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CX2SA > SATDIG 08.09.09 01:35l 804 Lines 34069 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. WD9EWK from DM31ov - report (Patrick STODDARD (WD9EWK/VA7EWK))
2. Alinco DJ-G7T Pro/Con reviews (w6zkh@xxxxxxx.xxxx
3. Re: Increasing range from LEO/SpaceX/APRS (Bruce Robertson)
4. 50mW on an Arrow (Larry Teran)
5. QSL requests for K8GI/P and K8GI/4 (Rick)
6. FO-29 Status (Yutaka Murata)
7. Re: Alinco DJ-G7T Pro/Con reviews (Andrew Glasbrenner)
8. Re: Alinco DJ-G7T Pro/Con reviews (David - KG4ZLB)
9. Re: Alinco DJ-G7T Pro/Con reviews (Glenn AA5PK)
10. Re: 50mW on an Arrow (Tim - N3TL)
11. Re: Alinco DJ-G7T Pro/Con reviews (Alan P. Biddle)
12. DJ-G7T reviews (w6zkh@xxxxxxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Sun, 6 Sep 2009 14:40:22 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] WD9EWK from DM31ov - report
To: amsat-bb@xxxxx.xxx
Message-ID: <412345.25393.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Despite the evening thunderstorms that rolled in from northern
Mexico, ruining my chance to work one more pass, my day-trip to
grid DM31 yesterday (Saturday, 5 September 2009) was successful.
I was able to look around the area, so I could have a better idea
of the surroundings than I could see in Google Earth or Google
Maps. That grid is less than 3 hours from my home, so this is a
destination I can visit on future day-trips.
As I drove toward DM31 near the USA/Mexico border on Arizona route
85, I made note of a spot that straddles the DM31ox/DM32oa grid
boundary. There is a place to safely pull off the highway, but
with mountains to the east and west of the highway I did not think
this would be a good spot to work from. I was not so concerned with
operating from the grid boundary; I can visit DM32 in an hour's
drive from Phoenix, but DM31 is not so convenient. I drove to the
small town of Lukeville, which is the Arizona side of this border
crossing point across from the Mexican city of Sonoyta. This point
is where most who are interested in visiting the Mexican town of
Puerto Penasco ("Rocky Point"), on the north end of the Gulf of
California just over 60 miles/100km away, cross the border. This
area allowed me a better view of the sky to the east and west than I
had at other points north of the border - without having to go
away from the highway and set up in an area that is less secure than
a border crossing complete with lots of law-enforcement personnel.
My location was in grid DM31ov - 31 52.915 N, 112 49.027 W. I
parked in a large parking lot at "Gringo Pass", which is a
complex complete with gasoline station, restaurant, grocery store,
and a duty-free store and auto-insurance agency for those heading
into Mexico. I did not have a Mexican ham-radio permit, and with
the security situation over there not being stable, I did not
cross the border even for a second. I walked up to the line, and
took photos around there - the plaque marking the international
border, a plaque on the Mexican customs house, the signs and flag
on the Mexican side of the border, looking along the border fence,
etc. I also took some photos of my portable station, and was able
to work an SO-50 pass at just after noon (1900 UTC).
For that pass, I logged 8 QSOs - mostly with stations near the
Pacific coast, with 3 being further east as the satellite moved in
that direction. A good start. I was ready for the first of two
AO-27 passes at 2049 UTC. When the repeater opened up, it was busy.
I was able to make QSOs with 17 stations from Mexico, the continental
USA, and even KL7XJ in Alaska showed up at the end of the 7-minute
repeater time. Before the next AO-27 pass, I had lunch and then
returned to the parking lot for the pass. That pass put 6 more QSOs
in the log.
I had planned to work 2 AO-51 passes, at 0026 and 0206 UTC. I
knew of a pass around 2254 UTC, a very shallow pass for me at
this location (maximum elevation 2 degrees). Since the first
possible AO-51 pass came not long after the western AO-27 pass,
I decided to try it from this location. I figured I might have
2 minutes or so when the satellite was at its highest to hear
something, let alone make QSOs. In the span of approximately 80
seconds, I heard the satellite, made a call, worked 3 stations,
then heard nothing when AO-51 went behind mountains northeast of
my location. If anyone has a recording of that pass from
yesterday, in particular the segment between 2255 and 2257 UTC,
and could e-mail me a copy of that - I would appreciate hearing
it.
