I have used my 847 with cat control without problem. So far today, the 847 will not transmit in sat mode but works fine when not in sat mode. Anyone have any quick suggestion? I am hearing all satelite great but, in satellite mode, The TX indicator comes on but no actual power. I would like to make my 1 contact before Field day is over. Thank,
Thanks for asking this question Michael, I too have spent the last couple
weeks trying to use HRD with my IC9100 and was overcome with frustration
that sometimes I would look at the radio and notice that one thing or
another was wrong.. (both of them were on USB or whatever). I then began
configuring the radio correctly then turning on tracking in HRD so all it
had to do was adjust freq.. I would only hear others however if i turned
the dial and searched for them.. Yesterday I installed SATPC32 and was
surprised how well it worked.
So - here is where I'm stuck..
1) I'm using the “turnstiled” Moxon rectangles for 2 m and 70 cm with
pre-amps. But in this scenario how much power do I need. I'm guessing 10
watts? Anything lower and my IC9100 doesn't appear to have any real
2) When I do talk (with appropriate mic gain) I think I hear myself but
it's just way over-modulated sounding. Using Heil Pro-set with icom
adapter.. Maybe today (field day) with the one FO29 pass I will try with
the ICOM microphone.. This will be my first linear bird as well. For
Field Day if anyone hears me, I will greatly appreciate a reply - and I
will be operating as K5EOK 3A.
3) How do I add the other 'channels' to SATPC32 for FO-29's
uplink/downlink.. Looks like it comes with only 435.850 programmed so I
need to add .860, .870, .880, .890 and .900 as well as .800 to .840.. but
why does it show in CAT tuning as 435850.45 with a downlink of 145952.15..
I would think it would be 850.0 and 950.0??
Thanks, and I apologize for my ignorance and desperation. It's sad that
I'm doing a field day demo of how fun satellites are but I can't make a
satellite contact to save myself.
73 N5ZY Marcus
Greetings North Texas friends of AMSAT and ARISS.
A great opportunity to showcase Amateur Radio and especially Amateur Radio
in space to the general public will be held on Saturday, July 18th at the
Frontiers of Flight Museum in Dallas, TX. In commutation of the anniversary
of the Apollo 11 moon landing, the museum has celebrated "Moon Day" for the
last number of years as a STEM outreach specializing in astronomy, space
science and space flight past and future.
This year the Moon Day organizers decided to theme the day around the
International Space Station. They applied for and were granted an ARISS
scheduled contact to become part of the event. Keith Pugh, W5IU is serving
as ARISS mentor for the event and is working diligently on setting up all
the details of this "Telebridge" contact. The museum is sponsoring an "Ask
a question of an astronaut" contest with details at
http://www.flightmuseum.com/iss-expedition-crew-43-question/ . General
details can be found at http://www.flightmuseum.com/moon-day-2015/ . If you
know young people interested in astronomy and space science/exploration,
have them check out the links and see if they submit a question to be used
during the ARISS contact. Deadline for entry is June 30th.
In years past, several of us have participated in Moon Day activities by
manning an AMSAT table showing off Amateur Radio in space and even doing
some on-air contacts for and with interested participants.
Keith will be very busy all morning setting up and preparing for the ARISS
contact and has several individuals working with him on that. I have
volunteered to help staff an AMSAT display table but need additional
volunteers to assist with the table and also to be available to make Amateur
Satellite contacts and demonstrations as the sats allow. Please contact
Keith w5iu(a)swbell.net or myself Tom Schuessler, n5hyp(a)arrl.net to volunteer
to help at least part of the day or the whole 10A-5P duration and tell us
what you can "Bring to the table" as it were.
Help us to support the Museum's ARISS contact and also to put a bug in the
ears of many event goers about the fun and challenge of Amateur Radio
Tom Schuessler, N5HYP
Is anyone working AO-7B successfully? I am not hearing it and the Live OSCAR Satellite Status Page is showing a variety of heard, not heard and conflicting reports. It also appears to be randomly switching to mode A. Does anyone have any info?
Added in the 3' ground plane...
OK, I did a quick look and the gain of the 3/4 wave vertical is a real
winner over the basic 1/4 wave vertical for OMNI Satgates with no moving
parts optimized for high elevation gain above 30 deg. Low elevations are
simply covered by another SATgate 600 miles away....
We will write it up in detail, but here are the rough figures.
1/4 wave vertical with radials: -2 at 30 and -6 at 60 ==> Basically a
3/4 wave vertical with radials: +2 at 30 and -1 at 60 ==> 4 to 5 dB
better, 2 dBi max
3/4 wave vertical w 3' gndpln: +3 at 30 and +1 at 60 ==> 5 to 7 dB better,
3.3 dBi max
3/4 wave vertical w 6' gndpln: +2 at 30 and +3 at 70 ==> 4 to 9 dB better,
5.5 dBi max
3/4 wave vertical w 9' gndpln: +3 at 30 and +3 at 65 ==> 5 to 9 dB better,
5.3 dBi max
3/4 wave vertical perfect gnd: +3 at 30 and +3 at 68 ==> 5 to 9 dB better,
6.9 dBi max
Even the 3/4 vertical with just the four 19" radials gives a huge 4 to 5 dB
improvement over a classic ground plane for omni satellite SATgate work.
Also, this antenna does not need to be high. Just see sky above 30 deg. In
fact, is better to be low to reduce terrestrial QRM.
