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CX2SA > SATDIG 22.12.18 21:41l 874 Lines 30124 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Fox telemetry software question (Ron VE8RT)
2. Re: Fox telemetry software question (Ron VE8RT)
3. LO-70 Demod Settings (Vincenzo Mone)
4. AMSAT-UK data warehouse(s) (skristof@???????.????
5. Re: Cheap rotator setup (R. Chastain)
6. Re: Fox telemetry software question (JoAnne K9JKM)
7. Re: Fox telemetry software question (Burns Fisher)
8. Re: Fox telemetry software question (Ron VE8RT)
9. Re: Fox telemetry software question (Mac A. Cody)
10. Re: Fox telemetry software question (JoAnne K9JKM)
11. Re: Fox telemetry software question (Zach Metzinger)
----------------------------------------------------------------------
Message: 1
Date: Fri, 21 Dec 2018 22:39:18 -0700
From: Ron VE8RT <ve8rt@?????.??>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <20181221223918.a23977d14c2c23555708dbc7@?????.??>
Content-Type: text/plain; charset=US-ASCII
Thanks JoAnne,
very big help! I have some work yet to do with the new Gpredict
installation too, satellites need to be added.
73 Ron VE8RT
On Fri, 21 Dec 2018 07:47:40 -0600
"JoAnne Maenpaa" <k9jkm@???????.???> wrote:
> Hello Ron,
>
> > It only provides tracking for AO-85, and I read the note on the
> > first pages of the manual about tracking other satellites about
> > the file names.
>
> This page helped me to add Fox-1Cliff AO-95 into FoxTelem:
> http://www.g0kla.com/workbench/2018-11-11.php
>
> --
> 73 de JoAnne K9JKM
> k9jkm@?????.???
>
>
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
--
Ron VE8RT <ve8rt@?????.??>
------------------------------
Message: 2
Date: Fri, 21 Dec 2018 22:45:13 -0700
From: Ron VE8RT <ve8rt@?????.??>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <20181221224513.920ea796915d22a178e76328@?????.??>
Content-Type: text/plain; charset=US-ASCII
Ideally I guess would be a small package with Fox Telem running on
Raspberry Pi like processor, tied to a SDRPlay receiver, on an omni
antenna. I have the components, but little time or skill. So for now
I can manage occasional monitoring using my FT-726R on a manually
pointed 2M quad.
Thanks for the offer of help, I may take you up on it.
73 Ron VE8RT
On Fri, 21 Dec 2018 10:11:28 -0500
Burns Fisher <burns@??????.??> wrote:
> Ron,
>
> DP22 telemetry would be fabulous!! Holler if you need more help getting
> more sats enabled
>
> On Fri, Dec 21, 2018 at 8:47 AM JoAnne Maenpaa <k9jkm@???????.???> wrote:
>
> > Hello Ron,
> >
> > > It only provides tracking for AO-85, and I read the note on the
> > > first pages of the manual about tracking other satellites about
> > > the file names.
> >
> > This page helped me to add Fox-1Cliff AO-95 into FoxTelem:
> > http://www.g0kla.com/workbench/2018-11-11.php
> >
> > --
> > 73 de JoAnne K9JKM
> > k9jkm@?????.???
> >
> >
> > _______________________________________________
> > 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: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
--
Ron VE8RT <ve8rt@?????.??>
------------------------------
Message: 3
Date: Sat, 22 Dec 2018 12:40:00 +0100
From: "Vincenzo Mone" <vimone@?????.??>
To: "Amsat - BBs" <amsat-bb@?????.???>
Subject: [amsat-bb] LO-70 Demod Settings
Message-ID:
<!&!AAAAAAAAAAAYAAAAAAAAALgqrd2N1rRAiaQvRd7pgRDCgAAAEAAAAGfNZ5P5LmJBj4tc6HMTkm
UBAAAAAA==@?????.??>
Content-Type: text/plain; charset="us-ascii"
Hi folks,
I am getting no success to download the Photos from the bird.
I can pass on the bird in voice mode as I can hear my own voice
In the PC speakers from the Funcube Dongle Pro Plus, but if I try sending
The request file to the bird without any CTSS Tone I do not get anything
On the monitor of my PC.I am not quite sure that I have done all the
settings correctly in the
Demod or maybe I need more settings for the Photos way.
Is there somebody so kind to give me an hand in the correct settings maybe
off the mail list?
