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CX2SA > SATDIG 25.05.20 19:30l 654 Lines 21128 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. RS-44 VU noise from TX (Andy Brian)
2. Re: RS-44 VU noise from TX (Mark L. Hammond)
3. HO-107 (Jeff)
4. Re: HO-107 (Mark L. Hammond)
5. RS-44 VU noise from TX (Stephen DeVience)
6. Re: HO-107 (Mark L. Hammond)
7. Re: RS-44 VU noise from TX (on4cjq@???????.???
8. Re: RS-44 VU noise from TX (Zach Metzinger)
9. Re: RS-44 VU noise from TX (Steve Kristoff)
10. Re: RS-44 VU noise from TX (Mike Diehl)
11. New version of the W1ANT Satellite Tracker apps available
(Heimir Thor Sverrisson)
12. G5400B Problem (Richard Lawn)
13. Mounting Bracket (BeetleJerald Oliver)
14. Tablet for SatPC32 (Bob Hammond)
----------------------------------------------------------------------
Message: 1
Date: Sun, 24 May 2020 11:14:51 +0200
From: Andy Brian <briaandy@?????.???>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] RS-44 VU noise from TX
Message-ID:
<CADMEjK8xWH=DX9584K=jf7AKErb3ZoKdVCo_SNVjgEAkHTPzyw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi
any good suggestion how to reduce noise from VHF TX on receiving on UHF fo
RS44
I'm using two antenna antena 8meters away each other but is hard to hear
anything when TX.
73 Andy
------------------------------
Message: 2
Date: Sun, 24 May 2020 07:44:02 -0400
From: "Mark L. Hammond" <marklhammond@?????.???>
To: Andy Brian <briaandy@?????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Message-ID:
<CAPRXzyqwEko5UcYFewP_aBKBXWtAzPrR9LcY=g-Grc7og6gXSg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello Andy,
The issue is the third harmonic of the 2M uplink being "heard" by a
sensitive receiver setup on 70cm. Here is a link from our old friend
Tony, AA2TX (SK), that is still applicable today.
The idea is to filter! It may take something on the transmit side and the
receive side, depending on your station. Too many variables--but this will
let you begin to work towards reducing the problem.
https://www.amsat.org/a-simple-desense-filter-for-mode-j-satellites/
There are also some nice bandpass filters that can be used, but they are a
good bit more expensive.
73,
Mark N8MH
On Sun, May 24, 2020 at 5:16 AM Andy Brian via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Hi
>
> any good suggestion how to reduce noise from VHF TX on receiving on UHF fo
> RS44
>
> I'm using two antenna antena 8meters away each other but is hard to hear
> anything when TX.
>
> 73 Andy
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 3
Date: Sun, 24 May 2020 09:22:18 -0400
From: Jeff <kb2m@????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] HO-107
Message-ID: <71A52A82-4DD1-44F5-8281-DB1EF0EA3368@????.???>
Content-Type: text/plain; charset=us-ascii
Is anyone getting any telemetry from HO-107 ?
73 Jeff kb2m
Sent from my iPhone
------------------------------
Message: 4
Date: Sun, 24 May 2020 09:43:06 -0400
From: "Mark L. Hammond" <marklhammond@?????.???>
To: Jeff <kb2m@????.???>, Amsat - BBs <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HO-107
Message-ID:
<CAPRXzypaQfkakFixLHgcp4-Oiq717s_yJqPd4_mLWhSawBbUFg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi Jeff,
No, it been quiet. Drew KO4MA mentioned this briefly a couple days ago.
Several days ago the satellite entered into a several day period of full
illumination. It looks like this full sun event may be the first such
period for the bird since its release into its current orbit. Temps were
getting pretty high according to some of the last telemetry heard. It
should be starting to cool down as eclipses have returned and are getting
longer, which should hopefully help. Rest assured the command team is
going to make attempts to try to get it back on the air. If you recall,
it's a satellite built by UW.and we're a payload/partner on the satellite,
so everyone is in uncharted territory here!
In the meantime, we'll appreciate reports of hearing something from it.
73,
Mark N8MH
On Sun, May 24, 2020 at 9:24 AM Jeff via AMSAT-BB <amsat-bb@?????.???>
wrote:
>
> Is anyone getting any telemetry from HO-107 ?
