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Re: The Mode B tradition



John,

The WiFi QRM you experienced on Mode S was probably a WiFi Channel 1 device.
Some APs use that for a default channel, although most use Channel 6.

Did you try using NetStumbler (free software) to determine location?  At 100 
mW
nominal maximum RF power it must be a very local source.  Many times you can 
just
ask them to move to one of the channels 7 - 11 (simple software toggle), 
which in
the US, is outside the 2.4 GHz Amateur Band.

Just a suggestion.  It's kind of like solving a TVI problem, but in reverse 
(HI).

73,
John - K8OCL



>From: "John B. Stephensen" <kd6ozh@comcast.net>
>To: "i8cvs" <domenico.i8cvs@tin.it>, "george abbott" <ka1ajf@cox.net>,      
>   "'Bill Ress'" <bill@hsmicrowave.com>,        "G0MRF David Bowman" 
><g0mrf@aol.com>, <brobertson@mta.ca>,        "AMSAT-BB" 
><amsat-bb@amsat.org>
>Subject: [amsat-bb] Re: The Mode B tradition
>Date: Fri, 15 Sep 2006 01:51:17 -0000
>
>The European contacts are similar to my experience in the U.S. Are you
>certain that the contacts outside Europe weren't cross-band -- one end UV
>and the other US or LS? These would also have been completed on UV.
>
>My biggest concern about the S downlink is that it is becoming increasingly
>harder to use in many parts of the world so that it becomes less and less
>useful over the life of the Eagle satellites (2010-2030). When AO-13 was in
>orbit I could use the S downlink all the time, but by the time AO-40 was in
>orbit, I had S9 WiFi interference for hours at a time -- even with 3-foot
>dish and feed. The dish was fairly deep (0.33 f/d) and the feed shielded so
>sidelobes were low.
>
>Some in the U.K. say that we'd be better off flyng an S2 downlink
>(3400-3410MHz).
>
>73,
>
>John
>KD6OZH
>
>----- Original Message -----
>From: "i8cvs" <domenico.i8cvs@tin.it>
>To: "John B. Stephensen" <kd6ozh@comcast.net>; "george abbott"
><ka1ajf@cox.net>; "'Bill Ress'" <bill@hsmicrowave.com>; "G0MRF David 
>Bowman"
><g0mrf@aol.com>; <brobertson@mta.ca>; "AMSAT-BB" <amsat-bb@amsat.org>
>Sent: Friday, September 15, 2006 01:13 UTC
>Subject: Re: [amsat-bb] Re: The Mode B tradition
>
>
> > ----- Original Message -----
> > From: "John B. Stephensen" <kd6ozh@comcast.net>
> > To: "george abbott" <ka1ajf@cox.net>; "'Bill Ress'"
> > <bill@hsmicrowave.com>;
> > <G0MRF@aol.com>; <brobertson@mta.ca>; <amsat-bb@amsat.org>
> > Sent: Friday, September 15, 2006 1:19 AM
> > Subject: [amsat-bb] Re: The Mode B tradition
> >
> >> You're right. P3E and Eagle will operate similarly to AO-10 and AO-13 
>on
> >> mode B and P3E is similar to AO-13 on mode S. I don't remember making a
> >> single S-band contact outside the U.S. on AO-13.
> >
> > clipped
> >
> >> 73,
> >>
> >> John
> >> KD6OZH
> >
> >
> > Hi John, KD6OZH
> >
> > Just for record i have included belowe a list of  OSCAR-13
> > operators with their call letters and antennas used for downlink
> > Mode-S from 2400.711 to 2400.747 MHz during the lifetime
> > of this glourious  U/S transponder
> >
> > The power of OSCAR-13  mode-S was only 1,5 W pep and the
> > satellite antenna was an helix with G=10 dBi and so EIRP=15 W
> > pep
> >
> > In comparison the power of the S1 TX  on AO40 was 50 W
> > pep and the antenna was an helix with G=10 dBi and so
> > EIRP=500 W pep
> > The power of the next P3E will be 38 watt pep with a similar
> > antenna.