After those 3 QSOs, I drove up the road toward the Organ Pipe
Cactus National Monument - which I drove through earlier - and to
the town of Why. The signs as you approach this little town answer
that "question" - gasoline, food, lodging, and camping. Other than
that, there's not much here other than an intersection with another
highway that heads east toward Tucson, 120 miles/200km away. There
was even a small casino about 2 miles/3km east of that intersection,
on the western edge of a large Indian reservation. After that drive
and picture-taking, I drove back to Lukeville.
The better eastern pass of AO-51 for me was at 0026 UTC. I was
ready, and worked a total of 16 stations - 6 in Mexico, and 10
across the USA. I appreciate the fact that I was able to make
QSOs with so many XE stations, as they are also interested in
working rare or unusual grids as many in the US are. This turned
out to be my last pass from DM31 for the day, unfortunately.
As the 0026 UTC AO-51 pass ended, I had a nice chat with a couple
of officers from the US Border Patrol. They were interested in
what I was doing with radio equipment, so close to the border.
They asked me what I was doing, which I explained to them. One of
the officers asked if I could listen in on their radio gear. I
said "no", thinking their radios were using some form of digital
transmissions (they each had commercial Motorola HTs on their
belts) and I did not have a receiver capable of decoding digital
voice communications. I understand why they might ask that question,
since there would be others that would be interested in listening in
on those transmissions. One of the officers stuck around for almost
20 minutes to chat (his uncle is a ham operator, but the officer
had not picked up this hobby), and we watched the dark clouds roll
in. Then he returned to his post - inspecting vehicles approaching
the Mexican border.
As the clock moved toward 0206 UTC, the start of the last pass I
planned to work, dark clouds started coming up from the southeast.
Then lightning started to strike around that part of the border
area. The lightning convinced me to shut down, dismantle my
station, and head home. I was able to drive about 5 miles/8km
north of the border, next to the visitor center at the nearby
Organ Pipe Cactus National Monument, and take some pictures of
the southern sky as it was being lit up by lightning. My camera
is a simple Sony 7.2-megapixel camera, which does not lend itself
for nighttime photography and doesn't have a fast shutter speed.
I was able to get some nice photos of the clouds in the sky as
the lightning lit them up.
On the way home, at another US Border Patrol highway checkpoint
about 60 miles/100km north of Lukeville, the two officers there
asked me where I was coming from and also about my radio gear.
Then one of them asked if I knew the code to access the front-
panel programming mode for a certain model of commercial Kenwood
HT - not the sort of question I expected to hear from those
officers. I didn't know about that, but we did talk for a few
minutes about radios and programming them before I was allowed to
continue on my way home. I did not mind talking with any of the
Border Patrol officers; they have a tough job trying to secure the
southern US border, and now performing inspections on vehicles
heading into Mexico (a new task, something that was never done on
a regular basis in the past for those leaving the US).
Despite not having the chance to safely work the last AO-51 pass,
this was a good day. A total of 50 QSOs went in the log on 5
different passes, and now I have a better idea of where to go to
work from DM31 in the future. Most of this grid is in Mexico, and
there are better locations without so many hills and mountains on
the other side of the border. Even down to "Rocky Point", which is
near the southern edge of DM31, would be a good place to set up
and operate - while having something cool to drink. :-) That will
have to wait, but I'll head down to the Arizona side of DM31 again
in the future.
Again, anyone interested in a QSL card confirming contacts made
with me from DM31 only needs to e-mail me the QSO details. No
SASE is needed. I hope to have cards in the mail in the next
week or so.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 2
Date: Sun, 6 Sep 2009 23:39:13 +0000 (UTC)
From: w6zkh@xxxxxxx.xxx
Subject: [amsat-bb] Alinco DJ-G7T Pro/Con reviews
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<1496805196.9569741252280353443.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxx
x.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Having read several threads here dealing with the Alinco Tribander HT, I would
like to hear from folks who are using said HT for full-duplex satellite
operation, either Pro or Con. I am looking for an HT for portable work while
RVing the country at the end of this month. All reviews will be greatly
appreciated.
