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CX2SA > SATDIG 29.11.08 01:03l 772 Lines 25424 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: SO-50 eludes me (Gordon JC Pearce MM3YEQ)
2. Birds Never Worked (John Marranca, Jr)
3. Re: MMIC for LEO preamp? (i8cvs)
4. SO 50 (Jim Danehy)
5. Re: SO-50 eludes me (Alan P. Biddle)
6. Re: SO-50 eludes me (Bill Dzurilla)
7. Re: SO-50 eludes me (n3tl@xxxxxxxxx.xxxx
8. Re: SO 50 (Bryan Green)
9. Re: AO-51 reload (Bryan Green)
10. Fw: Re: LVB tracker ( Dirgantara R YF0EEE)
11. Determining orbit number (Bryan Green)
12. Re: Determining orbit number (Nigel Gunn G8IFF/W8IFF)
13. Mode S thru roof? (Peter Sils)
14. Re: How to Say Thanks? (Clint Bradford)
15. Re: Mode S thru roof? (Art McBride)
----------------------------------------------------------------------
Message: 1
Date: Fri, 28 Nov 2008 09:01:21 +0000
From: Gordon JC Pearce MM3YEQ <gordonjcp@xxxx.xxx>
Subject: [amsat-bb] Re: SO-50 eludes me
To: amsat-bb@xxxxx.xxx
Message-ID: <492FB361.2070401@xxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
francesco messineo wrote:
> Hello
>
>
> On 11/28/08, Mark Lunday, WD4ELG <mlunday@xx.xx.xxx> wrote:
>> I have worked every bird several times: AO7, AO16, AO27, AO51, FO29, VO52.
>
> same here, plus FO-20, UO-14 and maybe some other I don't remember now...
>
>> But I have never worked SO50. Tonight I had a pass DIRECTLY overhead. I
>> tried the standard initiation call with 74.4 CTCSS, and then calling with
67
>> Hz. Never heard a thing. In fact, I don't think I have ever heard SO50.
>
> are you working full duplex? I always found SO-50 very easy to work
> (well at least to hear myself back), the 74.4 tone must be sent for
> one or two seconds continuously then switch to 67 Hz tone. I work with
I programmed up two channels on my TH-F7E with "SO-50 74" and "SO-50 67"
and the same carrier frequency, so I can TX with the "wake the bird up"
tone then switch to 67 for actual QSOs. Other radios will probably have
this facility.
> handeld homemade dual V/U yagi usually and I noticed that this bird is
> particularly sensitive to polarization, so I need to rotate often the
> yagi to find the best signal. I didn't try recently anyway, beeing on
> other bands :-)
I have pretty much the same setup - homebrew WA5VJB "Cheap Yagi" design,
5 ele 70cm and 3 ele 2m on the same boom with a HB9ABX diplexer. Even
if the polarisation is fairly badly off you should hear *something*.
>> I triple-checked the Doppler, turned down the squelch, turned up the RF
>> gain. Not a peep. Even with only my Arrow yagi fixed at 30 degrees EL, I
>> should have heard something. All I heard was the rush of static. I know
>> this bird is lower orbit and smaller power out, but I should hear
something,
>> right?
>
> if nothing is wrong with the bird yes, you should at least hear
> yourself. Activity was low even in Europe on this bird.
>
What I found when I was getting started with finding satellites and
working them was it takes a bit of time to "get it", and then it's
fairly easy. Trying to point the antenna the right way, tune to the
right frequency as you chase the downlink down the band, and talk into
the radio is all a bit much at first. It's a bit like gliding, when
everyone else is getting thermals *except you* - and then you feel the
little bump as the wingtip starts to roll out of a thermal, so you roll
back against it and you're going up! There's a sudden "ding!" moment
where it all falls into place.
Keep trying, it's there.
Gordon
------------------------------
Message: 2
Date: Fri, 28 Nov 2008 06:16:11 -0500
From: "John Marranca, Jr" <KB2HSH@xxxxx.xxx>
Subject: [amsat-bb] Birds Never Worked
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<8edcdb130811280316p195e91e3o202595baceaecf9f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
WD4ELG said:
"I have worked every bird several times: AO7, AO16, AO27, AO51, FO29, VO52."
I've never been able to get anywhere with GO-32. THAT satellite is the "one
that got away" for me. I have had passes that were near vertical to
me...and I've never done it.