> >
> > The mode-S transponder of OSCAR-13 was "hard limited",in
> > other words no AGC was in it and so the 1,5 W pep
> > available for all users was proportional to the uplink power.
> >
> > At epoch time of this list,uptodate by W4FJ on 14 jan 1994
> > it was very difficult if not impossible to find ready to operate
> > preamplifiers/converters antennas/antenna feeds for 2.4 GHz
> > and the most part of  the equipments  where necessarily hombrew
> > by amateurs.
> >
> > In addition,at that time about 12 years ago,the best GaAsFET
> > available at amateur price showed a noise figure not less than
> > 1 dB at 2400 MHz
> >
> > Even though the list of users is very long.
> >
> > Please read it
> >
> > 73 de i8CVS Domenico
> >
> > ----------------------------------------------------------------
> > AMSAT OSCAR 13 mode "S" STATION LIST
> > Originated by W4FJ last uptodate 14 Jan,' 94
> > ----------------------------------------------------------------
> > Sources: K0RZ, DB2OS, JR8XPV, JA6AUX,
> >              ON6UG, W6ABN, W4FJ
> > ----------------------------------------------------------------
> >  CALL        NAME     DOWNLINK ANTENNA
> >                                        2400.7 MHz
> > ----------------------------------------------------------------
> > DA1AF         Bob          4 x 45 loop  yagi
> > DL1BEM       Andy        1,2 m dish
> > DL1FCU        Hardy       1,0 m dish
> > DJ1KM          Rene               ?
> > DK1KQ         Uwe          67 loop  yagi
> > DD1US         Mat           19 loop yagi
> > DF2BX         Theo          3,0 m dish
> > DK2UT         Archim       0,6 m dish
> > DK3AX         Gerd          4 x 16 el yagi
> > DG4IAF       Archim       1,6 m dish
> > DF4TA         Armin                ?
> > DL4YCC      Klaus         1,5 m dish
> > DF5DP        Bert            2 x 39 el yagi
> > DL5EH        Wilhelm               ?
> > DJ7FJ          Joseph       1,2 m dish
> > DC7KY        Klaus         2,0 m dish
> > DL8NL         Hardy          2,7 m dish
> > DC8UG        Harold         1,5 m dish
> > DL9GU         Ed              1,5 m dish
> > DL9GZ         Egon           4 x 39 ele yagi
> > DC9HR        Hatman       1,2 m dish
> > DJ9PC         Peter          1,5 m dish
> >
> > EA4LE        Toni           0,6 m dish helix fed
> >
> > F6CBC        Jean            1,0 m dish
> > F8HLG        Georges      18 turn helix
> > FM5AB       Jean             1,2 m dish
> >
> > G1IRG         Simon          1,5 m dish
> > G2BFO        David           1,2 m dish
> > G3CDK        Rod             1,2 m dish
> > G3RUH        James          66 cm dish helix fed
> > G4EEO        Phil             1,5 m dish
> > GW3XYW    Stuart           6,0 m dish
> >
> > HB9AQZ      Hans            26 turn helix
> > HB9MGI       Ernst           1,5 m dish helix fed
> >
> > i1CDB          Peter            67 loop  yagi
> > i2BEM          Elio             1,2 m dish
> > i3EEL           Lodovico      1,2 m dish
> > iN3HER        Raimund      1,5 m dish
> > iK3VZS         Vinicio         1,0 m dish
> > iN3WZF        Joseph         1,5 m dish
> > iW5ABE       Alex             4 x 18 turn Helix
> > i5MPK          Peter            4,0 m dish
> > i6CGE          Alfio              1,2 m dish
> > i6DRZ           Mario            1,0 m dish helix fed
> > i6PNN          Amato           1,2 m dish
> > i7LIT             Rino              1,2 m dish
> > i7UGO          Ugo               1,0 m dish
> > i8CVS          Domenico       1,2 m dish helix fed
> >
> > JA1ANG       Harry              16 turn helix
> > JA1ANP        Aky               12 turn helix
> > JA1AOY        Masaji           2.0 m dis
> > JR1BDG        Oishi             1.5 m dish helix fed
> > JA1BLC         Fumie            17 loop yag
> > JL1CHX         Toshido          3.0 m dish
> > JA1GYT        Tad                 2 x 37 loop yagi
> > JK1HIX          Tom               2.0 m dish
> > JH1LVN         Masa             2 x 45 loop yagi
> > JH1PEF         Mak              2.4 m dish
> > JA1QQN        Kazu             36 loop yagi
> > JA1SYK         Hiro              1.2 m dish
> > JA1UHY         Hisa              3.0 m dish
> > JR1WZI          Ken               1.5 m dish
> > JA2ORW       Jin                  24 turn helix
> > 7N2RWX        Tada              29 turn helix
> > JH3EAD         Takao                  ?
