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CX2SA > SATDIG 21.01.10 19:17l 996 Lines 29871 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Sats turning 20 (John Marranca, Jr)
2. Re: Sats turning 20 (Mike Rupprecht)
3. Dee NB2F solves puzzle! Re: IC 910H query (Mark L. Hammond)
4. Re: Rob - KD4ZGW mobile in EM40 (George Henry)
5. Re: Rob - KD4ZGW mobile in EM40 (Rick - WA4NVM)
6. Re: Sats turning 20 (Tom Clark, K3IO)
7. 18 el cp yagi (Bob- W7LRD)
8. COMPASS-1 Close Approach (Mike Rupprecht)
9. Re: COMPASS-1 Close Approach (Doug Papay)
10. Re: 18 el cp yagi (MM)
11. Graphical display of states worked or something similar?
(Michael Wolthuis)
12. Hudson Valley Satcom Group Net Tonight Jan 21 at 8PM ON
Echolink N2EYH-L (cotejaune2@xxx.xxxx
13. Landwehr 2m Pre-amp issue (Vince Fiscus, KB7ADL)
14. HF equip--wanted by buy (ANTHONY JAPHA)
15. Re: Landwehr 2m Pre-amp issue (Alan P. Biddle)
16. HO-68 Schedule - 24-31 Jan 2010 (Alan Kung)
----------------------------------------------------------------------
Message: 1
Date: Wed, 20 Jan 2010 15:08:01 -0500
From: "John Marranca, Jr" <KB2HSH@xxxxx.xxx>
Subject: [amsat-bb] Re: Sats turning 20
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<8edcdb131001201208i582db853k23840ffff959364f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I miss AO-16. That was the easiest satellite to work in the fleet, in my
opinion.
Picked up quite a few states for Satellite WAS because of AO-16.
Hurry back, PACSAT!
John KB2HSH
--
_______________________________
John Marranca, Jr
-PBX Technician-
BN Systems, Incorporated
Orchard Park, NY
(716)406-7130
------------------------------
Message: 2
Date: Wed, 20 Jan 2010 21:38:03 +0100
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] Re: Sats turning 20
To: "'John Marranca, Jr'" <KB2HSH@xxxxx.xxx>, "'amsat-bb'"
<amsat-bb@xxxxx.xxx>
Message-ID: <006501ca9a10$7728b070$657a1150$@xx>
Content-Type: text/plain; charset="iso-8859-1"
Yes John, believe me - I miss AO-16 as well .... (Mark knows that ;-)
73, Mike
DK3WN
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Im
Auftrag von John Marranca, Jr
Gesendet: Mittwoch, 20. Januar 2010 21:08
An: amsat-bb
Betreff: [amsat-bb] Re: Sats turning 20
I miss AO-16. That was the easiest satellite to work in the fleet, in my
opinion.
Picked up quite a few states for Satellite WAS because of AO-16.
Hurry back, PACSAT!
John KB2HSH
--
_______________________________
John Marranca, Jr
-PBX Technician-
BN Systems, Incorporated
Orchard Park, NY
(716)406-7130
_______________________________________________
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: 3
Date: Wed, 20 Jan 2010 19:15:10 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Dee NB2F solves puzzle! Re: IC 910H query
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <Y0FG1d0072QjNpn050FGcl@xxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Well Dee, I should have listened to you :)
Got my IC-910H back from Icom (Washington state). It took me over $50 to
find out it was my old power cord to the radio! Heh.
So today when I got the radio back, I tried the old cord, still reduced
output (70W 2M, about 40W 70cm). Hooked up the factory power cable (much
shorter, heavier gauage), and it now meets spec: it puts out the full 100W
(and a bit more!) on 2M and over 70W on 70cm.
The sheet with the radio said they had "touched up allignment [sic]" and
verified it met overall specs. It included a reminder to verify power
supply was in spec during transmit (which it was, as voltage didn't sag a
bit), and mentioned the SWR foldback if SWR is excessive (which my match was
fine). The power cable simply wasn't flowing sufficient current.
Four hours labor, no charge, since the radio was under warranty. Only cost
was my shipping/insurance to them.