John KB2HSH
--
_______________________________
John Marranca, Jr
PBX Technician/Shop Steward CWA Local 1122
BN Systems, Inc
Orchard Park, NY
(716)972-2006
------------------------------
Message: 3
Date: Fri, 28 Nov 2008 11:21:13 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: MMIC for LEO preamp?
To: <adkins92rod@xxxxxxxxx.xxx>, "Curt Nixon" <cptcurt@xxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <000e01c95143$0b5ef140$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Rod Adkins" <adkins92rod@xxxxxxxxx.xxx>
To: "Curt Nixon" <cptcurt@xxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, November 26, 2008 4:45 PM
Subject: [amsat-bb] Re: MMIC for LEO preamp?
> I have built a number of DEM pre-amp kits
Hi Rod, WI6M
For many years beginning 1970 I have been buiding many low noise
preamplifiers from 2 meters to 23 cm tuning it for the lovest Noise Figure
using a very simple noise generator with a semiconductor diode IN21 of
the type depicted in the schematic diagram Fig-8 of the folloving paper.
http://users.tpg.com.au/users/ldbutler/AmpNoise.htm
> I am fortunate enough to have the loan of a Noise measuring set
Back in 1990 I have duplicated the Precision Automatic Noise Figure Meter
PANFI described by DJ9BV in DUBUS magazine 2/90 and 3/90 good up
to 10 GHz and I am very happy with it
> - & have found that the tuning for lowest noise & highest gain are often
> WAY apart.
I agree with you but using the above simple diode noise generator as
depicted in Fig-8 it is possible to manually adjusts a preamplifier for the
lovest Noise Figure even if at the end of the adjustement you don't know the
value of it in dB because the noise generator is not calibrated
The procedure to be used is a little bit tedious but at the end of the job
you will get the lovest possible Noise Figure obtainable from the
preamplifier under test.
1) Connect the noise source in front of your preamplifier or converter
2) Connect the output of your preamplifier to receiver or converter input
3) Switch OFF the AGC of you receiver and select mode SSB or CW
Note: In modern VHF/UHF receivers it is probably impossible to switch
OFF the AGC but it is possible to connect the preamplifier in
front of a downconverter with a 28 MHz IF output and then go to
any old HF receiver normally using the AGC ON/OFF switching
facility.
4) Adjust the receiver audio control to maximum
5) Adjust the receiver RF gain to minimum
6) Connect an analog AC voltmeter to the audio output of your receiver
preferably the high impedance jack for the headphone in order to get
a high AC voltage and if impossible interpose a small step up
transformer between the regular loudspeaker jack and the AC voltmeter
7) Switch ON the noise source and increase the RF control in order
to get a confortable reading of the noise level on the AC voltmeter
for example in the order of 5 volt AC and take note of it
6) Without moving the setting of the RF control switch OFF the noise
source and take note of the lover voltage level for example 3 volt AC
7)Without moving the audio and RF setting of the receiver start to play
tuning and adjusting everything is possible in your preamplifier i.e.
capacitors and inductances of the input network as well potentiometers
to set the active device current until switching the noise source ON and
OFF the maximum variation on the AC voltmeter is reached and this
condition correspond to the lovest possible Noise Figure obtainable
> My input would be - if you have no way to measure noise performance, buy
> the ready-built preamp - I have also gone this route, & been very
> satisfied (usual disclaimer)
> Rod Adkins WI6M nr San Diego
> 17917 Lyons Valley Road
> Jamul, CA 91935
>
My advise is to build the above noise sorce in Fig-8 and start to play with
it with the only precaution to replace the 50 ohm output resistor with
four 200 ohm resistors in parallel directly soldered like a star to the N
or BNC output connector using the shorter possible wires.
Using 1/4 watt carbon resistors from Allen Bradley helps to reduce
the associated inductance of resistor in order to get the output impedance
of the noise source as close as possible to 50+/-j0 ohm
Wenever is possible use a 6 dB or more fixed attenuator between the
noise source and the preamplifier input because the input impedance
of a preamplifier particularly GaAsFET when adjusted for the lovest NF is
WAY apart from 50 ohm so that the input VSWR is very high and a
50 ohm attenuator in between helps for many reasons.
Do not solder the cartridge of a diode type IN21 but use instead two
small copper spring like a fuse to old it in place.