> > JA3THL          Taka              56 loop yagi
> > JA3GCI             ?                 2 x 23 turn helix
> > JA4AEP         Ken                1.5 m dish
> > JA4BLC          Row               6.0 m dish
> > JR4BRS         Toshi              4.0 m dish
> > JA4CMZ         Iwata              3.0 m dish
> > JA4GVA         Shin               0.7 m dish
> > JA4HZN          Mata              2.0 m dish
> > JA5LG            Kiyo               2 x 50 loop yagi
> > JA6AUX          Masa              36 loop yagi
> > JR6BLW         Mori               4 x 55 loop yagi
> > JA6CZH          Yamada         1.2 m dish
> > JE6DBI           Yuu               1.6 m dish
> > JA6ELW         Sou               4 x 55 loop yagi
> > JA6FTL             ?                 1.0 m dish
> > JA7EC            Shoji              2.0 m dish
> > JH7JKW          Nikio             4.0 m dish
> > JA8ERE          Terui              3.0 m dish
> > JA8KCM          Hiro               1.2 m dish
> > JA8PL             Masa             3.6 m dish
> > JA8UJR           Masa             2 x 37 loop yagi
> > JR8XPV           Tango            2 x 40 loop yagi
> >
> > OE3JIS            Josef             45 loop yagi
> > OE5BKL            Al                  ? loop yagi
> > OE9DGV         Guntran          68 loop yagi
> > ON4DY            Bob               1.0 m dish
> > ON6UG            Freddy           2.0 m dish
> >
> > OZ8QI              Freddy                 ?
> >
> > PE1MGS         Juan                     ?
> > PT9FH             Tony              2.0 m dish helix fed
> >
> > SM7BCL          Lars              2 x 45 loop yagi
> > SM0SFV          Stig               1.2 m dish
> >
> > SV3KH             Nik                2.0 m dish
> > SV5QR            Panos            1.0 m dish helix fed
> >
> > VE1CKE          Norm              1.2 m dish helix fed
> > VE2LI              George           1.2 m dish  helix fed
> > VE3GTF          George            2 x 45 loop yagi
> > VE3NPC          Clare              1.2 m dish helix fed
> > VE3VC            Ken                1.0 m dish
> > VE7BGG          Cor                6.0 m dish
> > VE7CLD           Gunter           4.8 m dish
> > VE7VHF           Bill                2.4 m dish helix fed
> > VE7VL             Val                0.8 m dish helix fed
> > VK4KZR           Rod                         ?
> > VK4ZQ             Roy               2.8 m dish
> > VK6BMD          Bruce            1.0 m dish
> > VK6ZAY           Al                            ?
> > VK6ZWF          Allen                        ?
> >
> > N1AXB             Larry              4 x 45 loop yagi
> > W1NU             Vic                2 x 45 loop yagi
> > W1PEA           Judd               2 x 45 loop yagi
> > W1QJR            Ken               0.6 m dish helix fed
> > WA1QXR         Ken               1.0 m dish helix fed
> > W1YN             Ed                 0.6 m dish helix fed
> > W1SNN           Stirling           4 x 16 turn helices
> > N1IQU             Mack             8.0 m dish helix fed
> > K2IYQ             Steve             0.6 m dish helix fed
> > N2MB             Barry              2.4 m dish helix fed
> > NQ2O             Walt               2 x 45 loop yagi
> > W2UHI            Frank             1.0 m dish
> > N3CEV           Mike                ?     dish
> > N3FLY             Paul               45 loop yagi
> > KA3HPQ          Phil                        ?
