[amsat-bb] Re: The Mode B tradition
John B. Stephensen
kd6ozh at comcast.net
Fri Sep 15 02:02:17 PDT 2006
I only tried direction finding but it wasn't obvious which house was the
culprit. If AO-40 had lasted longer, I would have spent more time searchng.
73,
John
KD6OZH
----- Original Message -----
From: "John Champa" <k8ocl at hotmail.com>
To: <kd6ozh at comcast.net>; <domenico.i8cvs at tin.it>; <ka1ajf at cox.net>;
<bill at hsmicrowave.com>; <g0mrf at aol.com>; <brobertson at mta.ca>;
<amsat-bb at amsat.org>
Sent: Friday, September 15, 2006 05:21 UTC
Subject: RE: [amsat-bb] 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 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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