>
> 73 Jeff kb2m
>
> Sent from my iPhone
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 5
Date: Sun, 24 May 2020 10:09:08 -0400
From: Stephen DeVience <sjdevience@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] RS-44 VU noise from TX
Message-ID:
<CAMPfQQBjAB0KAjpMtszguNnHiuD5dDNc5-MRMkOcWYrnU6X=Pw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
It's funny, I tried RS-44 for the first time yesterday and had the exact
same problem. My SDR even picked up the harmonic when the coax connected to
it was 50 ohm terminated, so my duplexer was not providing enough
filtering. The solution will likely be a front-end filter attached directly
to the device.
-Stephen, N8URE
------------------------------
Message: 6
Date: Sun, 24 May 2020 10:42:33 -0400
From: "Mark L. Hammond" <marklhammond@?????.???>
To: Gerald Witalec <jplanner@?????????.???>, Amsat - BBs
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] HO-107
Message-ID:
<CAPRXzyomRXH_uaydt2He_RJxA1U8dG1PYEs-_Djm_C2tt69DiQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello Jerry,
I'm going to copy the -BB on this reply since "my spider senses" tell me
the question may occur to others!
The "live" telemetry is displayed here.
http://www.amsat.org/tlm/health.php?id=6&port=
If you click on a sensor value, it will show a graph of something like the
last 100 values.
You can also use this page to see telemetry from the whole Fox family.
Scroll to the bottom/right of the page for links to the software, etc.
https://www.amsat.org/tlm/leaderboard.php?id=0&db=FOXDB
Now, if you really want to look at some data--you can download FoxTLM and
do a full download of all the data for any of the "Fox and friends" family,
which includes AO-85, -91, -92, -95, and HO-107. It's what we'll be using
for Fox-1E when it's launched, and any of the other future partner payloads
that AMSAT hopes will host the linear transponder (LTM). Tons of
graphing and viewing options....most of us it take a while to get a feel
for all the features in the program, but Chris AC2CZ (and team) has done an
amazing job with the program and the documentation. A very versatile
program. It's what we use to collect live telemetry feed to AMSAT servers
as well.
Give it a shot and see how you make out! WARNING--It may be habit forming!
I started collecting telemetry back with FO-12, And Oscars
16/17/18/19/20/22/23... AO-40...and the list goes on. If you use any of
scoreboard links above, you'll see I've spent a good portion of my hobby
time collecting telemetry...while I certainly enjoy a voice QSO, I've
always enjoyed the challenge of getting an automated system up and running
and collecting telemetry for whomever needed it.
If fact, we just set up a fully automated station at the university where I
work. My wife and I donated all the equipment, and we hope to inspire the
new engineering students in the school I started 4 years ago. The crazy
pandemic was a mixed blessing---few people around so we could get on the
roof (with some co-worker hams) to install it, but there were no students
around to watch, help, or learn! That will come this fall, I hope.
73,
Mark N8MH
On Sun, May 24, 2020 at 10:03 AM Gerald Witalec <jplanner@?????????.???>
wrote:
> Good morning Mark,
> Just curious on what type of program is available for us to view the
> telemetry
> that would show temperature, voltage and so on within a particular
> satellite?
>
> Thanks,
>
> Jerry...W8RQM
>
>
> On Sunday, May 24, 2020, 9:45:06 AM EDT, Mark L. Hammond via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>
> Hi Jeff,
>
> No, it been quiet. Drew KO4MA mentioned this briefly a couple days ago.
> Several days ago the satellite entered into a several day period of full
> illumination. It looks like this full sun event may be the first such
> period for the bird since its release into its current orbit. Temps were
> getting pretty high according to some of the last telemetry heard. It
> should be starting to cool down as eclipses have returned and are getting
> longer, which should hopefully help. Rest assured the command team is
> going to make attempts to try to get it back on the air. If you recall,
> it's a satellite built by UW.and we're a payload/partner on the satellite,
> so everyone is in uncharted territory here!
>
> In the meantime, we'll appreciate reports of hearing something from it.
>
> 73,
> Mark N8MH
>
> On Sun, May 24, 2020 at 9:24 AM Jeff via AMSAT-BB <amsat-bb@?????.???>
> wrote:
>
> >
> > Is anyone getting any telemetry from HO-107 ?
> >
> > 73 Jeff kb2m
> >
> > Sent from my iPhone
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> >
>
>
> --
> Mark L. Hammond [N8MH]
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 7
Date: Sun, 24 May 2020 20:43:27 +0200 (CEST)
From: on4cjq@???????.??