I hope this helps the beginners to save money buying already made
commercial preamplifiers or of coarse to repair it and tuning it for
the lovest possible NF using the Ham ingenuity and a very inexpencive
noise source all considering that the rest is needed is a receiver
and a AC voltmetyer and they are already available in any Ham shak
73" de
i8CVS Domenico
------------------------------
Message: 4
Date: Fri, 28 Nov 2008 07:01:30 -0500
From: "Jim Danehy" <jdanehy@xxxxx.xx.xxx>
Subject: [amsat-bb] SO 50
To: <amsat-bb@xxxxx.xxx>
Message-ID: <1D97BC7652954B67B507665BEEF8F116@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
from day 1 I have enjoyed SO 50 . . . . never a problem for me . . . a few
locals here in my area complain about it being a difficult bird . . . . for
me it is good from horizon to horizon . . . while not populated like AO 51
(thank you) it has good use from my perspective . . . I use an Icom 910H and I
always switch on the AFC which locks in on the received signal and tracks it .
. . so if there is a slightly different frequency from the one that has been
announced I would never know it . . .
------------------------------
Message: 5
Date: Fri, 28 Nov 2008 06:02:17 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: SO-50 eludes me
To: "'amsat-bb'" <amsat-bb@xxxxx.xxx>
Message-ID: <7ECABD46188D4649B8D314BAD26342DF@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
John,
Yes, SO-50 is noticeably off the nominal published values. About 4 KHz low.
Alan
WA4SCA
------------------------------
Message: 6
Date: Fri, 28 Nov 2008 05:38:13 -0800 (PST)
From: Bill Dzurilla <billdz.geo@xxxxx.xxx>
Subject: [amsat-bb] Re: SO-50 eludes me
To: amsat-bb@xxxxx.xxx
Message-ID: <619754.87136.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Unless you are working full duplex and you can hear your own downlink, you
will not hear a peep on SO-50 unless someone answers you. This is because,
unlike the other FM birds, SO-50 does not transmit a carrier unless something
is being transmitted. I assume this is done to save battery power. Try a
weekend afternoon pass, when there usually are at least a couple of stations
on.
I do not know for the life of me why they require the 74.4 hz tone to turn on
the transpoder. They could use the normal 67 hz tone for triggering. I'm
sure this is one reason why this bird is underused. Do we have any contacts
with the support team to suggest a change?
This sat is not as strong as AO-51 but I've worked it many times with just an
HT and an Arrow antenna. But it can be frustrating without full duplex. You
send the 74.4 hz burst and, since you don't hear a carrier, you don't know if
you have failed to turn on the transponder or if you have and just no one else
is around.
I wish something could be done to increase activity on SO-50.
73,
Bill NZ5N
*********************************
> I have worked every bird several times: AO7, AO16, AO27, AO51, FO29, VO52.
>
> But I have never worked SO50. Tonight I had a pass DIRECTLY overhead. I
> tried the standard initiation call with 74.4 CTCSS, and then calling with 67
> Hz. Never heard a thing. In fact, I don't think I have ever heard SO50.
>
> I triple-checked the Doppler, turned down the squelch, turned up the RF
> gain. Not a peep. Even with only my Arrow yagi fixed at 30 degrees EL, I
> should have heard something. All I heard was the rush of static. I know
> this bird is lower orbit and smaller power out, but I should hear something,
> right?
>
------------------------------
Message: 7
Date: Fri, 28 Nov 2008 13:39:30 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: SO-50 eludes me
To: "Mark Lunday, WD4ELG" <mlunday@xx.xx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<112820081339.26966.492FF491000E1F560000695622230703629B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Mark,
If you're referring to the 5:45-ish UTC pass early this morning (local time),
I heard you just fine and actually called you 2-3 times. I was experimenting
with a different whip antenna on my HT, and heard you (and SO-50) quite well.
I'm sorry we didn't get to make a contact.
I read other responses in the thread before writing my own, and I agree with
W9VNE's comments about it - even though all the tracking I do here is manual.
I find SO-50 to be the most challenging of the FM satellites because of its
nominal configuration. It transmits a quarter-watt into a 0-gain quarter-wave
antenna mounted on one corner of the satellite. It is a fun satellite to work,
and it generally is not nearly as crowded as other satellites, for whatever
the reason.
73 to all,
Tim - N3TL
AMSAT Member No. 36820
QRP-ARCI Member No. 5547
ARRL Member No. 7027180
Athens, Ga. - EM84ha
-------------- Original message from "Mark Lunday, WD4ELG"
<mlunday@xx.xx.xxx>: --------------
> I have worked every bird several times: AO7, AO16, AO27, AO51, FO29, VO52.
>
> But I have never worked SO50. Tonight I had a pass DIRECTLY overhead. I
> tried the standard initiation call with 74.4 CTCSS, and then calling with 67
> Hz. Never heard a thing. In fact, I don't think I have ever heard SO50.