Any help will be really appreciated
73 de Enzo IK8OZV
EasyLog 5 BetaTester
EasyLog PDA BetaTester
WinBollet BetaTester
D.C.I. CheckPoint Regione Campania
Skype: ik8ozv8520
*********************************
****** GSM +39 328 7110193 ******
***** SMS +39 328 7110193 *****
*********************************
------------------------------
Message: 4
Date: Sat, 22 Dec 2018 08:14:24 -0500
From: skristof@???????.???
To: amsat-bb@?????.???
Subject: [amsat-bb] AMSAT-UK data warehouse(s)
Message-ID: <c16aaf364e38a670be2858e40c2f6697@???????.???>
Content-Type: text/plain; charset=US-ASCII
What is the latest on the updates of the AMSAT-UK data warehouses?
Right now, I have EO-88 and JO-97 going to http://data.amsat-uk.org [1]
and I have AO-73 going to http://data.funcube.org.uk [2] .
Is that correct or should all the data be going to the warehouse I've
listed first?
Steve AI9IN
Links:
------
[1] http://data.amsat-uk.org
[2] http://data.funcude.org.uk
------------------------------
Message: 5
Date: Fri, 21 Dec 2018 23:44:02 +0000 (UTC)
From: "R. Chastain" <suenrod@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Cheap rotator setup
Message-ID: <1593916432.8070838.1545435842914@????.?????.???>
Content-Type: text/plain; charset=UTF-8
http://www.sarcnet.org/projects/project_rotator_MkII.html
Rotator MkII
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Rotator MkII
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On Friday, December 21, 2018, 8:05:04 AM EST, R. Chastain via AMSAT-BB
<amsat-bb@?????.???> wrote:
This AZ/EL rotor looks VERY impressive!! I ordered all the parts but have
not started it yet.
Rotator MkII
|
|
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Rotator MkII
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? ? On Thursday, December 20, 2018, 10:51:41 AM EST, Robert
<robert@?????.???> wrote:?
Jerry,
Those are all such great points that I would like to add, with your
consent, most of your comments to the same page.
When we lived 100 yards from the shore of the Gulf of Mexico in
Clearwater Beach, I often saw the same results with my Elk standing on
my high rise balcony where i could very often operate below the horizon
based on the tracking programs.
Backing up to a forest like I do now v. a straight ocean view has a
major impact on operating sats. You heard it here first. In my case,
Bob's, WB4APR, recommendations are moot since I have an 18' telescoping
mast in a forest of 65' trees meaning even in winter that I need 22
degrees just to hear and work any bird...so I miss from almost all
compass points the ability to follow Bob's excellent advice...and it is
killing me - especially on all points west as shown by my VUCC and WAS
lists...
Thanks, again, for the great comments and suggestions, Jerry!
73,
Robert
?-.- ...-- .-. .-. .-.
73 de Robert K3RRR
http://K3RRR.com
@?????????
http://YouTube.com/K3RRR
-.- ...-- .-. .-. .-.
On 12/20/2018 9:28 AM, k5oe@???.??? wrote:
> Robert,
> Nice piece of work!? Thanks for sharing all of it in such great (and easy
to replicate) detail.? I just wanted to add some comments on (the debate
about) antenna pointing angle for LEOs... based on many (too many?) years of
chasing states, countries, grids, etc.:? it may all depend on your own
particular situation AND goals (i.e., there is no one magic
formula/solution/design for everyone).
>
> The single biggest factor (after getting past HOAs, partner objections,
and fear of heights) is:? can you see the horizon unobstructed by building
and foliage?? If trees are a problem, are they deciduous... so possibly not
an issue in winter?? If you do have blockage, Bob's (WB4APR) recommendation
of pointing the antennas at 15 degrees above the blockage is pragmatic and
well proven.? Read no further.
>
> If, however, you are lucky enough to see the horizon, you might consider
pointing your antennas directly at it.? This gives you maximum gain from the
antenna AND maximum ground gain (you will know it when you hear it,
typically under 5 degrees) when the satellite is the farthest from you,
giving you brief access to the farthest/hardest/most rare states, countries,
and grids.? I can't count the number of rare grids I have snagged at -1 and
-2 degrees (yes, negative, over-the-horizon) just as the downlink faded!?
The null you may/will experience directly overhead is very brief and only on
passes typically above 75 degrees.? Those contacts are the easy ones anyway.