Rather than pretend that it didn't happen, I'll try to save somebody else
the same problem and fess up ;)
Live and learn...even from other people's mistakes! Thanks for the sage
advice, Dee! Next time I'll try to listen :)
73,
Mark N8MH
_________________
Re: IC 910H query
------------------------------------------------------------------------------
--
Subject: [amsat-bb] Re: IC 910H query
From: DOMINICK INTERDONATO <morsesat@xxxxxxxxxxxxx>
Date: Fri, 08 Jan 2010 10:09:18 -0500 (EST)
------------------------------------------------------------------------------
--
I agree with all you have suggested, Mark. I too had questions about
power output on the 910. I discovered that the power to the radio was
the culprit. Before you send it away, check and make sure you have #10
cables to the radio and your power supply delivers the correct voltage
and current. Mine does and it meets Specs on VHF and UHF on "both" my
910's.
One I have the 1.2ghz Module in. One I use for demos at field day and
hamfests etc.
Good luck.
73, NB2F
Dee
On Fri, Jan 8, 2010 at 9:18 AM, Mark L. Hammond wrote:
> Hi Louis,
>
> Congratulations on your new IC-910H! I was the very lucky winner of
> a new IC-910H at the AMSAT Symosium, so I have a bit of time on the
> radio now.
>
> I haven't used RigTalk, so I can't comment on that.
>
> Regarding the CIV USB cable--my experience is that you do NOT need to
> check the RTS + 12V option. I bought a cheap USB CIV level converter
> on eBay, and it works perfectly without this option checked. My
> homebrew interface, on the other hand, uses the serial port and
> requires me to check that option, or else it doesn't receive power via
> the serial line and won't work.
>
> You will need to know which serial port number the USB converter is
> using/emulating; there is a setting in SatPC32 where you must tell it
> the comport number where the level converter (USB CIV cable) is
> installed. You can use the Windows Hardware Tab/Device Manager to
> figure that out.
>
> Your addresses are correct for "default", they should work OK. Be
> sure to also set the BAUD rate in both SatPC32 and the radio to match.
> I think 9600 baud is the highest the radio will do. Be sure to read
> the "Hints" sections in the SatPC32 program to figure out an
> appropriate delay setting, too.
>
> Lots of folks using this setup, so you should be able to get lots of
> help as you get it going! SatPC32 is a fantastic program for working
> satellites.
>
> Personal question/note. I am interested in the output power of your
> IC-910H. Mine is rather low on both VHF (75W) and UHF (45W). So, I
> just sent it back to Icom in hopes they can make it meet "advertised
> and published specs" in that regard. Shipping and insurance on that
> radio was over $50! I won't complain since I won the radio :)
>
> 73,
>
> Mark N8MH
>
> On Thu, Jan 7, 2010 at 4:24 PM, Louis House <kd5gm@xxxxxxxxx.xxx>
> wrote:
>> I plan to commission my new IC 910 H on Saturday this week.? I plan
>> to drive the radio with the "RigTalk" and CIV cable from a USB port.
>> Has anyone experienced any negative function from this data control
>> system type??? In setting up the SatPC32 software, the addresses that
>> appeared by default are "$60" (in all four? boxes in? the "Radio Set
>> Screen").? Does this $60 setting work OK??? The read me file is not
>> very clear concerning the selection for "RTS + 12V", does the? IC 910
>> H need this setting? selected to work correctly??? ? ? Any other known
>> problems would also be most helpful.
>> Thanks for listening.
>> Louis, KD5GM
>> CW ;-) The Original Digital
>
Mark L. Hammond [N8MH]
------------------------------
Message: 4
Date: Wed, 20 Jan 2010 18:23:04 -0600
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: Rob - KD4ZGW mobile in EM40
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, "AMSAT BB"
<amsat-bb@xxxxx.xxx>
Message-ID: <D34101FDE8E446D4A58C385CEEF15972@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Are these the predictions on the AO-27 website, or from my son's Java
schedule lister?
The URL from which the Java scheduler downloaded the data files used to
calculate the satellite's state was serving up old files.... I updated the
scheduler to download from the same URL that the links on the AO-27 page
point to, so they should match now. If the times given by the scheduler
(online or Java version) don't match what the bird is doing, then I can only
assume that the data files are wrong, even though supposedly up-to-date.
