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CX2SA > SATDIG 28.05.12 21:04l 299 Lines 8385 Bytes #999 (0) @ WW
BID : AMSATBB7168
Read: GUEST
Subj: AMSAT-BB-digest V7 168
Path: IZ3LSV<IW0QNL<JH4XSY<JE7YGF<N9PMO<CX2SA
Sent: 120528/1902Z @:CX2SA.SAL.URY.SA #:60735 [Salto] FBB7.00e $:AMSATBB7168
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Masat-1 (Timothy Stranex)
2. expections (Alan Beck)
3. PWsat and Almasat (Andrew Glasbrenner)
4. Re: expections (i8cvs)
5. Program for possible use in Education and for Demos (Thomas Doyle)
6. Re: expections (Bill Ress)
----------------------------------------------------------------------
Message: 1
Date: Sun, 27 May 2012 23:42:53 +0200
From: Timothy Stranex <tstranex@xxxxxxxx.xxx>
To: David Hopkins <davhop@xxxxxxx.xxx.xx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Masat-1
Message-ID:
<CABtiSaVmLb0t+zdhgHcsaq4Gc0mPFqWueo4TgPCb0q8KEKwG0A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi David
I also heard nothing but silence during its pass this afternoon. However, I
was also testing a new antenna at the time so I can't confirm with full
confidence.
Timothy
HB9FFH
http://carpcomm.com/ - Carpcomm Space Communication Network
On Sat, May 26, 2012 at 11:24 PM, David Hopkins <davhop@xxxxxxx.xxx.xx>wrote:
> Gentlemen,
> Anyone hearing the Masat-1 satellite?
>
> The pass last night and this morning here has shown no sign of the
> satellite.
>
> Is there a problem with the satellite or is it my setup?
>
> David
>
> David G. Hopkins (VK4ZF)
> CAPALABA QLD
> AUSTRALIA
> 27.32.38S 153.12.03E
> QG62OL
> Skype :- davhop
> ______________________________**_________________
> 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<http://amsat.org/mailman/listinfo
/amsat-bb>
>
------------------------------
Message: 2
Date: Mon, 28 May 2012 08:53:47 -0300
From: Alan Beck <becka@xxxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] expections
Message-ID: <76722782C5BF47E9A4B943E9CDB6837D@xxxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Currently I have my LNBlock downconverter mounted at the antenna.
It is a High Sierra Microwave 432M7.
The antenna is a Uhf Ringo ranger set at the boiiom end of the band.
It is 25 feet up right now.
So, how do I realize more signal level?
Using my FT-950, both preamps on I can hear signals well.
I have about 75 feet of RG-8X coax at the output of the converter to my shack.
The test paper shows 25 DB gain. I expect this has to be on the UHF side.
I am thinking of a "eggbeater style" antenna to start with and then some
hieght for that.
Passes are doing well to the horizon.
Looking forward to feedback.
73,
Alan
------------------------------
Message: 3
Date: Mon, 28 May 2012 08:55:04 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] PWsat and Almasat
Message-ID: <9C70E935-E286-494D-A9D5-2AA880FD688B@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Anyone have any news on how these two sats are doing?
73, Drew KO4MA
Sent from my iPhone
------------------------------
Message: 4
Date: Mon, 28 May 2012 15:44:53 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Alan Beck" <becka@xxxxxxxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: expections
Message-ID: <002601cd3cd8$1049ffe0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Alan,
To answere your question it is necessary to know the following data:
1) Gain in dBi and polarization of your antenna UHF Ringo ranger set.
2) Noise Figure NF in dB and gain in dB of your LNB High Sierra
Microwave 432M7 downconverter.
3) Value in MHz of the IF of your 432M7 downconverter.
Having the above data it is possible to compute if it necessary or not
to put a 70 cm Low Noise preamplifier between the antenna and the
input of downconverter or to use an antenna with greater gain but
rotatable in Azimuth and Elevation.
BTW not rotatable antennas like the "eggbeater style" or your UHF
"Ringo ranger set" have poor performance for LEO satellite operation
if compared with a simple 10 dBi horizontally polarized Yagi antenna
rotatable only in Azimuth and fixed Elevation of 20 degrees as often
recommended for LEO satellites by Bob, WB4APR on AMSAT-BB
73" de
i8CVS Domenico
----- Original Message -----
From: "Alan Beck" <becka@xxxxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, May 28, 2012 1:53 PM
Subject: [amsat-bb] expections
> Currently I have my LNBlock downconverter mounted at the antenna.
>
> It is a High Sierra Microwave 432M7.
>
> The antenna is a Uhf Ringo ranger set at the boiiom end of the band.
>
> It is 25 feet up right now.
>
> So, how do I realize more signal level?
>
> Using my FT-950, both preamps on I can hear signals well.
>
> I have about 75 feet of RG-8X coax at the output of the converter to my
shack.
>
> The test paper shows 25 DB gain. I expect this has to be on the UHF side.
>
> I am thinking of a "eggbeater style" antenna to start with and then some
hieght for that.
>
> Passes are doing well to the horizon.
>
> Looking forward to feedback.
>
> 73,
>
> Alan
> _______________________________________________
> 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: 5
Date: Mon, 28 May 2012 09:49:13 -0500
From: Thomas Doyle <tomdoyle1948@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] Program for possible use in Education and for
Demos
Message-ID:
<CAHnRQR+bWjUP9n1atF_9V2XxoDynM3MaJ0Y9ZoC2SSBvUq_wdw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Looking for a few folks to try out this program that is designed for demos
and education.
If any AMSAT's were left out or want to be excluded let me know.
The video high def and is best viewed full screen.
If you are interested in trying the program let me know.
http://www.youtube.com/watch?v=qWyy8nJFVyc
Have Fun 73 W9KE Tom Doyle
------------------------------
Message: 6
Date: Mon, 28 May 2012 08:00:16 -0700
From: Bill Ress <bill@xxxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: expections
Message-ID: <4FC39300.2090800@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Alan,
It's not clear to me what your problem is since you said you are hearing
signals. Are you not hearing signal with the HSM 432M7?
The High Sierra Microwave 432M7 has a noise figure of less than 1 dB.
Check your data sheet and it should likely be around 0.6 dB. The gain of
25 dB is overall gain. This should be more than adequate to over come
the 75 feet of coax between it and the FT-950 and to set the "system"
noise floor. So you don't need, or want, a LNA ahead of the converter.
You have located the downconverter at the best spot, right at the
antenna, but you didn't mention how you were getting power up the 75
feet of coax to the converter.
Regards...Bill - N6GHz
High Sierra Microwave
www.hsmicrowave.com
On 5/28/2012 4:53 AM, Alan Beck wrote:
> Currently I have my LNBlock downconverter mounted at the antenna.
>
> It is a High Sierra Microwave 432M7.
>
> The antenna is a Uhf Ringo ranger set at the boiiom end of the band.
>
> It is 25 feet up right now.
>
> So, how do I realize more signal level?
>
> Using my FT-950, both preamps on I can hear signals well.
>
> I have about 75 feet of RG-8X coax at the output of the converter to my
shack.
>
> The test paper shows 25 DB gain. I expect this has to be on the UHF side.
>
> I am thinking of a "eggbeater style" antenna to start with and then some
hieght for that.
>
> Passes are doing well to the horizon.
>
> Looking forward to feedback.
>
> 73,
>
> Alan
> _______________________________________________
> 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
>
>
--
Regards...Bill Ress
High Sierra Microwave
------------------------------
_______________________________________________
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 168
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