Notice too that the Lilenblatt, eggbeaters, and all other "omni"s that try
to keep their gain down on the horizon, are equally as poor as the 1/4 wave
vertical at these higher elevations. This is OK for strong satellits like
the ISS with 5 to 10 watts, but abisimal when all that gain on the horizon
is completely wasted when you cannot hear the satellite anyway because it is
6 to 10 dB farther away! The result is these "omni's" give up the 4 to 9 dB
at higher elevations where the satellite is much stronger.
Ill eventually put all this on the Omni SATGATE page:
Summary: The 3/4 wave vertical makes it so you CAN hear LEO satellites 5 to
9 dB better when they are closer and does this by giving up on hearing
them when they are so far away you can't hear them anyway!
From: Robert Bruninga [mailto:[email protected]]
Subject: RE: [aprssig] APRS Satgate Antenna page
> One question,what constitutes a large ground plane?
> Is it 12"or 12'? Is it a multiple of the vertical whip?
Good question. Most people think that four 1/4 wave radials make a ground
plane. But if you model a 1/4 wave vertical over 1/4 wave radials, all you
get is the exact pattern of a DIPOLE. The radials are just providing a
"groundplane" to complete the electrical part of the antenna and give a good
match. They do not affect the pattern at all.
I modeled verticals over 6' or larger ground planes and only found that you
get the added "reflection" gain when the ground plane starts getting that
big or more. I wish I had time to use EZNEC to show the added gain
(skyward) versus the size of the ground plane. And how "radials" (above
actual ground) have nothing to do with the "pattern".
SO, the bigger the better. It should be worth 2 to 3 dB if you could make
it very large...
This is the page in question:
On 6/19/2015 3:57 PM, Robert Bruninga via aprssig wrote:
> Subject: APRS Satgate Antenna page
> Since the ideal APRS Satellite IGate OMNI antenna is exactly the
> opposite of the typical terrestrial IGaate antenna, I prepared the
> following WEB page:
> It shows how a vertical ¼ or ¾ wave VHF omni equals the performance of
> a full OSCAR class array (over half the sky) but does it with no
> moving parts.
> It makes up for the weak-signal horizon part of the sky by there
> simply being more omni-IGates. The APRS-IS cloud with all of its
> IGates is probably one of the largest spatially distributed satellite
> receiver system in the world (?).
> But with people used to the 10W transmitter on the ISS, just a few
> IGates can capture just about every packet from the ISS horizon to
> horizon on a whip. But with the 14 dB weaker signal from PSAT, we
> need more SatGates to make up for their smaller skyprint. For the USA
> we need more than a dozen such Omni-SATgates.
> To see the significance of the weaker downlink from PSAT, look at the
> successful IGates on the http://pcsat.aprs.org page compared to the IGates
> that hear the ISS packets on http://ariss.net Both are listening on
> 145.825 and passing along every packet they hear. But only TRACKING
> IGates or good vertical gain satgates hear PSAT. And since we want
> these running 24/7/365, we do NOT expect people wearing out motors
> when an omni will do fine (if we have enough).
> The page also shows how every SATgate with a HIGH and terrestrial type
> antenna actually creates a DEADZONE around it, effectively blocking
> any nearby user heaerd direct from appearing on any of the APRS-IS
> cloud satellite web pages. Hence, Omni-satgate antennas should be low
> to everything surrounding it w hile still seeing the sky above 30 degrees.
> If your TH-D7 HT is just sitting there, not in use 99% of the time,
> then just hook it to a vertical whip and let it be an IGate. With the
> low antenna it will also probably be safe from all weather lightening too.
> the UHF side on 435.350 and turn up the speaker. When PSAT PSK31
> comes into view, you can watch the PSK31 activity as a bonus!
> Bob, WB4APR
> aprssig mailing list
I know this topic has been debated for some time, but I believe by just
looking around the Wikipedia and google, AO-7 would have to be the longest
operating satellite around earth. All I have seen people mention is GOES 3
and ATS 3, but never once AO-7.. Even if it was silent for 21 years, it's
still technically the longest operating satellite. Can anyone else confirm
there are no other satellite older than it still operating? It's kinda hard
to find a current answer because it's always changing, and you have to
scavenge the internet. If so it would be awesome to think a low tech, ham
built satellite would beat a commercial, million dollar satellite...
The Snohomish County Washington HAMS Club WA7LAW will be participating in Field Day this year. I will be operating the satellite station for the club. Unfortunately, it looks like there is only one real good pass available on FO-29 for us, and that is at 2233Z. I will be in the upper end of the passband, around 435.870MHZ +/- Doppler. Please look for us and make a contact. I will answer any CW as well as SSB calls. We will not be joining the mele on SO-50!.73'...Ed WA7ETH
I am trying to get a clarification about using HamRadioDeluxe and linear birds. I have heard on several occasions that HRD and its associated satellite tracking module works fine for FM birds but not for linear birds. Can someone please clarify what the actual issue is? I currently have HRD version 6X and I am looking to purchase an IC9100 to mate it with. I have contacted the HRD support folks, but the answer I get is: "not sure, try it". Well, I don't have the IC9100 yet so I can't try it.
I have permission from my local AES outlet store to connect up my laptop to one of there IC9100 before I buy it. So, I need to know what the actual problem is with HRD and linear birds so I can try it in person.
I hope to get to the bottom of this once and for all.thanks in advance for anyone that wants to jump in on this.
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