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CX2SA > SATDIG 21.01.12 20:19l 695 Lines 23288 Bytes #999 (0) @ WW
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Sent: 120121/1915Z @:CX2SA.SAL.URY.SA #:48125 [Salto] FBB7.00e $:AMSATBB737
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Building a Distributed Satellite Ground Station Network (Trevor .)
2. Re: Hamtronics converter (David Reinhart)
3. Testing a UHF antenna (normn3ykf@xxxx.xx.xxxx
4. Re: Getting "Cheep" ... (George Henry)
5. SpaceX Flight Delayed Again (B J)
6. Re: getting "cheep" on the birds! (Pun intended) (Bob- W7LRD)
7. HI4/AJ5C update (Bob Herrell)
8. Re: Hamtronics receive converters (Douglas Quagliana)
9. RS-39 (Chibis-M) Deploys January 25 (Trevor .)
10. Re: RS-39 (Chibis-M) Deploys January 25 (Trevor .)
11. Re: Testing a UHF antenna (i8cvs)
12. Re: RS-39 (Chibis-M) Deploys January 24 (Trevor .)
13. Thanks for all the personal Emails! (K4FEG)
14. Re: Thanks for all the ... (Clint Bradford)
15. Yaesu 847 for sale (Jeff KB2M)
16. Working VO-52 with an FT-817ND and TH-F6A
(Patrick STODDARD (WD9EWK/VA7EWK))
17. Re: Thanks for all the ... (Andre)
----------------------------------------------------------------------
Message: 1
Date: Fri, 20 Jan 2012 20:28:28 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Building a Distributed Satellite Ground Station
Network
Message-ID:
<1327091308.56561.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
There was a presentation on building a distributed satellite ground station
network at the Chaos Communication Congress held December 27-30 and the
video is now available.
The AMSAT-UK FUNcube Dongle VHF/UHF Software Defined Radio gets a brief
mention at 39:26 into the video.
See http://www.uk.amsat.org/3892
73 Trevor M5AKA
----
------------------------------
Message: 2
Date: Fri, 20 Jan 2012 15:29:24 -0500 (EST)
From: David Reinhart <wa6ilt@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Hamtronics converter
Message-ID: <53d5db80.19045d.134fccf346d.Webtop.46@xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed; delsp=no
One thing I learned the hard way about Hamtronics converters is that
they can't take any transitory transmit RF. Just powering up my old
TS-440S with a UHF Hamtronics converter attached would blow the MMIC.
David Reinhart
WA6ILT
------------------------------
Message: 3
Date: Fri, 20 Jan 2012 16:02:46 -0500
From: <normn3ykf@xxxx.xx.xxx>
To: "AMSAT-BB@xxxxx.xxxx <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Testing a UHF antenna
Message-ID: <20120120210246.EOVMX.207616.root@xxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
Hi all.
Am in the process of building a quadrifiliar helix antenna using this page:
http://jcoppens.com/ant/qfh/calc.en.php .
How much cable should I use between the device under test and the antenna
analyzer? I've got a Times T-100
73 de Norm
------------------------------
Message: 4
Date: Fri, 20 Jan 2012 13:05:12 -0800 (PST)
From: George Henry <ka3hsw@xxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Getting "Cheep" ...
Message-ID: <1327093512.95149.YahooMailRC@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Whenever I do a satellite demo with my 910H, Gulf Alpha CP antennas, az/el
rotors, and computer control, I always take along an HT and a tape measure
beam
& show my audience that the FM birds *can* be worked with a much simpler
setup.
HOWEVER, I always stress the same rule of thumb that applies to HF operations:
"if you can't hear 'em, you can't work 'em", so if they *don't* hear the bird,
STOP trying, and find & fix the problem...
George, KA3HSW
----- Original Message ----
> From: John Geiger <aa5jg@xxxxxxx.xxx>
> To: Clint Bradford <clintbradford@xxx.xxx>
> Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
> Sent: Fri, January 20, 2012 1:55:57 PM
> Subject: [amsat-bb] Re: Getting "Cheep" ...
