Leblanc -
Robert Bruninga