>
> I triple-checked the Doppler, turned down the squelch, turned up the RF
> gain. Not a peep. Even with only my Arrow yagi fixed at 30 degrees EL, I
> should have heard something. All I heard was the rush of static. I know
> this bird is lower orbit and smaller power out, but I should hear something,
> right?
>
> Mark Lunday
> WD4ELG
> wd4elg@xxxx.xxx
> http://wd4elg.net
>
>
> _______________________________________________
> 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: Fri, 28 Nov 2008 07:03:26 -0800
From: Bryan Green <bag@xxx.xxx>
Subject: [amsat-bb] Re: SO 50
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <658E2D6D-55B6-4521-8684-8FAC63AAFF3E@xxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On Nov 28, 2008, at 4:01 AM, Jim Danehy wrote:
> from day 1 I have enjoyed SO 50 . . . . never a problem for me . . .
That was my experience as well: SO-50 was easy to hear... until
lately. For some reason, and I chalk it up to beginner's luck
(perhaps), it is now sometimes more difficult to hear and often
requires careful attention to antenna polarization. If I didn't know
better I would say it was slowly spinning.
But, it is possible to work -- last night I spoke with KC0TOH on SO-50.
Keep trying!
-- bag, KL7CN/W6 CM98fn
------------------------------
Message: 9
Date: Fri, 28 Nov 2008 07:06:13 -0800
From: Bryan Green <bag@xxx.xxx>
Subject: [amsat-bb] Re: AO-51 reload
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <6F961971-03A1-427E-B43F-D193B1AB4C6F@xxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On Nov 26, 2008, at 4:38 PM, Andrew Glasbrenner wrote:
> It looks like we'll be reloading AO-51 for Thanksgiving. Gould
> started the
> process this evening, and I expected it'll be Saturday or later
> before it's
> back open for general use.
..and AO-51 was online and working (although with some irritating QRM,
it seems) this morning on the 1439Z pass.
-- bag, KL7CN/W6 CM98fn
------------------------------
Message: 10
Date: Fri, 28 Nov 2008 22:07:41 +0700
From: " Dirgantara R YF0EEE" <enggi1401@xxxxx.xxx>
Subject: [amsat-bb] Fw: Re: LVB tracker
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <004901c9516b$177824b0$36c4517c@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: <i6kzr@xxxxx.xx>
To: "Dirgantara R YF0EEE" <enggi1401@xxxxx.xxx>
Sent: Friday, November 28, 2008 4:56 PM
Subject: Re: [amsat-bb] Re: LVB tracker
> Hi Mike,
> Which program are you using with LVB tracker?
>
> I at the moment use Predict for Linux.
>
> Thanks, I6KZR Renzo
>
>
> ----- Original Message -----
> From: " Dirgantara R YF0EEE" <enggi1401@xxxxx.xxx>
> To: <k9qho6762@xxxxxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
> Sent: Friday, November 28, 2008 9:09 AM
> Subject: [amsat-bb] Re: LVB tracker
>
>
> > hi Mike
> >
> >
> > thanks for the response, I want to try LVB tracker, just for now i have
> > KR-400 and KOPEAK rotator
> >
> > 73 de YF0EEE
> >
> > ----- Original Message -----
> > From: "WILLIAMS MICHAEL" <k9qho6762@xxxxxxxxx.xxx>
> > To: <amsat-bb@xxxxx.xxx>
> > Sent: Friday, November 28, 2008 9:16 AM
> > Subject: [amsat-bb] Re: LVB tracker
> >
> >
> > Sir:
> >
> > I modified an old Wilson WR-500 rotor (azimuth) to work with the LVB
> > tracker.
> >
> > I believe any rotor could be homebrewed to work.
> >
> > GL
> >
> > Mike (K9QHO)
> >
> > AMSAT 33589
> >
> > Message: 5
> > Date: Thu, 27 Nov 2008 14:25:51 +0700
> > From: " Dirgantara R YF0EEE" <enggi1401@xxxxx.xxx>
> > Subject: [amsat-bb] LVB tracker
> > To: <amsat-bb@xxxxx.xxx>
> > Message-ID: <00c601c95061$69f34450$1c3d3a72@xxxxxxxx>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi everyone
> >
> > any body use LVB tracker use KR-500 and KR-400 rotator,
> > how about a performance and accuracy for elevasi and azimuth ?