> > KK3K              Jim                 1.2 m dish helix fed
> > W3PM             Gene              1.2 m dish helix fed
> > W3PRB           Jonny             1.2 m dish
> > W3QBK           Stan               1.2 m dish helix fed
> > W3TMZ            Jack               0.6 m dish helix fed
> > K3VDB            Charlie            0.6 m dish helix fed
> > KJ4BF             Grady             Conifer dish
> > KC4CQR          Jerry               3.0 m dish
> > N4DTB             Lee                 4 x 45 loop yagi
> > W4FJ               Ted                1.5 m dish helix fed
> > W4KSB           Larry               2 x 45 loop yagi
> > AB4NJ             Dale                3.0 m dish
> > N4NR               Dennis                     ?
> > N4LC                Ken                4 x 45 loop yagi
> > WD4O              Bernice           4 x 45 loop yagi
> > W4ODW           Gene              3.0 m dish helix fed
> > K4RZB              Jim                4 x 45 loop yagi
> > WA4VHF          Chip               1.2 m dish helix fed
> > N5BF               Courtney          45 loop yagi
> > W5GEL            Bob                 1.2 m dish helix fed
> > WB5GQM         Fred               0.6 m dish helix fed
> > W5IU                Keith              1.0 m dish helix fed
> > K5RHR             Dick                0.6 m dish helix fed
> > WA5RTL           "BW"                         ?
> > W6ABN            Stan               1.2 m dish helix fed
> > W6CCY            John               0.6 m dish helix fed
> > AB6DT              Bob                        ? loop yagi
> > WB6GYD          Eric               1.5 m dish
> > NK6K                Harold            4 x 45 loop yagi
> > W6KAG            Butch             3.0 m dish helix fed
> > WB6LLO           Dave              1.0 m dish helix fed
> > N6OVP             Dave                           ?
> > W6YVO            Dick                           ?
> > AA7A                Ed                 0.6 m dish helix fed
> > WA7ABP          Lynn              1.2 m dish helix fed
> > KB7CNN            Bill                2 x 45 loop yagi
> > W7IUV              Larry              3.0 m dish helix fed
> > KE7NR              Don               2 x 45 loop yagi
> > N7RYW             Bill                2.0 m dish
> > K7ZTM              Pete              2 x 45 loop yagi
> > N8AJD              Steve             45 loop yagi
> > K8TL                 Tom               1.2 m dish helix fed
> > WA8WBP          Ralph            1.2 m dish helix fed
> > K8YAH              Ron               2 x 45 loop yagi
> > WJ9F                Russ              2 x 45 loop yagi
> > W9FMW            John              2 x 45 loop yagi
> > KA9LNV             Ed                0.6 m dish helix fed
> > WA9MTO           Jack              2 x 45 loop yagi
> > AB9V                 Mike              45 loop yagi
> > W0DQY             Smitty            4 x 45 loop yagi
> > WD0E                Jim                0.6 m dish helix fed
> > W0HHE              Al                  2.0 m dish
> > K0KE                 Eric                2.0 m dish
> > N0LEF                Stu                2 x 45 loop yagi
> > KA0OOQ            Jerry              4 x 45 loop yagi
> > K0RR                 Lew                2 x 45 loop yagi
> > K0RZ                  Bill                1.2 m dish helix fed
> > K0VTY                Joe               1.2 m dish helix fed
> > N0WX                 Charlie           2 x 45 loop yagi
> >
> > ZL2ALP               Paul              45 loop yagi
> >
> > ZS6JT                 Peter              0.6 m dish helix fed
> >
> > NOTE:
> > This list of OSCAR-13 Mode-S operators was
> > uptodated by Ted W4FJ on 14 january 1994
> >
> >
> > 73"  de
> >
> > i8CVS Domenico
> >
> >
> >
>
>_______________________________________________
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_______________________________________________
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