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Re: The Mode B tradition



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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