John W6ZKH
------------------------------
Message: 3
Date: Sun, 6 Sep 2009 21:17:00 -0300
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] Re: Increasing range from LEO/SpaceX/APRS
To: Rocky Jones <orbitjet@xxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<49657a760909061717m3424bcfcr49fe20acfe5b7a62@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Fri, Sep 4, 2009 at 10:41 PM, Rocky Jones<orbitjet@xxxxxxx.xxx> wrote:
>
> Luc...I would add this.
>
> What is firmly missing in the amateur satellite effort is something
"repeatable" that encourages solid commercial gear to be available to people
who want to use the sats.
>
Rocky --
With respect, I wish once again to take issue with your view that
there is a dearth of both useful satellites and of commercial
equipment. Previously, you have represented this as a sort of negative
feedback loop, with useful satellites (and I understand to you this
means those equipped with SSB/CW linear transponder) dwindling in
number while commercial equipment becoming more scarce.
I would contend that on both sides you are incorrect. On the equipment
side, we have the IC-910H and the new all-in-one Icom rig, over which
this list has drooled. I myself use the TS-2000 with great enjoyment.
Sure, there are other models that have come and gone, but
price-for-performance, we're in satellite appliance-operator heaven
these days. (An aside for anyone new to this work who already has an
all-in-one rig that will work 144 and 435 in SSB and CW: another
option these days is to buy a second-hand FT-817 and, with clever use
of computer control you can have full doppler tuning with this
arrangement.)
>
> It is going to take about the same thing for hamsats...and one of those is a
continued supply of hamsats which encourage more communicating and less
experimenting....
Setting aside the contention that communication is the basis of this
branch of the hobby, note that we do have a very healthy assembly line
of LEO SSB/CW birds: KiwiSat's website has videos of them milling
their spaceframe, and they'll take your money to help launch the thing
at http://www.kiwisat.org.nz/funding.html; XW-1 from China is going
to be fun; SSETI-ESEO will have an S-band linear transponder; Delfi
n3xt; the next Indian Hamsat, and *anyone* that wants to cart PE1RAH's
little board into space for the relatively minor price of a cubesat
launch.
Moreover, in my experience, the majority of 'communicating' -- like it
or not -- is done on FM birds, again with a great deal of excellent
commercial equipment built for the purpose. Exhibit A: my trusty Arrow
Antenna, and SumbandilaSat will give us another target at which to
shoot our Arrows :-) in a couple of weeks.
http://www.southgatearc.org/news/september2009/sumbandilasat_launch_on_track.h
tm
> Thats what is intriguing about the SpaceX "launch" campaign...and indeed
about the entire changes that are occurring now with the Augustine commission
there is a chance for things developing like geo synch "rafts" where very
large satellite complexes etc are built. ?But ham radio will not in my view
have a seat at that table unless and until there is some "normalcy" in the
mode.
Perhaps more tendentiously, I would finally contend that we amateur
satellite folks have indeed created a new normalcy: the steady flow of
cubesats and their launches. Until recently, it has been hard for us
to capitalize on this situation for two-way communication purposes,
but with Delfi C3 and, now, FunCube, I think we're well on our way. As
Bob has persistently argued, maybe we should just shoot for 1200 bps
and provide a real and workable service through a LEO network.
> I spent part of the afternoon talking with a condo owner on Clear Lake about
the Club moving its APRS/voice machine to the top of his 14 story building (a
virtual skyscraper in this part of Houston)...it was amazing how fast he came
around, all he could think of was what went on in Hurricane Ike.
That's great work! Thanks for doing it.
73, Bruce
VE9QRP
------------------------------
Message: 4
Date: Mon, 7 Sep 2009 00:55:47 -0700
From: Larry Teran <satvader@xxxxxxx.xxx>
Subject: [amsat-bb] 50mW on an Arrow
To: <amsat-bb@xxxxx.xxx>
Message-ID: <BAY109-W339811D65D59992492FF60CDEB0@xxx.xxx>
Content-Type: text/plain; charset="Windows-1252"
Hi All! if the subject of this post call attention on you is because that
sounds familiar to you on these last days QSO's on the birds, before I
continue with this post I will type some words that shows the enthusiasm of a
person to success!