> >
> >
> > 73 de YF0EEE
> > _______________________________________________
> > 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: 11
Date: Fri, 28 Nov 2008 07:09:09 -0800
From: Bryan Green <bag@xxx.xxx>
Subject: [amsat-bb] Determining orbit number
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <44918F55-A335-49A0-8E5E-027834841662@xxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Greetings, all:
How do you determine the orbit number of a satellite, and what are the
conventions to determining when the orbit number changes?
Thanks in advance for the information.
-- bag KL7CN/W6 CM98fn
------------------------------
Message: 12
Date: Fri, 28 Nov 2008 15:43:12 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Determining orbit number
To: Bryan Green <bag@xxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <49301190.1010001@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The orbit number changes when the satellite crosses the equator travelling in
a South to North direction.
I don't know whether orbits where the satellite is still attached to the
launch vehicle count.
Bryan Green wrote:
> Greetings, all:
>
> How do you determine the orbit number of a satellite, and what are the
> conventions to determining when the orbit number changes?
>
> Thanks in advance for the information.
>
> -- bag KL7CN/W6 CM98fn
> _______________________________________________
> 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
>
--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF W8IFF (have also held KC8NHF, M0NHF, 9H3GN)
1865 El Camino Drive, Xenia, OH 45385-1115, USA 937 825 5032
e-mail nigel@xxxxx.xxx www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
------------------------------
Message: 13
Date: Fri, 28 Nov 2008 10:32:19 -0800 (PST)
From: Peter Sils <du7la@xxxxx.xxx>
Subject: [amsat-bb] Mode S thru roof?
To: amsat-bb@xxxxx.xxx
Message-ID: <337665.12005.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I am finally getting around to mounting some antenna's in the attic and was
wondering if I should set up my ADIC 3731 with corner antenna?
?
The roof does not have any insulation and as far as I can see only?asphalt
type roofing shingles?over ?wood.
?
Any thoughts would be greatly appreciated!
?
Hope everyone had a wonderful Thanksgiving!
?
73 Peter
KD0AA
------------------------------
Message: 14
Date: Fri, 28 Nov 2008 13:48:09 -0500 (EST)
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: How to Say Thanks?
To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Message-ID:
<6864736.1227898089140.JavaMail.root@xxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx
>
Content-Type: text/plain; charset=UTF-8
>>...How does one say "Thanks" to such great volunteers?
Let me count the ways...
-One can sign up for the AMSAT President's Club. Or if you're already there,
bump yourself up to the next level.
-A painless manner to support: Add a simple paragraph to your Will,
bequeathing monies to AMSAT. Martha has the exact wording necessary.
-Volunteer to demo working a bird at a ham meeting. Have little biz cards
available with "links" to AMSAT and other satellite info sites. VistaPrint is
great for this - 500 cards free, just pay postage.
-Look at the AMSAT Area Coordinator list, and ask your nearby AC to come to
your club to speak. We LOVE to speak at clubs. All we usually charge is a cup
of coffee or a doughnut (grin).
-Promote AMSAT whenever you can. Add it to your QSL card. Add AMSAT.ORG to
your signature file, in appropriate forums. ANYthing to promote the name and
this wonderful aspect of our hobby!
-AMSAT clothing (hats, shirts) are available online at the AMSAT-NA store. And
as an AMSAT member, you get a little discount on some of the items. Wear
AMSAT-logo clothing with pride!
Clint Bradford, K6LCS
909-241-7666
--------------------------------------
Clint Bradford, K6LCS / KAF3359
909-241-7666 - cell
------------------------------
Message: 15
Date: Fri, 28 Nov 2008 10:55:07 -0800
From: "Art McBride" <kc6uqh@xxx.xxx>
Subject: [amsat-bb] Re: Mode S thru roof?
To: <du7la@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <802CE8A2B2924FA78D9A005D2CEBA6CE@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Peter,
You will find some attenuation of signal and the noise figure of your LNA
will be close to 290 degrees K. How about a glass skylight if your antenna
needs to be indoors?
Art, KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Peter Sils
Sent: Friday, November 28, 2008 10:32 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Mode S thru roof?
I am finally getting around to mounting some antenna's in the attic and was
wondering if I should set up my ADIC 3731 with corner antenna?
?
The roof does not have any insulation and as far as I can see only?asphalt
type roofing shingles?over ?wood.
?
Any thoughts would be greatly appreciated!
?
Hope everyone had a wonderful Thanksgiving!
?
73 Peter
KD0AA
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End of AMSAT-BB Digest, Vol 3, Issue 617
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