[amsat-bb] Re: The Mode B tradition
John Champa
k8ocl at hotmail.com
Thu Sep 14 22:21:53 PDT 2006
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 at comcast.net>
>To: "i8cvs" <domenico.i8cvs at tin.it>, "george abbott" <ka1ajf at cox.net>,
> "'Bill Ress'" <bill at hsmicrowave.com>, "G0MRF David Bowman"
><g0mrf at aol.com>, <brobertson at mta.ca>, "AMSAT-BB"
><amsat-bb at 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 at tin.it>
>To: "John B. Stephensen" <kd6ozh at comcast.net>; "george abbott"
><ka1ajf at cox.net>; "'Bill Ress'" <bill at hsmicrowave.com>; "G0MRF David
>Bowman"
><g0mrf at aol.com>; <brobertson at mta.ca>; "AMSAT-BB" <amsat-bb at 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 at comcast.net>
> > To: "george abbott" <ka1ajf at cox.net>; "'Bill Ress'"
> > <bill at hsmicrowave.com>;
> > <G0MRF at aol.com>; <brobertson at mta.ca>; <amsat-bb at 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
> >
> >
> >
>
>_______________________________________________
>Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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