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CX2SA > SATDIG 15.05.08 23:56l 438 Lines 17330 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: "Birdies" from Linksys Wireless router (Jeff Yanko)
2. Re: Organised Chaos. (Ben Jackson)
3. Re: Organised Chaos. (Steve Attfield)
4. SEEDS packet (Robert Turlington)
5. Re: Dayton (Michael Pfeuffer)
6. Re: Organised Chaos. (John Mock KD6PAG)
7. Re: SEEDS packet (Raul Romero CA3SOC)
----------------------------------------------------------------------
Message: 1
Date: Wed, 14 May 2008 22:30:39 -0700
From: "Jeff Yanko" <wb3jfs(AT)cox.net>
Subject: [amsat-bb] Re: "Birdies" from Linksys Wireless router
To: "Nate Duehr" <nate(AT)natetech.com>, "Amsat-Bb" <amsat-bb(AT)amsat.org>
Message-ID: <000901c8b64c$cf7992c0$6501a8c0(AT)QUECREEK>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I found this topic interesting since I too have a Linksys WRT54G router,
which is also in the shack. I decided to listen for the "birdies". I tuned
to 145.93 mHz on the HT while sitting in the chair and.....nothing. Hmmm.
So I stood up and moved around then lo and behold a strong birdie as I got
very near the router. I did notice one thing, the birdie completely
disappears about 2 to 2.5 feet from the unit. My router is on one side of
the room about 12 to 13 feet away from the desk. I have absolutely no copy
of the birdie with the HT on the desk. A possible solution could be if you
have a large enough room, move the router off of and away from the desk with
the VHF equipment on.
73,
Jeff WB3JFS
----- Original Message -----
From: "Nate Duehr" <nate(AT)natetech.com>
To: "Amsat-Bb" <amsat-bb(AT)amsat.org>
Sent: Thursday, May 08, 2008 11:58 PM
Subject: [amsat-bb] Re: "Birdies" from Linksys Wireless router
>
> On May 6, 2008, at 4:58 PM, Mark L. Hammond wrote:
>
>> Hello all,
>>
>> The launch of Delfi-C3 has brought to my attention a very strong
>> birdie at 145.930 MHz that clearly comes from the Linksys WRT54G
>> Wireless router that sits in the shack. Forcing the wireless signal
>> to another frequency/channel has no impact whatsoever...
>>
>> Anybody on the list have a clever solution (other than 'get a
>> different router' or 'move it' or 'shut it off', etc...hi hi) that
>> they may have used for a similar problem?
>>
>> Thanks,
>>
>> Mark L. Hammond [N8MH]
>
>
> Mark,
>
> My Linksys WRT54GS annoyed the heck out of me with birdies, so I
> replaced it with a cheap Netgear. Not a peep out of it, since then.
>
> I liked having DD-WRT on the Linksys device a couple of years ago when
> I was using it, but the Linksys is stashed away in a box for
> "emergencies" and otherwise banned from my shack now, due to the RF
> issues.
>
> Ironically I had already tried the "power the house down to see if the
> interference is local" and had decided it wasn't, and that I needed to
> do some DF'ing... then I realized that the server and the WRT54GS were
> on the UPS, which I had NOT shut off. (Doh! Smacks forehead...)
>
> I did try briefly to do things like ferrites on the "goes-intas" and
> "goes-outtas", etc... to no perfect effect. I could mitigate some of
> the noise, but the thing was ultimately just too noisy. The wall-
> wort for my particular model (there are something like six different
> hardware models of the WRT54GS -- another annoying pattern of the
> small router manufacturers) was just a transformer... whether or not
> there was a noisy switch-mode power supply inside the Linksys, I
> didn't investigate.
>
> Someone else commented about using "quality Cat 5 and Cat 6 cable"...