It's better to try and fail
than to never try at all..... because sometimes you don't fail!
those are the words sent to me on an email, from KG6NUB Sawson, I sure that
most people here know him very well, for me he has been a great help since I
started working satellites, I remember my self asking him to send me an email
because I was not able to copy his call, and he did just after the satellite
go down on the horizon, he also helped me to set up for ISS APRS, send me the
schematics to make my first sound card interface, and he makes arrangements to
help me work Hawaii for the first time on a very low elevation on SO-50, he
reply on emails so fast, and he is always with a solution when you have a
problem. And he stay late on the night.something different the the rest of us
is that he is not hunting QSL Cards nor he's in a hurry to get any awards, but
more in the hearth of this hobby the technical part, I ask him once about
using a preamp and he told me that he will spend that money buying more
aluminium to make a bigger antenna.On recent days I was able to purchase an HT
so I added to my satellite station and finally I was able to listen to my self
and free from the little 10W duplexer on my arrow antenna, so been able to
cennetct both radios my mobile and my HT I was ready to power up with 50W on
my uplink!!! (OH YEAH every body will listen to KI6YAA and I will step on them
jejejej!)and just when I was about to become a satellite hog, Sawson get out
working with 50mw on his arrow antenna, he also worked the same power on a
whip, and if that is not much he contacted Hawaii with the same settings. That
teach me a good lesson and remains me of what I learned a few moths ago by
studying for my ham exam, use as low power as necessary to complete your
contact, Below is a copy of his recent email sent to me with details of his so
famous "50mW on an arrow" work.Thakns Sawson for all your Help! KI6YAA
From:Sawson -KG6NUB (sawson@xxxx.xxxxxxxx.xxxxxxxxxxxx 9/06/09 10:23
PMTo:Larry Teran (satvader@xxxxxxx.xxxx>Earlier in the week on AO27, there was
4.35 degrees peak. I only had
>my AL800 whip with me and didn't even want to try working NH7WN.
>Robert convinced me to try. To my amazement, I was getting in so
>loud on 5W, I lowered it to 0.5W and still got in! I tried 50mW but
>was too weak. This convinced me on a quiet pass 50mW + whip is
>possible. Two days later I worked Hawaii on 50mW. See the attached
>files. So the lesson learned is.... it's better to try and fail
>than to never try at all..... because sometimes you don't fail!
_________________________________________________________________
Windows Live: Make it easier for your friends to see what you?re up to on
Facebook.
http://windowslive.com/Campaign/SocialNetworking?ocid=PID23285::T:WLMTAGL:ON:W
L:en-US:SI_SB_facebook:082009
------------------------------
Message: 5
Date: Mon, 7 Sep 2009 08:48:54 -0400
From: Rick <rick.k8gi@xxxxx.xxx>
Subject: [amsat-bb] QSL requests for K8GI/P and K8GI/4
To: <amsat-bb@xxxxx.xxx>
Message-ID: <4aa5014a.02045a0a.20d8.ffffc89e@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Guyz:
I'll be wrapping up my trip in a few days. If you contacted be from
EM98/EM99, EM98 or EM97 (as K8GI/P), or EM96, EM94 or EM91 (as K8GI/4), and
you want a QSL card from me, kindly proceed as per my 08/26/09 msg on
"AMSAT-BB." It will be helpful if any such requests are received by next
Monday, 09/14, so I can get them out that week. I also need to know how
many cards to make for a couple of those QTHs. (I worked a couple more
grids than originally planned.)
73!
Rick
'GI
------------------------------
Message: 6
Date: Mon, 07 Sep 2009 22:01:57 +0900
From: Yutaka Murata <yutaka.murata@xxxxx.xx.xx>
Subject: [amsat-bb] FO-29 Status
To: amsat-bb@xxxxx.xxx
Message-ID: <4AA50445.8030505@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi FO-29 Guys
This is FO-29 status from JARL command team.
This was written in Japanese and I translated to English.
-----------------------------------------------------------
FO-29 status in 2009
FO-29 launched in August 1996 and has been working 14 years.