The updated Java lister is available at
http://sites.google.com/site/ao27satellitescheduler . The updated version
also refreshes every 5 seconds now, instead of every 10.
George, KA3HSW
----- Original Message -----
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Sent: Wednesday, January 20, 2010 10:57 AM
Subject: [amsat-bb] Rob - KD4ZGW mobile in EM40
> Hi all on the BB,
>
> Rob, KD4ZGW asked me to post that he will be working A0-27 this
> afternoon on the 2052utc pass for anyone that needs that grid. (EM40)
> Also, there is a slight chance he may be on the previous pass at 1912utc.
>
> Also, does anyone know who to contact to try to get the ao-27.org
> prediction up to date? The times are very late once again. Thanks
> for any information.
>
> 73,
>
> Rick WA4NVM
------------------------------
Message: 5
Date: Wed, 20 Jan 2010 19:35:20 -0600
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Rob - KD4ZGW mobile in EM40
To: "George Henry" <ka3hsw@xxx.xxx>, "AMSAT BB" <amsat-bb@xxxxx.xxx>
Message-ID: <C814954B0C5E4330A66E16A9163C2436@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Hi George,
The predictions from the AO-27 website are about 7 minutes late. Your
son's program is right on and saved the day! Thanks for the update on the
new version. I will download it tonight.
73 all,
Rick WA4NVM
> Are these the predictions on the AO-27 website, or from my son's Java
> schedule lister?
>
> The URL from which the Java scheduler downloaded the data files used to
> calculate the satellite's state was serving up old files.... I updated
> the scheduler to download from the same URL that the links on the AO-27
> page point to, so they should match now. If the times given by the
> scheduler (online or Java version) don't match what the bird is doing,
> then I can only assume that the data files are wrong, even though
> supposedly up-to-date.
>
> The updated Java lister is available at
> http://sites.google.com/site/ao27satellitescheduler . The updated version
> also refreshes every 5 seconds now, instead of every 10.
>
>
> George, KA3HSW
>
>
>
> ----- Original Message -----
> From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
> To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, January 20, 2010 10:57 AM
> Subject: [amsat-bb] Rob - KD4ZGW mobile in EM40
>
>
>> Hi all on the BB,
>>
>> Rob, KD4ZGW asked me to post that he will be working A0-27 this
>> afternoon on the 2052utc pass for anyone that needs that grid. (EM40)
>> Also, there is a slight chance he may be on the previous pass at 1912utc.
>>
>> Also, does anyone know who to contact to try to get the ao-27.org
>> prediction up to date? The times are very late once again. Thanks
>> for any information.
>>
>> 73,
>>
>> Rick WA4NVM
>
------------------------------
Message: 6
Date: Wed, 20 Jan 2010 23:13:03 -0500
From: "Tom Clark, K3IO" <tom.k3io@xxxxx.xxx>
Subject: [amsat-bb] Re: Sats turning 20
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <4B57D44F.5030408@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Thanks to Mark for remembering the Microsat (AO-16 thru 19) Birthday.
For me personally, this project was really a Personal High Point!
We went from "light bulb turns on" concept to flight in just over 2
years. The concept of building a satellite with 5 stacked trays
interconnected with a standardized bus was really an innovation. All 4
satellites shared 4 (nearly) identical trays (TX, RX, Computer & Power)
and a 5th tray housing each group's unique hardware worked out very
well; the 5th module was dubbed "TSFR" (this space for rent!).
My personal contributions were the receiver modules (with help from
W4PUJ), the AART "glue" board that is in every module (with help from
Bob Stricklin, N5BRG) and the TSFR concept.
Bob McGwier (N4HY) has collected a lot of Microsat photos at
http://n4hy.smugmug.com/AMSAT/Microsat. You can see the hardware and the
team.
Happy 20th Birthday!
73 de Tom, K3IO
------------------------------
Message: 7
Date: Thu, 21 Jan 2010 06:49:13 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] 18 el cp yagi
To: amsat-bb@xxxxx.xxx
Message-ID:
<2052345966.13577141264056553693.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello
I am refurbishing a 18 element CP yagi.? I am not sure of the manufacturer.?