> since Cat 5 and Cat 6 are ratings for UNSHIELDED twisted-pair (UTP), I
> have no idea what differing "quality" levels of cable would
> accomplish. Ethernet via Cat 5 is SUPPOSED to leak signal. Someone
> missed reading the standards, I guess. The comment made no sense to
> me from an RF engineering perspective.
>
> One possible "fix" for that type of noise could be to run Ethernet on
> SHIELDED twisted-pair (STP) cable, and ground the "drain" wire at ONE
> end (don't ground both ends, you WILL create a ground loop, and it
> WILL drive you crazy... eventually) but it no longer will meet the
> Ethernet specifications for cross-talk, etc. Frankly, it works --
> but don't go doing it in the office or someplace where the network is
> critical. They make special RJ45 connectors with metal strips
> "wrapped around" the connector body that can be crimped in such a way
> as to capture the drain wire, and that are built to ground to special
> female RJ45 sockets... again, only do this on one end... and they were
> usually used for things like telco T1 carriers that *are* specified to
> use STP cabling in many instances.
>
> I don't think the real noisemaker in the Linksys was the Ethernet
> signal itself anyway -- it certainly leaked out of the cheap plastic
> (virtually unshielded) case via the Ethernet cablilng, but the
> Ethernet noise wasn't the problem. It was so cheap to try another
> router, the "fixes" weren't worth my time. Easier to buy from Netgear
> who's had a pretty good track record of actually building properly
> shielded products, back to when their little switches, hubs, and other
> devices were all in the "blue metal case", complete with a real ground
> terminal and lug on the back-side, which is a "body style" they're not
> making many of anymore...
>
> Same thing with cheap plastic PC cases... noise galore leaking from
> those, too. Makes one miss the days of steel cases and PCs you could
> barely lift.
>
> My IBM/Lenovo T43 provided by work throws all sorts of VHF crud,
> enough to completely obliterate the front-end of my poor Kenwood TH-
> F6A "broad as a barn door" receiver on most of the VHF band (IF mixing
> perhaps), and the MacBook is more bearable, but the LCD backlight
> system makes RF noise.
>
> I guess with the ever-lowing price of fiber-optic based networking
> gear... that's the ultimate in quiet, as long as you can keep the
> routers/switches themselves from leaking crud... but that's definitely
> overkill. Overkill is sometimes what we hams do best, however. I
> have seen the photos to prove it. (GRIN) We are the only HOBBY
> organization that regularly launches satellites... or so I'd like to
> believe. (BIGGER GRIN)
>
> Good luck killing off the Linksys RF interference gremlins. Netgear
> highly recommended!
>
> --
> Nate Duehr, WY0X
> nate(AT)natetech.com
>
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
>
------------------------------
Message: 2
Date: Thu, 15 May 2008 06:16:05 -0400
From: Ben Jackson <bbj(AT)innismir.net>
Subject: [amsat-bb] Re: Organised Chaos.
To: Edward Cole <kl7uw(AT)acsalaska.net>
Cc: la2qaa(AT)amsat.org, amsat-bb(AT)amsat.org
Message-ID: <482C0D65.4050303(AT)innismir.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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Edward Cole wrote:
| It is obvious that there is a whole generation of Leo-FM sat users
| that are clueless of what ham radio on a Heo linear-tranponder is
| like. Although it must be harder than a cell phone since so many
| cannot seem to figure out how to operate on the Leos...I would say it
| is not "much" harder than using the local repeater.
Remember folks, if it isn't hard, we obviously shouldn't be encouraging it.
| I offer an analogy: Compare all the ham radio contacts that are done
| on HF with the same number of folks trying to talk thru a single FM
| repeater! First it cannot be done; second the attempt results in
| total chaos with "big fish" eating the little fishes!
First, it can be done and it is done. Yes, on FM sats (and if everyone
on HF was on a sindle channel) you can rarely have extended QSOs beyond
call sign and grid square, but it can work, and it does work. AO-51's
popularity proves that.