FO-29 is planning to operate the consecutive use with the analog
transponder until the end of August 2009, but it was confirmed that a
transponder stopped on August 25.
In the later pass, the transponder operation is confirmed when we sent a
command of transponder ON from the control station, but we stopped
transponder temporarily now.
We had the a similar symptom of stopping the transponder in the spring
of 2007 .
FO-29 is in the "high shade rate period" now.
Both of the transponder stop in the spring of 2007 and this time are
thought that by this "high shade rate" and by the rise of the internal
resistance of the deterioration of the battery and by the influence of
the temperature of the battery.
The power control system FO-29 (PCU) watches a terminal voltage of the
battery and turns off the power supply of the transmitter automatically
if it becomes less than the setting voltage. In addition, When FO-29
enters the sunshine area and it recovers to the setting voltage by sun
battery power, it is designed to turn on a transmitter automatically.
However malfunction occurred for this function in 2007.
Because of transmitter was not turned on automatically, We made an
operation schedule plan from the summer of 2007 and managed 1-2 times on
in a day.
This management operation worked well. The electricity income and
expenditure restored or it was cured spontaneously.The transponder has
been worked without control command from control station from summer of
2008.
The power supply circumstances of current FO-29 is almost same situation
as stop period spring of 2007, scheduled operation period, the
consecutively operative period from the summer of 2008 and it is in a
"high shade rate". This transponder off is supposed to be a similar
situation as when transponder stopped in the spring of 2007.
From this , We decided that we make the operation schedule plan, and
manage the limit of the operative number of times in one day like last
time to keep the electricity income and expenditure untill improve the
"shade rate" which is in January, 2010.
-----------------------------------------------------------------------
Thanks control team
JA1COU Yutaka Murata
------------------------------
Message: 7
Date: Mon, 7 Sep 2009 09:58:36 -0400
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Alinco DJ-G7T Pro/Con reviews
To: <w6zkh@xxxxxxx.xxx>, "amsat-bb" <amsat-bb@xxxxx.xxx>
Message-ID: <1887A9E5E4CF47E0BC248ECBF91EDD67@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I have one of the first 100 released at Dayton, and have not done any
firmware upgrades yet. It is useless as a full duplex satellite radio, as
the amount of desense is greater than the satellite downlink most of the
time. Neat radio otherwise, and I've used the 1.2 GHz with my hamfest buddy
quite often.
If you can find a FT-530 Yaesu used, they are the best full duplex satellite
HT I've ever used. A used Kenwood D7 would be almost as good, plus you could
use it for APRS while not on the satellites, or for use with the ISS. You
can always go the two radio route as well. A simple 2m HT and a small 435
scanner or HT can be had for very little!
Good Luck,
Drew KO4MA
----- Original Message -----
From: <w6zkh@xxxxxxx.xxx>
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Sent: Sunday, September 06, 2009 7:39 PM
Subject: [amsat-bb] Alinco DJ-G7T Pro/Con reviews
> Having read several threads here dealing with the Alinco Tribander HT, I
> would like to hear from folks who are using said HT for full-duplex
> satellite operation, either Pro or Con. I am looking for an HT for
> portable work while RVing the country at the end of this month. All
> reviews will be greatly appreciated.
>
> John W6ZKH
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Mon, 07 Sep 2009 10:02:47 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Alinco DJ-G7T Pro/Con reviews
To: glasbrenner@xxxxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4AA51287.6020807@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Or of course the venerable Icom W32A, still a great radio!
David
KG4ZLB
Andrew Glasbrenner wrote:
> I have one of the first 100 released at Dayton, and have not done any
> firmware upgrades yet. It is useless as a full duplex satellite radio, as
> the amount of desense is greater than the satellite downlink most of the
> time. Neat radio otherwise, and I've used the 1.2 GHz with my hamfest buddy
> quite often.
>
> If you can find a FT-530 Yaesu used, they are the best full duplex satellite
> HT I've ever used. A used Kenwood D7 would be almost as good, plus you could
> use it for APRS while not on the satellites, or for use with the ISS. You
> can always go the two radio route as well. A simple 2m HT and a small 435
> scanner or HT can be had for very little!
