I have a question for those of you much more experienced than I. It relates
to a satellite antenna installation I am working to accomplish this Spring.
I have two cross polarity yagis, one for 145 and the other for 435. Each
of these antennas has two separate feeds for the H and V polarities. The
two meter antenna has two feeds, both at about 14 inches from the end of the
antenna boom. Jumpers from the connectors will be secured to the very end
of the boom and trail off to main feed line connectors below the AZ rotor.
The mount point of this boom is 5' 2" from the end of the boom with the
driven element. The 70CM yagi is an end mount but the two connection points
are offset from each other. One is 17 inches from the back end of the boom
and the other is 24. Coax jumpers will again be attached to the boom and
will trail off to connections below my AZ rotor.
I will be using two separate rotors, (A G5400 or G5500 is not in the
paycheck right now), an elevation rotor with a 4'2" boom to mount the two
antennas and an azimuth rotor which will have a probably 2' maximum mast
from there to the EL rotor mount. All this will mount to an only half
extended push-up-pole, which is ground mounted but attached to the apex of
my single story house. Total height off the ground will probably be 20 feet
when all is said and done. I will be running 4 runs of not that flexible
9913 up to just below the AZ rotor and from there want to attach jumpers of
more flexible LMR 400 Flex to make the runs out to the antennas mentioned
My question is for your more math savvy or just plain experienced folks, is
how long should the jumpers be in total for each antenna to allow for a 360
degree rotation and 180 degree elevation shift based on the parameters I
described above??? I was guessing 10 to 11 foot jumpers from antennas to
the barrel connectors just below the AZ rotor but wanted to make sure that
that was long enough, or if they could be shorter, say maybe 9 feet. Of
course the 70 CM antenna with it's one feed point 7 inches further up the
antenna would need to be that much longer I guess. I also understand that
the 2 meter swing will be greater because of the more center mount rather
than the end mount on the 70 cm antenna.
Clear as mud???
This is new territory for me so I am wanting to make sure that all the
decisions are right before I need to do things over, and over, and over to
get it right. I can take some pictures if someone needs to see what I
described. Email me and I will give you my cell if you would rather talk or
ask questions verbally.
Thank you to the group in advance for your help and thoughts.
Tom Schuessler, N5HYP
I have been experiencing an arcing noise all over the vhf sat sub band and
the 17m band for months.Finally decided to look for it.As soon as I walked
out the door with H.T. in hand, it disappeared. Searching the house found
it to be both Verizon phone chargers.Unplugged them,problem gone on vhf
They must be mini switchers.
I've been planning a trip out west for about 6 months now and have plans to go through Nevada and take a whole week to operate from rare grids there. My plans have been firming up and I am looking at being there during the first half of May. Someone just told me that there is another ham, they did not know who, that is ALSO planning a trip to Nevada in May. I would like to find out who and where so that we can coordinate and not cause each other any problems, not to mention any chaos and confusion on the birds. I welcome someone else going... it will take pressure off of me as some of those grids are very rare and I would like a little time to sight see. It would just be nice if we could go at different times so that everyone has maximum chance to work those grids and the two of us not duplicate efforts. - Not to mention it would be nice if they went before or after me, so I'd get a chance to work them and vice versa. =^D
If anyone can foreward me any information, i would certainly appreciate it! Also, I will be posting info about my trip so a special QRZ page as well as a special twitter account.
Thanks & 73!
If I turn the vfo knob on the ft847 too fast , it will change modes from
lsb to usb on the radio.if I turn off cat cotrol
And turn it on again it cures the problem.
I have two ft 847 radios,it have tried both of them with the same results.
What am I doing wrong ?
I'm a tracking station for flighttracker24
> Anyone have any experience receiving and decoding ADS-B signals from their
> ground station. If so please give me a shout.
> tnx & 73 W9KE Tom Doyle
> Sent from my computer.
> tom ...
> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Luc Leblanc VE2DWE
Hope KM4IPF will be speaking at the the forum “Having Fun with SATs.
Also Hope spoke at a Luncheon for an open house sponsored by the Engineering Department at Old Dominion University to about 200 local middle and high school students from local schools touring the campus.
Event coordinated by K4AMG Club, K4AMG.org.
146/437-10 arrow with duplexer.
146/437 Alaskan arrow ,no duplexer
Almost no use, in
Excellent condition. $100 ea.$7 ship ea.
Also Argus ALL ALUMINUM camera
Tripod.No CHINESE junk. $25.
$10 SHIP .WB8RJY
AMSAT NEWS SERVICE
The AMSAT News Service bulletins are a free, weekly news and infor-
mation service of AMSAT North America, The Radio Amateur Satellite
Corporation. ANS publishes news related to Amateur Radio in Space
including reports on the activities of a worldwide group of Amateur
Radio operators who share an active interest in designing, building,
launching and communicating through analog and digital Amateur Radio
The news feed on http://www.amsat.org publishes news of Amateur
Radio in Space as soon as our volunteers can post it.
Please send any amateur satellite news or reports to:
ans-editor at amsat.org.
In this edition:
* AMSAT Forum Speakers at Dayton
* Just-Launched ISS Expedition 47/48 Crew Increment Includes Two Radio
* UK Student Balloon Crosses Pacific
SB SAT @ AMSAT $ANS-080.01
ANS-080 AMSAT News Service Weekly Bulletins
AMSAT News Service Bulletin 080.01
From AMSAT HQ Kensington, MD.