Also, if only "big fishes" work AO-51, there wouldn't be QRP or portable
stations there. That is certainly not the case. I've done QSOs on AO-51
(AT) 5W into a mag-mount on my car. It worked fine.
- --
Ben Jackson - N1WBV - New Bedford, MA
bbj <at> innismir.net - http://www.innismir.net/
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------------------------------
Message: 3
Date: Thu, 15 May 2008 08:17:05 -0400
From: Steve Attfield <steven_a(AT)rogers.com>
Subject: [amsat-bb] Re: Organised Chaos.
To: amsat-bb(AT)amsat.org
Message-ID: <482C29C1.3040408(AT)rogers.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Since everyone else is I might as well throw my 2 cents worth in here. I
would guess that the OP is a fairly well established person and is able
to afford all the fancy equipment that goes into making a top notch
station for the linear birds. Good for him! I have no problem with
people who can as long as you consider that the best some of us can
afford is a simple FM transceiver and a few homebrew antennas to access
the birds. So the way I see it either we need more fm birds to reduce
the load or we need a way for more of us to be able to use the ssb sats
-Steve VA3SAX
------------------------------
Message: 4
Date: Thu, 15 May 2008 14:06:17 +0100
From: Robert Turlington <rob_g8ate(AT)hotmail.com>
Subject: [amsat-bb] SEEDS packet
To: Amsat Buleitin Board <amsat-bb(AT)amsat.org>
Message-ID: <BAY112-W1913CA868FC096F3051812C0C90(AT)phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
Hi All
today at about 1220utc SEEDS was sending a packet sounding audio,I tried to
decode using MixW but the audio tones didn't quite match anything ,they were
about 1100hz/2300hz.Next time I hear them I will try and get an accurate
value.
The question:-is there any sound card software out there that can decode,its
posible that I can use a similar method to UO11 decode using MixW ,I will have
to see.Regards Robert G8ATE
_________________________________________________________________
Discover and Win with Live Search
http://clk.atdmt.com/UKM/go/msnnkmgl0010000007ukm/direct/01/
------------------------------
Message: 5
Date: Thu, 15 May 2008 11:24:17 -0500
From: Michael Pfeuffer <wq5c(AT)texas.net>
Subject: [amsat-bb] Re: Dayton
To: Sebastian <w4as(AT)bellsouth.net>, AMSAT-BB(AT)amsat.org
Message-ID: <6.1.2.0.2.20080515111738.059f1ec0(AT)pop.texas.net>
Content-Type: text/plain; charset=us-ascii; format=flowed;
x-avg-checked=avg-ok-74EE53EB
There were some rumors in March about Icom replacing the IC-910 with an
"IC-911" &/or "IC-911/D". From what I can gather, components for the
IC-910 were not RoHS compliant, and that's the main reason for
change. Bear in mind these are Japanese rumors, translated through
bablefish, & interpreted by me. :)
Looking forward to see what's announced at Dayton.
--Mike WQ5C
At 07:45 AM 5/14/2008, Sebastian wrote:
>Is there any possibility that one of the major manufacturers will
>introduce a new satellite rig in Dayton? Or that the mail order
>houses will have special prices for those who can't attend Dayton? Is
>that a common practice?
>
>I'd like to thank everyone on here who replied when I mentioned that I
>was starting back up on satellites. Your suggestions have pretty much
>convinced me that I should go with the Kenwood TS-2000. So if anyone
>strongly thinks that I shouldn't, please express your thoughts on this.
>
>73 de W4AS
--
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.524 / Virus Database: 269.23.16/1433 - Release Date: 5/14/2008
4:44 PM
------------------------------
Message: 6
Date: Thu, 15 May 2008 09:40:15 -0700
From: John Mock KD6PAG <kd6pag(AT)amsat.org>
Subject: [amsat-bb] Re: Organised Chaos.