I opened up the relay switching box and found a lot of moisture (Yes I live
near Seattle) in the box.? Lots of yuck and rust, on non stainless steel
hardware..? The 12V connector is a simple phono plug, which should never be
used outside.? Before I reinvent the wheel has anyone been here before??
Replace the phono plug, sealing everything.? In the past I have used a
material called 3M5200, a marine sealant, nasty but almost permanent.?
Suggestions please.
73 Bob W7LRD
Seattle
------------------------------
Message: 8
Date: Thu, 21 Jan 2010 11:07:12 +0100
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] COMPASS-1 Close Approach
To: "'\"iji\(??\)\"'" <ja6pl@xxx.xxxx.xx>, "'Colin Hurst'"
<cjhurst@xxxxxxx.xxx.xx>, "'Tetsurou Satou'" <ja0caw@xxxx.xxx.xx.xx>,
"'Robert Smith'" <dukenuke@xxxx.xxx>, "'Kevin Kunz'" <kev@xxxx.xxx>,
"'Kasei Toshio'" <tkasei@xxxxx.xxx>, "'John Hackett'"
<archie.hackett@xxxxxxx.xxx>, "'Henk Hamoen'" <hamoen@xxx.xx>, "
'Felix K?nig' " <mccormickd324@xxxxxxxxxx.xxx>, "'Bob DeVarney'"
<we1u@xxxxxxxxxxx.xxx>, "'Alan Cresswell'" <alancresswell@xxxx.xx.xx>,
"'Compass1'" <compass1cubesat@xxxxxxxxxx.xxx>, "'Jim Stahl'"
<jimstahl@xxxxxxx.xxx>, <werner_nunweiler@xxxxxxx.xx>,
<doug.papay@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <001801ca9a81$85319bc0$8f94d340$@xx>
Content-Type: text/plain; charset="utf-8"
All,
United States Joint Space Operations Center (JSpOC) has identified predicted
close approach between COMPASS-1 (#32787) and SICH-1 (#23657).
Jan 22 14:27 UTC - predicted distance: 429 m (overall)
Can someone listen to the COMPASS-1 beacon (437.275 MHz CW) after this time,
please?
It?s the first US East-Coast pass on this day. Any reports are very
appreciated.
Thanks in advance!
73, Mike
DK3WN
------------------------------
Message: 9
Date: Thu, 21 Jan 2010 05:29:19 -0500
From: Doug Papay <doug.papay@xxxxx.xxx>
Subject: [amsat-bb] Re: COMPASS-1 Close Approach
To: Mike Rupprecht <mail@xxxxxxxxxxxxxx.xx>
Cc: Henk Hamoen <hamoen@xxx.xx>, Felix K?nig
<mccormickd324@xxxxxxxxxx.xxx>, Compass1
<compass1cubesat@xxxxxxxxxx.xxx>, Bob DeVarney <we1u@xxxxxxxxxxx.xxx>,
werner_nunweiler@xxxxxxx.xxxxxxxxx Kunz <kev@xxxx.xxx>, Tetsurou Satou
<ja0caw@xxxx.xxx.xx.xx>, Jim Stahl <jimstahl@xxxxxxx.xxx>,
amsat-bb@xxxxx.xxxxxxxxx Hackett <archie.hackett@xxxxxxx.xxx>,
"\"iji\(??\)\"" <ja6pl@xxx.xxxx.xx>, Kasei Toshio <tkasei@xxxxx.xxx>
Message-ID:
<bd4c36b71001210229i7b94168crd32d7558efc5ca77@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Mike (& All),
Since I will be at work before the 1427z pass time tomorrow, I will setup my
station to track and record this pass from Michigan and report my findings
as soon as I am able to review.
Thanks for the heads up.
73,
Doug KD8CAO
On Thu, Jan 21, 2010 at 5:07 AM, Mike Rupprecht <mail@xxxxxxxxxxxxxx.xx>wrote:
> All,
>
> United States Joint Space Operations Center (JSpOC) has identified
> predicted close approach between COMPASS-1 (#32787) and SICH-1 (#23657).
>
> Jan 22 14:27 UTC - predicted distance: 429 m (overall)
>
> Can someone listen to the COMPASS-1 beacon (437.275 MHz CW) after this
> time, please?
> It?s the first US East-Coast pass on this day. Any reports are very
> appreciated.
>
> Thanks in advance!