>
> Good Luck,
> Drew KO4MA
>
> ----- Original Message -----
> From: <w6zkh@xxxxxxx.xxx>
> To: "amsat-bb" <amsat-bb@xxxxx.xxx>
> Sent: Sunday, September 06, 2009 7:39 PM
> Subject: [amsat-bb] Alinco DJ-G7T Pro/Con reviews
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
------------------------------
Message: 9
Date: Mon, 7 Sep 2009 09:19:38 -0500
From: "Glenn AA5PK" <aa5pk@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Alinco DJ-G7T Pro/Con reviews
To: <kg4zlb@xxxxx.xxx>, <w6zkh@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <74BBE5355CDE489B81453AAA1720AC89@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
My 3-watt IC-W2A works well also.
Glenn
AA5PK
----- Original Message -----
From: "David - KG4ZLB" <kg4zlb@xxxxxxxxxx.xxx>
To: <glasbrenner@xxxxxxxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Monday, September 07, 2009 9:02 AM
Subject: [amsat-bb] Re: Alinco DJ-G7T Pro/Con reviews
> Or of course the venerable Icom W32A, still a great radio!
>
> David
> KG4ZLB
>
> Andrew Glasbrenner wrote:
>> I have one of the first 100 released at Dayton, and have not done any
>> firmware upgrades yet. It is useless as a full duplex satellite radio, as
>> the amount of desense is greater than the satellite downlink most of the
>> time. Neat radio otherwise, and I've used the 1.2 GHz with my hamfest
>> buddy
>> quite often.
>>
>> If you can find a FT-530 Yaesu used, they are the best full duplex
>> satellite
>> HT I've ever used. A used Kenwood D7 would be almost as good, plus you
>> could
>> use it for APRS while not on the satellites, or for use with the ISS. You
>> can always go the two radio route as well. A simple 2m HT and a small 435
>> scanner or HT can be had for very little!
>>
>> Good Luck,
>> Drew KO4MA
>>
>> ----- Original Message -----
>> From: <w6zkh@xxxxxxx.xxx>
>> To: "amsat-bb" <amsat-bb@xxxxx.xxx>
>> Sent: Sunday, September 06, 2009 7:39 PM
>> Subject: [amsat-bb] Alinco DJ-G7T Pro/Con reviews
>>
>>
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Mon, 7 Sep 2009 07:23:59 -0700 (PDT)
From: Tim - N3TL <n3tl@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: 50mW on an Arrow
To: Larry Teran <satvader@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <612822.28451.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Larry,
My congratulations to you and Sawson on your recent satellite work using very
low power levels. This is something I also have enjoyed very much over the
past year, using my Yaesu-VX-7R at .05-watt (50 mW) with a variety of
antennas, including the AL-800, to log contacts with stations in 30 states,
plus Canada, Mexico and Venezuela. My location will not permit me to work all
states on the FM satellites, but I suspect that either of you have the
opportunity to do that using 50 mW out. It will, indeed, be a challenge for
you, but I believe it is one you can achieve. If you decide to pursure such a
goal, I wish you the very best in your efforts.
I will begin listening for you and Sawson on passes to my west, and hope that
we can complete a contact with each of us transmitting only 50 mW. I suspect
it is a very rare contact when each ground station is transmitting far less
power than the satellites they are working through!
73 to all,
Tim - N3TL
Athens, Ga. - EM84ha
________________________________
From: Larry Teran <satvader@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Monday, September 7, 2009 3:55:47 AM
Subject: [amsat-bb] 50mW on an Arrow
Hi All! if the subject of this post call attention on you is because that
sounds familiar to you on these last days QSO's on the birds, before I
continue with this post I will type some words that shows the enthusiasm of a
person to success!