March 20, 2016
To All RADIO AMATEURS
AMSAT Forum Speakers at Dayton
The AMSAT forum will be Saturday morning from 11:15 a.m. through 1:30 p.m.
in Forum Room 5. See the commercial vendor layout map in the Hamvention
program or the Hamvention website for the location of Forum Room 5 (same
as the last few years).
The following speakers will be presenting at the AMSAT Forum:
Moderator: Mark Hammond, N8MH
"AMSAT Status Report" Barry Baines, WD4ASW, AMSAT-NA President, will
highlight recent activities within AMSAT and discuss some of our
challenges, accomplishments, projects, and any late breaking news.
"AMSAT-NA Satellite Program" Jerry Buxton, N0JY, AMSAT-NA Engineering Vice
President, will review the upcoming launches of four Fox spacecraft and
exciting new engineering developments.
"AMSAT's HEO and GSO Plans" Bob McGwier, N4HY, AMSAT-NA Director, will
discuss AMSAT-NA opportunities for High Earth Orbit and Geo-Synchronous
"AMSAT Satellite Operations" Drew Glasbrenner, KO4MA, AMSAT-NA Operations
Vice President, will survey the current operational amateur satellites, as
well as those planned for launch in the next year.
"ARISS Report 2016" Frank Bauer, KA3HDO, AMSAT-NA Vice President for Human
Spaceflight, will discuss ARISS developments & operation on the
International Space Station.
"Teaching STEM Using the Fox Satellites” Joe Spier, K6WAO, AMSAT-NA
Educational Relations Vice President, will explain how the Fox MEMS
gyroscopes, radiation experiments, and cameras will be used to teach
Science, Technology, Engineering, and Math (STEM).
[ANS thanks Steve, N9IP, for the above information]
Just-Launched ISS Expedition 47/48 Crew Increment Includes Two Radio
The Expedition 47/48 crew increment of Astronaut Jeff Williams, KD5TVQ, and
Cosmonauts Oleg Skripochka, RN3FU, and Alexey Ovchinin, is on its way to
International Space Station (ISS). Their Soyuz TMA-20M launched from the
Baikonur Cosmodrome in Kazakhstan on March 18 at 2126 UTC. The trio now is
safely in orbit.
“During their 6-month mission, the expedition crew members will facilitate
approximately 250 research investigations and technology demonstrations not
possible on Earth,” NASA said. “Science conducted also will enable
duration human and robotic exploration into deep space and on the agency’s
journey to Mars.”
Williams, Skripochka, and Ovchinin will join Expedition 47 Commander Tim
KE5UDN, European Space Agency astronaut Tim Peake, KG5BVI/GB1SS, and
Yuri Malenchenko, RK3DUP. Williams will take command of the station on
for Expedition 48. The three will return to Earth in early September.
This mission marks Williams’ fourth spaceflight and will be his third long-
duration stay on the orbiting laboratory — a first for an American. It’s
his first time back to the ISS since its completion in 2011. By the time
duty tour ends in September, Williams will become the new American
for cumulative days in space — 534 — surpassing Expedition 46 Commander
Kelly, who wrapped up his 1-year mission on March 1.
[ANS thanks ARRL for the above information]
UK Student Balloon Crosses Pacific
On Thursday, March 17 the UBSEDS14 balloon, launched by University of
students, had successfully crossed the Pacific and was above Arizona,
traveled over 24,500 km since launch. By March 19 the balloon had
United States and was headed out across the Atlantic Ocean.
The University of Bristol Students for the Exploration and Development
(UBSEDS) launched their balloon on Monday, March 8. Powered by a single AA
Lithium Energiser Battery (LR91) the balloon has been transmitting about
Contestia 16/1000 on 434.600 MHz USB at 4 minute intervals as well as APRS
during its flight at an altitude of about 11,000m.
The balloon uses the error-correcting Contestia 16/1000 mode on 434.6MHz
The transmission power on this band was measured to be +5dBm on a
which is well below the +10dBm limit for ISM band operation. Each packet
preceded by 10 seconds of 1Hz pips for manual alignment and a RSID tone for
automatic alignment with suitable software (dl-fldigi for example). For
countries the balloon transmits APRS packets on local frequencies. In
this is 144.8MHz in Europe, 144.66MHz in Japan and 144.39MHz in North
The balloon has a diameter of 1.5m and the payload weighs just 21.3 grams.
Despite the weight constraints the team have managed to employ
Geofencing technology to prevent the balloon transmitting when over certain
countries and also to select different APRS frequencies depending on the
territory being overflown.
UBSEDS14 information is available at
UBSEDS14 balloon launch
One of the students involved in the project is Richard Meadows M0SBU. He
the amateur radio courses run by the Chelmsford Amateur Radio Society
Danbury in Essex. Further information on the courses is available from
Email: training2016 at g0mwt.org.uk
[ANS thanks AMSAT-UK for the above information]
In addition to regular membership, AMSAT offers membership in the
President's Club. Members of the President's Club, as sustaining
donors to AMSAT Project Funds, will be eligible to receive addi-
tional benefits. Application forms are available from the AMSAT
Primary and secondary school students are eligible for membership
at one-half the standard yearly rate. Post-secondary school students
enrolled in at least half time status shall be eligible for the stu-
dent rate for a maximum of 6 post-secondary years in this status.
Contact Martha at the AMSAT Office for additional student membership
This week's ANS Editor,
Lee McLamb, KU4OS
ku4os at amsat dot org