To: Andy Brian <briaandy@?????.???>
Cc: amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Message-ID:
<1647041245.475312887.1590345807957.JavaMail.zimbra@???????.??>
Content-Type: text/plain; charset=utf-8
Hoi,
Instead of putting a diplexer as filter( best is to use 1 per band), if you
have the possibilty to make stuff your own, just 'split' a diplexer by
making an LPF (low pass filter) at the 2m antenne and a HPF ( high pass
filter) at the 70cm antenne. Or find some to buy (MINI CIRCUITS maybe?).
This way you have a filter at both antennas. Mostly a diplexer is used only
on one antenna, while the other diplexer port is closed with a small dummy
load.
Keep in mind the tx-pwr!
Best 73's
Jerry,ON4CJQ
----- Oorspronkelijk bericht -----
Van: "amsat-bb" <amsat-bb@?????.???>
Aan: "amsat-bb" <amsat-bb@?????.???>
Verzonden: Zondag 24 mei 2020 11:14:51
Onderwerp: [amsat-bb] RS-44 VU noise from TX
Hi
any good suggestion how to reduce noise from VHF TX on receiving on UHF fo
RS44
I'm using two antenna antena 8meters away each other but is hard to hear
anything when TX.
73 Andy
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Sun, 24 May 2020 14:24:57 -0500
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Message-ID: <4d7549b3-b411-da33-8e7f-0909538c715e@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 05/24/20 13:43, Jerry via AMSAT-BB wrote:
> Instead of putting a diplexer as filter( best is to use 1 per band), if
you have the possibilty to make stuff your own, just 'split' a diplexer by
making an LPF (low pass filter) at the 2m antenne and a HPF ( high pass
filter) at the 70cm antenne. Or find some to buy (MINI CIRCUITS maybe?).
I have been eyeing the "144 MHz 5 Pole Low Pass Filter for > 0.75 KW
built by DL2FCN" on this page:
http://dg7ybn.de/technical/Filters.htm
There is just enough build detail to try constructing my own. I plan to
test it with the nanoVNA (v1) and also a sweep generator + HP8568 SA.
--- Zach
N0ZGO
------------------------------
Message: 9
Date: Sun, 24 May 2020 15:51:18 -0400
From: "Steve Kristoff" <skristof@???????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Message-ID: <3ad4c97e11cfe816502a7f0ec1b00c67@???????.???>
Content-Type: text/plain; charset=UTF-8
I've considered getting Mini-Circuits high and low pass filters to go
between my handhelds and my Arrow antenna. But the datasheets for the ones
that I looked at only rate the filters at 0.5W. I'd be pushing about 5 W
through them.?
Does anyone here have experience doing that to these filters and can comment
on whether that works or not?
Are there Mini-circuits filters that will handle 5 W comfortably?
Steve AI9IN
?
----- Original Message -----
From: Jerry via AMSAT-BB (amsat-bb@?????.????
Date: 05/24/20 14:45
To: Andy Brian (briaandy@?????.????
Cc: amsat-bb (amsat-bb@?????.????
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Hoi,
Instead of putting a diplexer as filter( best is to use 1 per band), if you
have the possibilty to make stuff your own, just 'split' a diplexer by
making an LPF (low pass filter) at the 2m antenne and a HPF ( high pass
filter) at the 70cm antenne. Or find some to buy (MINI CIRCUITS maybe?).
This way you have a filter at both antennas. Mostly a diplexer is used only
on one antenna, while the other diplexer port is closed with a small dummy
load.
Keep in mind the tx-pwr!
Best 73's
Jerry,ON4CJQ
------------------------------
Message: 10
Date: Sun, 24 May 2020 16:20:53 -0400
From: Mike Diehl <diehl.mike.a@?????.???>
To: Steve Kristoff <skristof@???????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 VU noise from TX
Message-ID: <C9ED0780-419B-42DE-9FEF-B92E4B9ED140@?????.???>
Content-Type: text/plain; charset=utf-8
See the following response I got from them. Highest power I?ve heard being
used on the BLP-200 is 50w.
> Hello Mike,
>
> Our BLP, BHP and BBP series of filters are all designed with lumped LC
components.
> The capacitors typically have a working voltage of 50-100V, so they aren't
a problem with high power.
>
> The inductors are core and wire based, and we consider them to be limited
by when the core saturates.
> For a lowpass filter, this will cause degradation in rejection a high
frequency.
> For a high pass filter, this will cause degradation in passband insertion
loss.
> The 0.5W max power we state is for higher frequency power, or in your
case, the out of band power.
