[amsat-bb] Re: The Mode B tradition
John B. Stephensen
kd6ozh at comcast.net
Thu Sep 14 18:51:17 PDT 2006
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
>
>
>
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