To: amsat-bb(AT)amsat.org
Message-ID: <E1JwgV5-0006UE-A0(AT)sebastopol.fdns.net>
John Hackett LA2QAA wrote:
> I also sincerely hope that the standard of operating (read: disipline/
> proceedure) is better in North America than it is in Europe - actually, I've
> listened via N1DID and Echolink, as well as the promo video so I know it is.
I can assure you it definitely is. If you have read my 'road trip'
posts, then you would know that i do have alot of experience in mode
J-FM. We have occasional problem with people calling CQ who can't
hear the satellite and there is some unnecessary QRM from people who
can't hear their own downlink (e.g. are not operating full-duplex).
But it is quite workable much of the time, especially on weekdays.
My biggest frustration out here is when alot of the satellite time
is taken up with the 'regulars' saying hello to the same people,
week after week.
Weekends, particularly on AO-51 and often on AO-27, can get pretty
chaotic. My experience on my trip from California to Colorado/New
Mexico was that it seemed to get somewhat worse as i went east. So
i would say it has to do with the population density in the footprint
of the satellite. Yet on the quieter passes on that trip, several
times i sent a quick message home third-party via satellite where i
would be camping for the night when there was no cell phone coverage
or pay phones available. Amateur radio works when nothing else will.
Before i say alot more on why i think there might be such a difference
between operating in the United States and in western Europe, i need
to transcribe my satellite passes when i visited Paris last year. I've
procrastinated doing this simply because i don't think i had more than
one or two QSOs worthy of a QSL card out of 7 passes attempted while i
was over there this time. I did do better in 2005 with two successful
QSOs in 4 passes from southern France.
In North America, Mode J-FM is quite workable if what you are looking for
is a QSL card. It is also good for amateur satellite demonstrations, as
almost always, there will be someone to talk to. Please use a linear
transponder if you want to have an extended QSO when a satellite covers
well-populated areas. While Mode J-FM can be very frustrating at times,
if you're looking for VUCC or Worked All States on satellite, clearly it
is the best way to go in North America.
-- KD6PAG
P.S. Except on SO-50 when i'm on the road, all contacts referenced above
were made at 1W or less. So power is not necessarily a factor.
P.P.S. Addendum to my Portland trip report, W6ASL received 17 grid squares
out of 19 activated. Good work, Jim.
------------------------------
Message: 7
Date: Thu, 15 May 2008 13:24:35 -0400
From: "Raul Romero CA3SOC" <ce3soc(AT)gmail.com>
Subject: [amsat-bb] Re: SEEDS packet
To: "Robert Turlington" <rob_g8ate(AT)hotmail.com>, "Amsat Buleitin
Board" <amsat-bb(AT)amsat.org>
Message-ID: <74DDEA6DC06440BC9B67632B9EC0D7B0(AT)p42800>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
you have select mode 1200 psk Satellite
or AFSK Custom tone select 1200 Baud and tone copy from seed 1100 hz and
2300 Hz
iam decoded in mixw32 from afsk custom modem and my mp3 file
from my pc server http://ce3soc.no-ip.org
Test and Enjoy
Raul
CA3SOC
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----- Original Message -----
From: "Robert Turlington" <rob_g8ate(AT)hotmail.com>
To: "Amsat Buleitin Board" <amsat-bb(AT)amsat.org>
Sent: Thursday, May 15, 2008 9:06 AM
Subject: [amsat-bb] SEEDS packet
>
> Hi All
> today at about 1220utc SEEDS was sending a packet sounding audio,I tried
> to decode using MixW but the audio tones didn't quite match anything ,they
> were about 1100hz/2300hz.Next time I hear them I will try and get an
> accurate value.
> The question:-is there any sound card software out there that can
> decode,its posible that I can use a similar method to UO11 decode using
> MixW ,I will have to see.Regards Robert G8ATE
> _________________________________________________________________
>
> Discover and Win with Live Search
>
> http://clk.atdmt.com/UKM/go/msnnkmgl0010000007ukm/direct/01/
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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 amsat-bb(AT)amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 3, Issue 246
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