>
> One final word:? if you have worked everyone within near-LEO range and you
ONLY want those at your horizon, orient (regardless of pointing angle) your
antennas at horizontal (flat) to maximize your ground gain potential.? There
is practically no ground gain on vertical polarization, and you lose half if
you orient your antenna at 45 degrees.? You will only hear below-the-horizon
signals with horizontal polarization.
>
> 73,
> Jerry, K5OE
> Satellite WAS/DXCC/VUCC 1,000
>
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Robert
> Sent: Wednesday, December 19, 2018 11:56 PM
> To: amsat-bb@?????.???
> Subject: Re: [amsat-bb] Cheap rotator setup
>
> Hi Eli,
>
> I am the author of that webpage you're using for a guide for your own set
up. I humbly appreciate that you have chosen the page for some guidance -
that page is one of the Top 5 pages at my site so lots of folks have
successfully used it. Several of them have been pushing me to submit this to
QST as an article which I may do (my last one was exactly
> 30 years ago - so it may be time for the next one.)
>
> ::::::::::::::::::::::::
> Note that I extensively edited the web page today so I genuinely am
seeking additional help from all to help make this page even better and to
give it more clarity or correct any technical errors - especially before I
submit the page info to QST....
> ::::::::::::::::::::::::
>
> Eli, as a result of your question, I just added the below info to the web
page - along with a slider that shows 31 new photos that give more details
and a detailed diagram of the antenna's beamwidth....check out the page for
more info since those cannot be shown here...but for those who don't want to
look, here is a highlight quote from the page to hopefully answer Eli's
question.
>
> --------------------------------------
>
> ?Why Are You Using a 45? Angle for Fixed Elevation Instead of the
Recommended 15???
>
> I thought I had better add a comment as to why I am obviously using a 45?
angle instead of the recommended 15?.
>
> I am personally surrounded by RF eating 65 foot trees and a RF eating
two-story house. As a consequence, I chose to move the A430S10 50? antenna
beamwidth (see below) and center them on a fixed 45? instead of 15?.
>
> Ostensibly, I would lose coverage from 0? to 20? (45? center angle minus
half of the 50? beamwidth of the antennas, or 25? =? 20? ) by doing this ?
but I?m going to lose those angles (and then some) anyway because of the
tree and house QRM.
>
> Trust me when I tell you that trees and houses do a damnably good job of
blocking RF at satellite frequencies ? in my case below 30? in summer and
22? in winter! (This is going to be one of my next videos on my YouTube
channel at http://Youtube.com/K3RRR.)
>
> Beamwidth is loosely defined as the width of the main lobe of radiation
for both transmit and receive. This is a whole discussion by itself but for
my cheapie antenna system, you?re better off? with a wide beamwidth versus a
more narrow beamwidth for your antennas. The following diagram from Diamond
Antennas shows the comparison of what that width of the main lobe looks like
with my orange arrows showing where they cross the
> 3 db points.
>
> If you kinda sorta extrapolate, you can see that an imaginary line from
the 3 db intersection point to the outer circle would translate to about 25?
either side of the zero mark ? for a total spread from both sides equal to
about 50? of beamwidth. (The other chart shows the same info for Diamond?s
bigger brother the A430S15 ? 15 elements instead of 10.
> you can see how much narrower the beamwidth is albeit with not that much
difference in gain.)
>
> In more technical terms, the A430S10 has an E-Plane 3 dB Beamwidth = 50
degrees. In layman?s language, this means that you will have a good receive
AND transmit signal 25? above and 25? below your center angle ? which in my
case is 45? due to the constraints of Home Depot.
>
> Home Depot?
>
> I picked 45? because Home Depot sells PVC connectors for that angle ? and
only that angle since 90? angles really are not that useful for the hamsats!
>
> Again, with these antennas having a 50? beamwidth, my setup handled passes
between 20? and 70?. This same wide beamwidth also makes pointing the
antenna more forgiving ? which is important for cheap rotators which are not
all that accurate between calibrations.
>
> (The E-Plane 3 dB Beamwidth = a whopping 95 degrees for the A144S5 two
meter five element Yagi ? so it was not the limiting consideration.)
>
> But enough about me and why I chose 45?. Let?s talk about you and your
need for 15?.