>
> I do think we need to be careful that we don't send the message that you
> must have a complex (and expensive) station to work the FM sats. I
> wouldn't want someone interested in the sats to give up because they
> thought they needed circularly polarized yagis, elevations rotors, mast
> mounted preamps, and computer control for doppler shift.
[snip]
------------------------------
Message: 5
Date: Fri, 20 Jan 2012 23:10:33 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SpaceX Flight Delayed Again
Message-ID:
<CAP7QzkN3RDgJfWFORJZH2s3iWhN=FnoUSRMyPAMjc2247rH26g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://spaceflightnow.com/falcon9/003/120120delay/
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 6
Date: Fri, 20 Jan 2012 23:35:25 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: K4FEG <K4FEG@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: getting "cheep" on the birds! (Pun intended)
Message-ID:
<790069274.30988.1327102525416.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
like most everything else, "you get what you pay for".? I suggest those who
want to get the cheep stuff.??Donate the money you would have spent to
AMSAT.? This is rocket science, and that ain't "cheep".
73 Bob W7LRD
----- Original Message -----
From: "K4FEG" <K4FEG@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Friday, January 20, 2012 4:52:53 AM
Subject: [amsat-bb] getting "cheep" on the birds! (Pun intended)
There seems to have been a rash of postings lately about how to get on
the the "birds" for "cheep" ( yes the pun is implied!).
IMHO cheap is not always equated with good. No one wants the "cheapest"
Doctor around or the "cheapest" lawyer or the "cheapest" anything.
With the demise of AO51 and the loss of its simple operating
characteristics, there has been a migration to the "less" popular
satellites. Most of the other FM satellites are no where near as "user
friendly" as AO51 was.
With people suggesting that people can get on to the satellites with an
inexpensive Chinese made dual band HT and a "telescoping" antenna and
nothing else, they are creating a perception that that is all you need
to have a successful satellite station.
Nothing could be further from the truth! ?AO27 has a 7 minute timer,
there are increasing numbers of people who will call CQ the entire
satellite pass over North America and never answer a single response to
their "CQ's", and for some unknown reason these stations NEVER have an
email address listed on their QRZ listing. Some of us actually use the
satellites and do not like it when operators have been told they do not
need a preamp or a good antenna or a good radio.
It is much simpler to get into the uplink of the satellite than it is to
hear it.
I wish some of the "self-proclaimed" experts would tell these people
that if they cannot hear themselves on the downlink that does not mean
that they are not keying the satellite.
If people are going to encourage people to get on the satellites, teach
them how to use the satellites, not how they can get on the satellites
for less than $100.00. They are getting on the satellite and causing
interference for those that have invested in the equipment to take
proper advantage of what the satellites have to offer.
Some of the people that are pontificating profusely on the subject of
operating "for cheap" I have never heard on the satellites.
Encouraging people to become active is one thing, but giving people the
impression that all they have to do is get a basic $80.00 radio and a
telescoping antenna and they will have a top notch satellite station
tantamount to turning an untrained Doctor loose to do surgery.
For those that want to encourage people to get active, how about
teaching or recommending proper operating techniques, before you tell
them how "cheaply" they can get on the satellites.
AO27 has such a short timer that good technique is paramount for getting
the best use out of it, and SO50 has plenty of "quirks" to make it a
challenge at times for the "seasoned" operator.
I hope some of those promoting their own ideas of satellite use on a
budget would spend more teaching rather than recommending how much money
they can save by getting the least expensive gear available.
good radio, receive preamp, decent antenna & Patience = a good beginner
satellite station!
If you can't hear the bird, doesn't mean it's not hearing you!
I am happy to speak to anyone that is interested in satellite
communications, you can check out my QRZ page.
73's
Frank
K4FEG
_______________________________________________
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: 7
Date: Fri, 20 Jan 2012 22:58:43 -0400
From: Bob Herrell <bob72601@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HI4/AJ5C update
Message-ID:
<CAMQtZ2TTd6Y7U5mC2mB7VFpk-4hvDyi27JR49aF9mhfg2fZHHQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Good contacts for 1/20/12 AO-27 1853z de HI4/AJ5C: N9AMW, KB0RZD, W5PFG/m,
K5OE/m, K0BAM, NX9B, N4ZQ and K8BL/4. 73 Bob
------------------------------
Message: 8
Date: Fri, 20 Jan 2012 23:05:27 -0500 (EST)
From: Douglas Quagliana <dquagliana@xxx.xxx>
To: aa5jg@xxxxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Hamtronics receive converters
Message-ID: <8CEA6090B112200-11D8-E641@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi John,
Hamtronics previously offered a UHF receive converter. It was available as
a kit and was a mix
of through-hole components and surface mount. This was the first surface
mount kit that I built.