> 73, Mike
> DK3WN
>
>
------------------------------
Message: 10
Date: Thu, 21 Jan 2010 06:34:00 -0800 (PST)
From: MM <ka1rrw@xxxxx.xxx>
Subject: [amsat-bb] Re: 18 el cp yagi
To: amsat-bb@xxxxx.xxxx Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Message-ID: <798189.33477.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi Bob:
Not sure by your description , what type of CP antenna you have.
Here is a link for the common old KLM.
http://download.qrz.ru/pub/hamradio/antenna/klm/KLM-2M-22C.pdf
You have 3 options.
1. Surf the web for info, on how to rebuild the box and water proof it.
2. Surf for tips on how best to rewire the antenna for Fixed Right-Hand-CP.
By removing the switch you maybe able to improve you gain and reduce switch
induced losses.
3. Replace it with a M2, 2MCP22
I use to have the KLM 2m-22CP. I found the switch box unreliable and had
high loss. The Driven elements were hollow aluminum tubes that would fill
with water, Freeze and crack. After a few years I took it down and replaced
it with the 2MCP22. I have had good luck with it and I do not miss the
polarity switch. And I do not have problems with water getting into the
switch or connector junction blocks.
wf1f Miles
> From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
> Subject: [amsat-bb] 18 el cp yagi
> To: amsat-bb@xxxxx.xxx
> Date: Thursday, January 21, 2010, 1:49 AM
>
>
> Hello
>
> I am refurbishing a 18 element CP yagi.? I am not sure of
> the manufacturer.? I opened up the relay switching box and
> found a lot of moisture (Yes I live near Seattle) in the
> box.? Lots of yuck and rust, on non stainless steel
> hardware..? The 12V connector is a simple phono plug, which
> should never be used outside.? Before I reinvent the wheel
> has anyone been here before?? Replace the phono plug,
> sealing everything.? In the past I have used a material
> called 3M5200, a marine sealant, nasty but almost
> permanent.? Suggestions please.
>
>
>
> 73 Bob W7LRD
>
> Seattle
> _______________________________________________
> 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: Thu, 21 Jan 2010 09:44:52 -0500
From: Michael Wolthuis <wolthui3@xxx.xxx>
Subject: [amsat-bb] Graphical display of states worked or something
similar?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <C77DD294.11803%wolthui3@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Been having lots of fun with new rooftop sat antennas. What I would like to
do is attempt to work all states via AO-51, but I am struggling with a good
layout to keep myself motivated.
Does anyone know of a logging program I could display on a flat screen
specific to sats?
Here is my thought:
A google maps overlay that has states and gridsquares on it (does this exist
today as overlays for Google Earth maybe?)
Then Iog my sat contacts on AO-51 into a logging program (LOTW or something
else).
Then it gives me an output overlay for Google so I can see all states and
gridsquares worked.
It would be great if it could color in the states I have worked and/or the
grids I have worked on zoomin.
Well, I know it is a lot to ask and maybe it has to be designed, but it
certainly sounded interesting to me. It would really be nice when scouts or
family come over to show them the states I have worked on AO-51 and/or
others in a visual display.
Thanks for any ideas or any pointers into anything close or at least a good
sat logging program that maybe I can export a file to utilize in Google
Earth to make a KMZ out of or something.
Mike
kb8zgl
------------------------------
Message: 12
Date: Thu, 21 Jan 2010 09:52:11 EST
From: cotejaune2@xxx.xxx
Subject: [amsat-bb] Hudson Valley Satcom Group Net Tonight Jan 21 at
8PM ON Echolink N2EYH-L
To: amsat-bb@xxxxx.xxxx nb2f@xxxxx.xxxx roi@xxxxxxxxx.xxxx
wd9ewk@xxxxx.xxxxxxxxxx@xxxxx.xxxx wb2llp@xxxxxxxxx.xxx
Message-ID: <4e00.4a1e0b48.3889c41b@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hello everyone it is time again for the HVSG Net tonight Thursday, January
at 8PM EST. We can be heard on Echolink N2EYH-L or on the Mt. Beacon ARC
repeater at 146.970 pl 100 on your dial. On our last net we had four Amsat
area
coordinators from coast to coast. We had Pete/wb2oqq from Long Island in NY
and Dee/nb2f in NJ and Patrick/wd9ewk from Arizona and Clint/k6lcs from
California. Wow, what a great group to have together. So if you have any
questions there is plenty of knowledge on the net to answer it. Please join us
tonight and share your satellite expertise with us.