>
> Permanently Bending Schedule 40 PVC With My Wife?s Help
>
> I need to plagiarize myself and steal a couple of paragraphs I have on
this other webpage on my site:
>
> Attic AMSAT Antenna ? Working the Ham Radio Satellites With A Rotatable,
Computer Controlled, Yagi Attic Antenna
>
> ?If you have played with PVC for antennas for a while you will already
know they don?t make 15? connectors. So, I was faced with trying to bend a
straight piece PVC ? which I thought was going to be difficult.
>
> ?As it turns out, it is surprisingly trivial to heat even Schedule 40 PVC
so that it becomes bendable with a standard 1500 watt hair dryer in less
than 10 minutes of your time! (Thanks to YouTube for this education!)?
>
> Wife Jan?s hair dryer actually had some attachments and gizmos which
focused the heat better than mine so I swiped hers for this task. She was
surprisingly unamused and recommended I get a heat gun for future
applications. I obediently followed her recommendation and got this
particular heat gun.
>
> Something about briar patches came to mind for some reason ? even though
there was no mention in the Amazon description.
>
> --------------------------------------
>
> Eli, I have just now added the above information to the cheap antenna page
? I appreciate the heads up on helping make this clearer for other folks too.
>
> Hope this helps...and hope to work you on the birds soon!
>
> 73,
>
> Robert K3RRR
>
>? ? -.- ...-- .-. .-. .-.
> 73 de Robert K3RRR
> http://K3RRR.com
> @?????????
> http://YouTube.com/K3RRR
> -.- ...-- .-. .-. .-.
>
> On 12/17/2018 6:37 PM, Eli Caul wrote:
>> Hi folks -
>>
>> In my ongoing effort to figure out how to use the SSB satellites, I
duplicated this setup over the weekend:
>>
>> http://k3rrr.com/cheap-computer-controlled-tv-rotor-for-amsat-satellit
>> es-and-includes-free-satellite-tracking-with-pstrotator-and-the-usb-ui
>> rt/
>>
>> I bought a list of materials based on the photograph,? and it didn't
occur to me that the PVC parts pictured put the antennas at approximately 45
degrees and not the recommended 15 degrees.
>>
>> Has anyone done this setup?? If so, how did you assemble it so that the
antennas ended up at the recommended angle?
>>
>> There were a couple of higher angle passes yesterday (one was at 50
degrees) but so far I haven't been able to 'loop' the satellite.? I'm using
a Yaesu FT-991A for uplink and an Airspy SDR on the downlink.
>>
>> Advice appreciated.? So far I've gotten some excellent advice from AMSAT
members and I really appreciate the groups level of expertise and patience
with my fundamental questions.
>>
>> 73 de KK6ZHZ,
>>
>> - Eli Caul
>>
>> Director of Customer Care
>> Sonic
>> 707-237-6201 Direct
>> 707-521-0131 Faxline
>>
>>
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
_______________________________________________
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: http://www.amsat.org/mailman/listinfo/amsat-bb
?
_______________________________________________
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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Sat, 22 Dec 2018 08:19:56 -0600
From: "JoAnne K9JKM" <joanne.k9jkm@?????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <5c1e480b.1c69fb81.2ad9b.fa77@??.??????.???>
Content-Type: text/plain; charset="us-ascii"
Good morning Ron,
> Ideally I guess would be a small package with Fox Telem running on
> Raspberry Pi like processor, tied to a SDRPlay receiver, on an omni
> antenna.
A pre-configured SD Card for the Raspberry Pi with the Raspbian operating
system and FoxTelem loaded is available in the AMSAT Store:
https://www.amsat.org/product/fox-in-a-box-raspberry-pi-sd-card/
Just insert the SD card in your Raspberry Pi and FoxTelem starts when you
boot up.
I run the Fox In A Box with an inexpensive $20 RTL-SDR dongle. It works but
I've discovered a better receiver like the SDR Play will give better
results. I'm using the pre-amp that used to be in the AMSAT Store - it was
just laying around anyways. My antenna is a spare 2 meter vertical.
> I have some work yet to do with the new Gpredict
> installation too, satellites need to be added.
GPredict will add satellites for you ...
>From the main screen select 'Edit --> Preferences'
Then from that 'GPredict Preferences :: General' screen select the 'TLE
Update' tab
The TLE sources default to Celestrak, etc. I changed my TLE source to AMSAT:
Make the TLE source http://www.amsat.org/amsat/ftp/keps/current/nasabare.txt
on some GPredict versions you make the source:
http://www.amsat.org/amsat/ftp/keps/current/ and then make the file to
retrieve nasabare.txt
Check the option for 'Add new satellites to local database' box. You'll get
all of the recent satellites and every time a new satellite is added to the
Keps it will be added at your QTH when you update the Keps. Pick the new
satellite from the configuration view.