There were two options for the crystals, so that it would convert either
435.0 MHz or 435.5 MHz
down to 28.0 MHz depending on which crystal was installed in the circuit
board. One note
of caution: If you want to use it for AO-27 ( at 436.8 MHz ) then verify
that your receiver will
tune past 29.7 MHz up to 29.8 MHz, or get the crystal to convert 435.5 MHz
down to 28.0 MHz.
Some ten meter receivers only tune up to 29.7 MHz. Also, tuning up some of
the coils required
a special tuning tool from Hamtronics.
We measured my receive converter at the 2010 International EME Conference in
Dallas last year.
My receive converter had about a 6.3 dB noise figure and 15.1 db gain.
In my experience, it always required a low noise preamp in order to be
useful for receiving
satellite signals. Whether the preamp requirement was due to the design or
whether it was
because this kit was the first surface mount kit that I ever built was
something that I
never determined. :-) The preamp that I used in front of it measured 1.55
dB noise figure
with 14.3 db gain. The combination of low noise preamp and downconverter
worked very
well with an HR2600 on AO-27 and AO-51.
A few more details are available at:
http://www.amsat.org/amsat-new/information/faqs/mobileQRP.php
TLDR: Yes, they used to offer it. If you see one for a couple bucks at a
hamfest, grab it
and use it with a low noise preamp.
73,
Douglas KA2UPW/5
-----Original Message-----
From: John Geiger <aa5jg@xxxxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Sent: Fri, Jan 20, 2012 10:41 am
Subject: [amsat-bb] Hamtronics receive converters
Does anyone know if Hamstronics has made a UHF receive converter? The
currently make one for 2m, but I would like one to use for FO29, if
possible.
73s John AA5JG
_______________________________________________
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: Sat, 21 Jan 2012 11:15:35 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] RS-39 (Chibis-M) Deploys January 25
Message-ID:
<1327144535.68679.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The team of RS-39 will very much appreciate any reception reports of
?Chibis-M?. Special attention is requested for the first orbits as these are
outside of control stations for ?Chibis-M?. Each report will be confirmed by
special QSL card.
See
http://www.uk.amsat.org/3910
73 Trevor M5AKA
AMSAT-UK: http://www.uk.amsat.org/
----
------------------------------
Message: 10
Date: Sat, 21 Jan 2012 12:12:06 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: RS-39 (Chibis-M) Deploys January 25
Message-ID:
<1327147926.74005.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The Morse Code telemetry format is at
http://tinyurl.com/RS-39-Morse-Code-Telemetry
73 Trevor M5AKA
--- On Sat, 21/1/12, Trevor . <m5aka@xxxxx.xx.xx> wrote:
> Date: Saturday, 21 January, 2012, 11:15
> The team of RS-39 will very much
> appreciate any reception reports of ?Chibis-M?. Special
> attention is requested for the first orbits as these are
> outside of control stations for ?Chibis-M?. Each report
> will be confirmed by special QSL card.
>
> See
>
> http://www.uk.amsat.org/3910
>
> 73 Trevor M5AKA
> AMSAT-UK: http://www.uk.amsat.org/
> ----
------------------------------
Message: 11
Date: Sat, 21 Jan 2012 17:30:04 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: <normn3ykf@xxxx.xx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Testing a UHF antenna
Message-ID: <001801ccd859$ef226740$0401a8c0@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
> Hi all.
> Am in the process of building a quadrifiliar helix antenna using this
page: http://jcoppens.com/ant/qfh/calc.en.php .