73
Gary/wa2aqh
------------------------------
Message: 13
Date: Thu, 21 Jan 2010 09:27:54 -0700
From: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>
Subject: [amsat-bb] Landwehr 2m Pre-amp issue
To: amsat-bb@xxxxx.xxx
Message-ID: <5.2.1.1.2.20100121085347.00c365a8@xxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I was suspecting my 2m Landwehr was having problems one day, don't know
when it really started having problems, but last night I checked it
out. Last night when I was listening to AO-7, when I turned the pre-amp on
I got about S 7 of noise and the signals from the satellite were buried in
the noise, and I couldn't tell that the signals were boosted much, but I
could still hear them with difficulty through the noise. Turning the
pre-amp off made hearing the signals easier, due to lack of
noise. Obviously since I could still hear stations, RF is still going
through the device. Checking it out on stronger fm signals, did seem to
amplify them more, but I could tell there was still noise.
I don't know much about gaAsFet's but what I guess I'm asking, is when they
Fail, could they fail in the noisy position, or when then they fail do they
die with no amplification? I guess it could be possible some other
component around the gaasfet failed making the device run wild. Maybe
dirty relay contacts? The RF sensor still works still works fine.
I won't be able to get my hands on it for a while as there is too much snow
on the roof yet, and I don't have weak signal noise generators to try to
isolated the problems. Landwehr gives you a schematic but they didn't like
to reveal too much. The pre-amp is about 16 years old. My 70cm Landwehr
which is the same age and gets much more use is chugging away just
fine. The 2m pre-amp is under an eggbeater. I don't need a 2m pre-amp on
LEO's with the beam.
Give me some things to check, Thanks, 73
KB7ADL
------------------------------
Message: 14
Date: Thu, 21 Jan 2010 11:31:37 -0500
From: "ANTHONY JAPHA" <tjjapha@xxxxxxxxx.xxx>
Subject: [amsat-bb] HF equip--wanted by buy
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Message-ID: <380-220101421163137718@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII
Any former or current HF ops have an old Drake MN2700 antenna tuner you'd
like to sell? Must be in good condition.
Tnx and 73,
Tony, N2UN
------------------------------
Message: 15
Date: Thu, 21 Jan 2010 10:36:46 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: Landwehr 2m Pre-amp issue
To: "'Vince Fiscus, KB7ADL'" <vlfiscus@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <7862D3B7D56D4E41A866F5A837FDCF49@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Vince,
One thing to check is the DC feed, especially the ground return. I use a
separate shielded cable, old RG-58 actually, and over the years I have had
the DC ground open up, or become intermittent. Both times, it introduced
significant RF noise. You can use the signal cable for the ground, but in
my case that required a slight rearrangement of the DC grounds.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Vince Fiscus, KB7ADL
Sent: 21 January, 2010 10:28
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Landwehr 2m Pre-amp issue
I was suspecting my 2m Landwehr was having problems one day, don't know
when it really started having problems, but last night I checked it
out. Last night when I was listening to AO-7, when I turned the pre-amp on
I got about S 7 of noise and the signals from the satellite were buried in
the noise, and I couldn't tell that the signals were boosted much, but I
could still hear them with difficulty through the noise. Turning the
pre-amp off made hearing the signals easier, due to lack of
noise. Obviously since I could still hear stations, RF is still going
through the device. Checking it out on stronger fm signals, did seem to
amplify them more, but I could tell there was still noise.
I don't know much about gaAsFet's but what I guess I'm asking, is when they
Fail, could they fail in the noisy position, or when then they fail do they
die with no amplification? I guess it could be possible some other
component around the gaasfet failed making the device run wild. Maybe
dirty relay contacts? The RF sensor still works still works fine.
I won't be able to get my hands on it for a while as there is too much snow
on the roof yet, and I don't have weak signal noise generators to try to
isolated the problems. Landwehr gives you a schematic but they didn't like
to reveal too much. The pre-amp is about 16 years old. My 70cm Landwehr
which is the same age and gets much more use is chugging away just
fine. The 2m pre-amp is under an eggbeater. I don't need a 2m pre-amp on
LEO's with the beam.