>
> In terms of the survivability of the unit, 0.5W will not cause any
overheating or permanent damage. The limit is there purely for performance
issues.
> In order to save time in testing and qualification, we've identified 0.5W
as a worst case among the filter series and specify as the max power for all
3 series.
>
> If you are seeing good performance in passband and rejection at higher
powers, that is great.
> Just know that some of our filters may be represented better by the 0.5W
max than others.
>
> Regards,
> William Yu
> Mini-Circuits
> Applications Engineer
73,
Mike Diehl
W8LID/VE6LID
> On May 24, 2020, at 15:53, Steve Kristoff via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?
> I've considered getting Mini-Circuits high and low pass filters to go
between my handhelds and my Arrow antenna. But the datasheets for the ones
that I looked at only rate the filters at 0.5W. I'd be pushing about 5 W
through them.
> Does anyone here have experience doing that to these filters and can
comment on whether that works or not?
> Are there Mini-circuits filters that will handle 5 W comfortably?
> Steve AI9IN
>
> ----- Original Message -----
> From: Jerry via AMSAT-BB (amsat-bb@?????.????
> Date: 05/24/20 14:45
> To: Andy Brian (briaandy@?????.????
> Cc: amsat-bb (amsat-bb@?????.????
> Subject: Re: [amsat-bb] RS-44 VU noise from TX
>
> Hoi,
>
> Instead of putting a diplexer as filter( best is to use 1 per band), if
you have the possibilty to make stuff your own, just 'split' a diplexer by
making an LPF (low pass filter) at the 2m antenne and a HPF ( high pass
filter) at the 70cm antenne. Or find some to buy (MINI CIRCUITS maybe?).
> This way you have a filter at both antennas. Mostly a diplexer is used
only on one antenna, while the other diplexer port is closed with a small
dummy load.
> Keep in mind the tx-pwr!
>
> Best 73's
>
> Jerry,ON4CJQ
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 11
Date: Sun, 24 May 2020 15:43:20 -0600
From: Heimir Thor Sverrisson <heimir.sverrisson@?????.???>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] New version of the W1ANT Satellite Tracker apps
available
Message-ID:
<CAGadeg0voU3otwC5dn7hy88fZFSWLYdZC5kdfsm8iAPEyH+h-Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi all,
New versions of the W1ANT Satellite Tracker Android apps are now
available in the Google Play Store.
These new versions address operational improvements suggested by Paul
Philip AC9O. Centrally adding and removing satellites is now also much
more robust.
Big thanks go out to the hundreds of operators that have downloaded
the app and to those that have given me constructive feedback.
The free version app:
https://play.google.com/store/apps/details?id=com.coolprimes.sattrack
The no-ads paid version:
https://play.google.com/store/apps/details?id=com.coolprimes.sattrack.pro
Thanks & 73
/Heimir W1ANT
------------------------------
Message: 12
Date: Sun, 24 May 2020 23:15:58 -0400
From: Richard Lawn <rjlawn@?????.???>
To: Amsat BB <amsat-bb@?????.???>
Subject: [amsat-bb] G5400B Problem
Message-ID:
<CADQmrTEWHO-TCjiweZF-0VK-F7Rs76VQkZ-qFnGfcd1Fnu5G0A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I'm experiencing a problem with an old G5400B. It works fine with a Fox
Delta interface and then all of a sudden it lock up. I can't even move the
AZ rotor manual with the control box. Is there some sort of thermal device
that might need to be replaced?
Rick, W2JAZ
------------------------------
Message: 13
Date: Mon, 25 May 2020 03:28:35 +0000 (UTC)
From: BeetleJerald Oliver <revjwo@???.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Mounting Bracket
Message-ID: <49520242.2858699.1590377315961@????.?????.???>
Content-Type: text/plain; charset=UTF-8
I am looking for a Mobile Mounting Bracket ( MB-66 ) for my Yaesu FT-847.?
Anybody have one they don't need?
Jerry ?? KJ4EU
------------------------------
Message: 14
Date: Mon, 25 May 2020 10:18:51 -0700
From: Bob Hammond <propgrinder@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Tablet for SatPC32
Message-ID:
<CAKoB7Oqt9oCWAm7DpLexgTq+tFd9+gBtDTO9GPcPSr_Qv9mRpQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I'm in the market for a tablet to take roving. I want to use SatPC32 so
that means some version of Windows.
Any suggestions on a Windows tablet?
Bob W7OTJ
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 175
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