It's better to try and fail
than to never try at all..... because sometimes you don't fail!
those are the words sent to me on an email, from KG6NUB Sawson, I sure that
most people here know him very well, for me he has been a great help since I
started working satellites, I remember my self asking him to send me an email
because I was not able to copy his call, and he did just after the satellite
go down on the horizon, he also helped me to set up for ISS APRS, send me the
schematics to make my first sound card interface, and he makes arrangements to
help me work Hawaii for the first time on a very low elevation on SO-50, he
reply on emails so fast, and he is always with a solution when you have a
problem. And he stay late on the night.something different the the rest of us
is that he is not hunting QSL Cards nor he's in a hurry to get any awards, but
more in the hearth of this hobby the technical part, I ask him once about
using a preamp and he told me that he will spend that money buying more
aluminium to make a bigger antenna.On recent days
I was able to purchase an HT so I added to my satellite station and finally I
was able to listen to my self and free from the little 10W duplexer on my
arrow antenna, so been able to cennetct both radios my mobile and my HT I was
ready to power up with 50W on my uplink!!! (OH YEAH every body will listen to
KI6YAA and I will step on them jejejej!)and just when I was about to become a
satellite hog, Sawson get out working with 50mw on his arrow antenna, he also
worked the same power on a whip, and if that is not much he contacted Hawaii
with the same settings. That teach me a good lesson and remains me of what I
learned a few moths ago by studying for my ham exam, use as low power as
necessary to complete your contact, Below is a copy of his recent email sent
to me with details of his so famous "50mW on an arrow" work.Thakns Sawson for
all your Help! KI6YAA
From:Sawson -KG6NUB (sawson@xxxx.xxxxxxxx.xxxxxxxxxxxx 9/06/09 10:23
PMTo:Larry Teran (satvader@xxxxxxx.xxxx>Earlier in the week on AO27, there was
4.35 degrees peak. I only had
>my AL800 whip with me and didn't even want to try working NH7WN.
>Robert convinced me to try. To my amazement, I was getting in so
>loud on 5W, I lowered it to 0.5W and still got in! I tried 50mW but
>was too weak. This convinced me on a quiet pass 50mW + whip is
>possible. Two days later I worked Hawaii on 50mW. See the attached
>files. So the lesson learned is.... it's better to try and fail
>than to never try at all..... because sometimes you don't fail!
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------------------------------
Message: 11
Date: Mon, 7 Sep 2009 10:14:55 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: Alinco DJ-G7T Pro/Con reviews
To: <amsat-bb@xxxxx.xxx>
Message-ID: <330BAA7712394EAF85746DC37FDEC383@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
I have one which I received in July after waiting for 2+ months. I have the
latest, as of today, firmware installed.
My experience with mine is that the RX sensitivity does not meet
specifications, and the sub band is worse than the main band. I have an old
Icom IC-T7H, same published specification, for comparison. With the same
location exactly, same antenna exactly, distant repeaters which are full
quieting on the IC-T7H are scratchy on the main band, and worse or
unreadable on the sub band. This has been my experience as well with my Elk
antenna and AO-51, though doing A/B testing is much harder there. This is
with wideband receive off, all attenuation off. The sub band sensitivity is
the same, not transmitting, with full duplex on or off. I see the same
extreme desense when transmitting in full duplex.
I have experimented with using it for an APRS digi, as it is unlikely to
ever be a truly viable satellite rig. For that, it works very well with a
few caveats. First, the squelch is very slow opening, so it is better to
operate with it open and use tone detection. Surprisingly, there is no
preemphasis going through the microphone jack, so you need to add in the
twist externally.
The cloning software is more like alpha than beta. There are several things
which either don't work, or crash. In one case, the crash is the kind that
gets you a "Report to Mother Microsoft" message. However, they are working
on it, and with each new release it is more useful.
It will probably be a neat package for ordinary usage when they get finished
beta testing it. There have been several improvements, including some not
covered in the release notes, in the firmware updates.
Alan
WA4SCA
------------------------------
Message: 12
Date: Mon, 7 Sep 2009 15:39:44 +0000 (UTC)
From: w6zkh@xxxxxxx.xxx
Subject: [amsat-bb] DJ-G7T reviews
To: amsat-bb@xxxxx.xxx
Message-ID:
<38645404.9726481252337984192.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.
xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Thanks to all who have replied to my request for reviews on this HT. Concensus
looks like it isnt worth a hill of beans for satellite work, and I appreciate
all comments. Sure wish I hadnt sold that W32 years ago !! Tnx again,
John W6ZKH
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 4, Issue 451
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