> How much cable should I use between the device under test and the antenna
analyzer? I've got a Times T-100
> 73 de Norm
Hi Norm
I was looking at http://jcoppens.com/ant/qfh/calc.en.php .
but unfortunately there are not informations on how to connect the
4 by 1/2 wavelength loops to get End-Fire or Back-Fire radiation
from the quadrifiliar helix antenna as well no information to get a
50 ohm match properly connecting the 4 terminals of the loops to
the infinite balun so that I suggest you to read the article:
"Experimental Investigation of Quadrifilar Helix Antennas for
2400 MHz" published into the AMSAT-Journal May-June 2004
BTW, about your question the lenght of coax cable between the device
under test and the antenna analyzer must be any even or odd numbar of
1/2 electrical waveleght of coax cable for the frequency in use where
the 1/2 electrical wavelenght of the coax cable is the 1/2 free wave
multiplied by the velocity factor Vf of the coax used i.e.Vf = 0.66 for
RG-213
When the lenght of any transmission line is 1/2 electrical waveleght the
impedance at one end of it is the same at the other end of it i.e. the
impedance of the antenna will be seen unchanged at the antenna analyzer
input connector no matter the value of the VSWR.
73" de
i8CVS Domenico
------------------------------
Message: 12
Date: Sat, 21 Jan 2012 16:40:55 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: RS-39 (Chibis-M) Deploys January 24
Message-ID:
<1327164055.38875.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
A Moscow to UT conversion discrepency - the time should say January 24 at
23:14 UT
However, the NASA website gives a slighlty different time
01/24/12 -- Chibis-M deploy (6:19pm) [EST which would be 23:19 UT] see
http://www.nasa.gov/directorates/heo/reports/iss_reports/2012/01202012.html
73 Trevor M5AKA
--- On Sat, 21/1/12, Trevor . <m5aka@xxxxx.xx.xx> wrote:
> RS-39 (Chibis-M) info http://www.uk.amsat.org/3910
> The Morse Code telemetry format is at
> http://tinyurl.com/RS-39-Morse-Code-Telemetry
------------------------------
Message: 13
Date: Sat, 21 Jan 2012 11:56:30 -0600
From: K4FEG <K4FEG@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Thanks for all the personal Emails!
Message-ID: <4F1AFC4E.70601@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
It is nice to know that I am not alone in my way of thinking.
While we all want to encourage new people to come into the ranks of
Amateur radio, we most of all want the to do it successfully and to
enjoy their experiences.
I will offer one last Southern Folk Wisdom on the subject with regards
as to what is essential for a successful and pleasant satellite
operation, YOU NEED A PREAMP! IF YOU CAN'T HEAR YOURSELF ON THE
SATELLITE YOU ARE PROBABLY CAUSING QRM!
Now for the Southern Folk Wisdom: /"Even a blind hog finds a hickory nut
every once in a while....."/ In other words, you may occasionally hear
the satellite under ideal conditions WITHOUT a preamp, but WITH a preamp
you will have a much more pleasant experience on the satellite and so
will all the others that are on that pass with you!
Yah'll all have a nice day! I have a schedule on FO29 with Ireland! I
will be using a preamp!
73's
Frank
K4FEG
------------------------------
Message: 14
Date: Sat, 21 Jan 2012 10:36:49 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Thanks for all the ...
Message-ID: <443D81FE-E892-47A0-8632-9DFAEDB9F482@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
>> ... >> ... what is essential for a successful and pleasant satellite
operation, YOU NEED A PREAMP!
One thing that I have shown to about a hundred audiences LIVE as I work
passes in front of them is there is absolutely NO NEED to spend money on
pre-amp to successfully work the FM LEOs. AO-27 and SO-50 are received
wonderfully with just improved antennas on handheld radios/scanners.
If you cannot hear '27 and '50 and the ISS - nor worked '51 and heard
ARISSat-1 when they were available - with just a "better" antenna
(suggestions on the ANTENNAS page at work-sat.com), then something is wrong
with your setup.
Might a pre-amp be on one's list as a future purchase to work other birds?
Quite possibly.
Clint Bradford, K6LCS
http://www.work-sat.com
>> ... what is essential for a successful and pleasant satellite operation,
YOU NEED A PREAMP!