Give me some things to check, Thanks, 73
KB7ADL
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Message: 16
Date: Fri, 22 Jan 2010 01:06:29 +0800
From: "Alan Kung" <alankung@xxxxxxx.xxx.xxx.xx>
Subject: [amsat-bb] HO-68 Schedule - 24-31 Jan 2010
To: <amsat-bb@xxxxx.xxx>
Message-ID: <002a01ca9abc$86fb5d70$6c01a8c0@xxxxxxxxxxx>
Content-Type: text/plain; charset="gb2312"
24 Jan. 2010, Linear Transponder
=======================================
16:05...Turn On
India,Middle East Asia, Europe, NA
16:50...Turn Off
23:15...Turn On
South Africa,South America,Europe,
NA,North Pole,North Asia
24:00...Turn Off
25 Jan. 2010, Linear Transponder
=======================================
00:55...Turn On
South Pole, South America,NA,North
Asia,North Pole
01:40...Turn Off
12:08...Turn On
Australia,South Asia,East Asia,North Asia
12:21...Turn Off
19:15...Turn On
South Africa,Europe,NA,North Pole,North Asia
20:00...Turn Off
26 Jan. 2010, Linear Transponder
=======================================
00:40...Turn On
South America,NA,North Asia, North Pole
01:23...Turn Off
02:20...Turn On
South America,NA,North Asia, North Pole
03:05...Turn Off
11:25...Turn On
Australia, New Zealand
11:48...Turn Off
13:41...Turn On
South Asia,East Asia,North Asia
13:56...Turn Off
19:00...Turn On
Africa,Europe,NA,North Pole,North Asia
19:45...Turn Off
27 Jan. 2010, Linear Transponder
=======================================
00:20...Turn On
South Pole,South America, NA
North Asia, North Pole
01:05...Turn Off
02:10...Turn On
South Pole,South America, NA
North Asia, North Pole
02:55...Turn Off
11:15...Turn On
South Pole,Australia, New Zealand,
East Asia,Europe,NA,North Pole
12:00...Turn Off
17:05...Turn On
India,Middle East Asia,Europe,NA,
North Pole
17:50...Turn Off
28 Jan. 2010, Linear Transponder
=======================================
00:05...Turn On
South Pole,South America,NA,North Asia
00:45...Turn Off
01:55...Turn On
South America,NA,North Asia
02:40...Turn Off
11:00...Turn On
Oceania,East Asia,North Asia,Europe
11:45...Turn Off
13:07...Turn On
South Asia,East Asia,North Asia
13:22...Turn Off
20:10...Turn On
Africa,Europe,NA
20:55...Turn Off
29 Jan. 2010, Linear Transponder
=======================================
03:40...Turn On
South America,NA,North Asia,Middle Asia
04:25...Turn Off
10:40...Turn On
Oceania,East Asia,North Asia,Europe
11:25...Turn Off
12:50...Turn On
South Asia,East Asia,North Asia
13:05...Turn Off
13:20...Turn On
Europe,NA,South America,South Pole
14:05...Turn Off
16:30...Turn On
India,Middle East Asia,Europe,NA
17:15...Turn Off
19:55...Turn On
Africa,Europe,NA,North Asia
20:40...Turn Off
30 Jan. 2010, Linear Transponder
=======================================
03:25...Turn On
NA,North Asia
03:48...Turn Off
12:10...Turn On
Oceania
12:30...Turn Off
12:36...Turn On
North Asia,East Asia,South Asia,Oceania
12:51...Turn Off
19:40...Turn On
Africa,Europe,NA,North Asia
20:25...Turn Off
31 Jan. 2010, Linear Transponder
=======================================
01:05...Turn On
South America,NA,North Asia
01:50...Turn Off
02:55...Turn On
South America,NA,North Asia
03:40...Turn Off
12:19...Turn On
South Asia,East Asia, North Asia
12:34...Turn Off
73
Alan Kung, BA1DU
HO-68(XW-1) Project Manager
www.camsat.cn
------------------------------
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End of AMSAT-BB Digest, Vol 5, Issue 38
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