AMSAT-UK

///////////////////////////////////////////
Special Event Station for 40th Anniversary of OSCAR 7 Launch

Posted: 31 Oct 2014 01:52 PM PDT
http://amsat-uk.org/2014/10/31/speci...scar-7-launch/

OSCAR 7 in Space

Patrick Stoddard WD9EWK/VA7EWK has secured the special call sign W7O
(Whiskey Seven Oscar) for use in commemorating the 40th anniversary of the
launch of OSCAR 7 on November 15, 1974.
OSCAR 7 in anechoic chamber with Perry Klein K3JTE and Jan King
K8VTR/W3GEY Credit Dick Daniels W4PUJ

On the AMSAT Bulletin Board he writes:

I plan on having this call on the air between November 15-24 2014, working
satellites and possibly other bands.Â* I will work satellite passes from
Arizona, including AO-7 passes, and hope to recruit a small group of
operators who can work other passes that cover eastern North America along
with other places I cant work from here (Europe, North Africa, South
America).Â* I may also try to get some operators working HF with this call.

I will handle the QSL requests for W7O during this period. I am thinking of
incorporating the original QSL card design AMSAT used to confirm AO-7
reception reports from the 1970s in the W7O card.

The QSL cards will be printed after the W7O activity wraps up.Â* I will also
upload W7O QSOs to ARRLs Logbook of the World system.

Please contact me directly if you have any questions related to this
operation, or if you are willing to operate on satellites and/or HF as W7O
during this 10-day period.

Thanks in advance, and 73!

Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/
OSCAR 7 with Dick Daniels W4PUJ, Jan King K8VTR-W3GEY, Marie Marr and Perry
Klein K3JTE

The amateur radio satellite AMSAT-OSCAR 7 was launched by a Delta rocket
from Vandenberg Air Force Base on November 15, 1974 and provided many years
of service until it went silent from battery failure in mid 1981.

For 21 years nothing more was heard until June 21, 2002 when Pat Gowen
G3IOR came across a beacon sending slow 8 -10 wpm CW on 145.973.8 MHz. It
sounded like old OSCAR satellite telemetry, it had the familiar HI HI
followed by a string of numbers in groups of three. After monitoring by
many radio amateurs it turned out to be OSCAR-7, and it seemed to have come
back from the dead.

Pat’s email to the AMSAT Bulletin Board announcing his discovery can be
seen at

http://www.amsat.org/amsat/archive/a.../msg00525.html

It is believed that in 1981 the batteries failed short-circuit, however, in
2002 they became open-circuit enabling the satellite to run again from the
solar panels. Since that day OSCAR 7 has been operational when in sunlight
and provided radio amateurs with many long distance (DX) SSB/CW contacts.

Remember when working OSCAR 7 use the least uplink power possible to
minimize your downlink power usage, and maximize the number of simultaneous
contacts supported in the passband.

A BBC News report Radio ham finds lost satellite about the reception of
OSCAR 7 by Dave Rowan G4CUO can be seen at
http://news.bbc.co.uk/1/hi/england/2149381.stm

A collection of photos by Dick Daniels W4PUJ taken during the construction,
test and launch of the AMSAT-OSCAR 7 spacecraft in 1973 and 1974 can be
viewed at http://n4hy.smugmug.com/AMSAT/AMSAT-Oscar-7

Oscar 7 Information http://ww2.amsat.org/?page_id=1031

Video of 2E0HTS Working the OSCAR-7 Satellite
http://amsat-uk.org/2012/01/26/2e0ht...r-7-satellite/

2010 video of the then AO-7 distance record
http://www.southgatearc.org/news/jan...ao7_record.htm

‘Getting started on amateur radio satellites’ by G7HIA published in the
March 2007 RadCom. Download the article at
http://ukamsat.files.wordpress.com/2...dcom_mar07.pdf

Copyright 2007 Radio Society of Great Britain. For personal use only – no
copying, reprinting or distribution without written permission from the
RSGB.

Join the AMSAT Bulletin Board AMSAT-BB http://amsat.org/mailman/listinfo



///////////////////////////////////////////
ISS HamTV Presentation by G3VZV

Posted: 31 Oct 2014 10:22 AM PDT
http://amsat-uk.org/2014/10/31/iss-h...tion-by-g3vzv/

Front panel of the HamTV transmitter

In this video radio amateur Graham Shirville G3VZV talks about the
International Space Station (ISS) HamTV project. The presentation was given
to the BATC Convention on October 26, 2013.
Watch ISS Ham TV



Noel Matthews G8GTZ, Chair of the BATC, has announced the first 11
presentation videos from the CAT13 convention on ATV/DATV, held October 26,
2013, have been put up on the BATC video archive area.

They can be found in the http://batc.tv/ Film Archive by selecting the BATC
CAT13 category.

The direct links are as follows:

BATC review http://www.batc.tv/streams/cat1301

LNB developments http://www.batc.tv/streams/cat1302

HAB introduction http://www.batc.tv/streams/cat1303

Early colour cameras http://www.batc.tv/streams/cat1304

SMD techniques http://www.batc.tv/streams/cat1305

DTX1 DVB-S xmtr http://www.batc.tv/streams/cat1306

DATV in practice http://www.batc.tv/streams/cat1307

Spectrum matters http://www.batc.tv/streams/cat1308

10 GHz Tx multipliers http://www.batc.tv/streams/cat1309

10GHz PLL LNBs http://www.batc.tv/streams/cat1310

ISS HAMTV http://www.batc.tv/streams/cat1311