------------------------------
Message: 15
Date: Sat, 21 Jan 2012 13:52:12 -0500
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Yaesu 847 for sale
Message-ID: <01c401ccd86d$ce2ea4e0$6a8beea0$@xxx>
Content-Type: text/plain; charset="us-ascii"
I would like to offer my Yaesu FT-847 for sale. I purchased this radio new
in 1998. It is an early model but does accept computer control. I waited
till the com port issues were resolved before I purchased mine. It has been
back to Yaesu maybe once for an alignment, no problems I just thought it
would be a good idea. I'm not having any problems with it, but have replaced
it with an Icom C-9100 and just don't use it anymore.. Here is what you will
get.
1 one owner FT-847 in nice condition.
1 FC-20 HF/6M antenna tuner
1 YF-112S-02 SSB filter
1 Symek TNC3S
1 hand mic
1 Yaesu MD-100 desk mic
Original Manual, and box for the 847. Various cables to hook it all
together. The 847 has the Symek 64k baud wide front end mod. This doesn't
affect the normal performance as it is a just an isolated tap off of the RX
front end that has its own wide receiver. It allows you to receive 38k4 baud
packet.
I'm asking $1000.00 for the entire package shipped insured CONUS. Outside
the CONUS I will calculate actual shipping costs, minus estimated CONUS.
Also I will donate 10% of the net profit from the sale and apply to the
AMSAT program of the purchasers choice....
73 Jeff kb2m
------------------------------
Message: 16
Date: Sat, 21 Jan 2012 10:52:30 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Working VO-52 with an FT-817ND and TH-F6A
Message-ID:
<1327171950.96416.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I worke up early this morning and set up my portable satellite
station in the back yard to work VO-52. Since I have written
about working the non-FM satellites with two radios, I decided
to make a couple of videos showing me working VO-52 on the 1511
UTC pass this morning and a closer look at the equipment I used
on that pass. On this pass, I used a Yaesu FT-817ND as my
transmitter, a Kenwood TH-F6A as the receiver (it has an all-mode
receiver), and my Elk Antennas handheld 2m/70cm log periodic for
the antenna.
The video of me working the pass is at:
http://www.youtube.com/watch?v=gpLw3stcxWY
and the close-up view of my station is at:
http://www.youtube.com/watch?v=4Og1P2fjmTs
I have used this FT-817ND/TH-F6A combination at a few hamfests,
and for many of the passes I worked in Australia a few months
ago. I now have three radios that can serve as the downlink
receiver when working SSB/CW via satellite - my second FT-817ND,
an Icom IC-R20 handheld all-mode receiver, and the TH-F6A HT.
The TH-F6A is not capable of being controlled by software like
SatPC32. The other two radios I use for receiving SSB/CW downlinks
can be controlled by software. All of these radios are portable,
and can be used almost anywhere I can hear the satellite downlinks.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 17
Date: Sat, 21 Jan 2012 20:12:46 +0100
From: Andre <sats@xxxxxx.xxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Thanks for all the ...
Message-ID: <4F1B0E2E.9040009@xxxxxx.xxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Op 21-1-2012 19:36, Clint Bradford schreef:
>>> ...>> ... what is essential for a successful and pleasant satellite
operation, YOU NEED A PREAMP!
> One thing that I have shown to about a hundred audiences LIVE as I work
passes in front of them is there is absolutely NO NEED to spend money on
pre-amp to successfully work the FM LEOs. AO-27 and SO-50 are received
wonderfully with just improved antennas on handheld radios/scanners.
>
> If you cannot hear '27 and '50 and the ISS - nor worked '51 and heard
ARISSat-1 when they were available - with just a "better" antenna
(suggestions on the ANTENNAS page at work-sat.com), then something is wrong
with your setup.
>
> Might a pre-amp be on one's list as a future purchase to work other birds?
Quite possibly.
>
Good point, a preamp is to cancel out the cable losses, anymore and you
are just boosting the background noise and not improving the reception.
So if your cable is very short there is not point in using a preamp.
I even dare to say that you can have more succes using a portable setup
then a fixed instalation with preamps and elevation rotors because you
can adjust polarisation, theoreticly this can give a gain upto 30 dB, in
practice somewhere between 3 and 9 dB.
73 Andre PE1RDW
------------------------------
_______________________________________________
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!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 7, Issue 37
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