--
73 de JoAnne K9JKM
k9jkm@?????.???
------------------------------
Message: 7
Date: Sat, 22 Dec 2018 09:59:26 -0500
From: Burns Fisher <burns@??????.??>
To: JoAnne K9JKM <joanne.k9jkm@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID:
<CABX7KxWEt-_3rQKjTiAqnyt8Ly3Lkc2Fvr8bWQvuOqY--pNTCA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I was going to say nearly the same thing as JoAnn, but let me add a bit
Raspberry Pi info by pointing you to
http://burnsfisher.com/AMSAT/FoxInABox/ This
includes the documents that go with the "Fox-in-a-Box" SD card in the store
as well as a readme.txt file to help. Notice that you can also download
the SD card image for free although it is quite large! Also note that
"parts list" includes an inexpensive 2-band J-pole (Fox-1E will have a UHF
downlink) and an inexpensive phantom-power preamp that can be powered by a
FunCubeDongle or RTL-SDR (I think). I don't know anything about SDR-play
but if that works too, great!
Good luck and thanks in advance for any telemetry you send!
>
------------------------------
Message: 8
Date: Sat, 22 Dec 2018 10:09:00 -0700
From: Ron VE8RT <ve8rt@?????.??>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <20181222100900.cd8c72dedffca821d8e70a71@?????.??>
Content-Type: text/plain; charset=US-ASCII
Super, really good news JoAnne!
when I first got back on the sats (was active from FP as FP/VE1KM
and FP4EK, then FP5EK in the 1990's) I used Gpredict but added the satellite
data by
hand. I'll follow your instructions.
Ron VE8RT
On Sat, 22 Dec 2018 08:19:56 -0600
"JoAnne K9JKM" <joanne.k9jkm@?????.???> wrote:
> Good morning Ron,
>
> > Ideally I guess would be a small package with Fox Telem running on
> > Raspberry Pi like processor, tied to a SDRPlay receiver, on an omni
> > antenna.
>
> A pre-configured SD Card for the Raspberry Pi with the Raspbian operating
> system and FoxTelem loaded is available in the AMSAT Store:
> https://www.amsat.org/product/fox-in-a-box-raspberry-pi-sd-card/
> Just insert the SD card in your Raspberry Pi and FoxTelem starts when you
> boot up.
>
> I run the Fox In A Box with an inexpensive $20 RTL-SDR dongle. It works but
> I've discovered a better receiver like the SDR Play will give better
> results. I'm using the pre-amp that used to be in the AMSAT Store - it was
> just laying around anyways. My antenna is a spare 2 meter vertical.
>
> > I have some work yet to do with the new Gpredict
> > installation too, satellites need to be added.
>
> GPredict will add satellites for you ...
>
> From the main screen select 'Edit --> Preferences'
> Then from that 'GPredict Preferences :: General' screen select the 'TLE
> Update' tab
> The TLE sources default to Celestrak, etc. I changed my TLE source to AMSAT:
> Make the TLE source http://www.amsat.org/amsat/ftp/keps/current/nasabare.txt
> on some GPredict versions you make the source:
> http://www.amsat.org/amsat/ftp/keps/current/ and then make the file to
> retrieve nasabare.txt
> Check the option for 'Add new satellites to local database' box. You'll get
> all of the recent satellites and every time a new satellite is added to the
> Keps it will be added at your QTH when you update the Keps. Pick the new
> satellite from the configuration view.
>
> --
> 73 de JoAnne K9JKM
> k9jkm@?????.???
>
>
> _______________________________________________
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
--
Ron VE8RT <ve8rt@?????.??>
------------------------------
Message: 9
Date: Sat, 22 Dec 2018 11:51:08 -0600
From: "Mac A. Cody" <maccody@???.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <e4d9d8e7-1982-0531-07fd-9979cecaf333@???.???>
Content-Type: text/plain; charset=utf-8; format=flowed
JoAnne,
I wonder if a bandpass filter might help with the performance
of your RTL-SDR dongle?? The built-in filters on these dongles
are quite broad, so even a bandpass filter covering just the
2-meter band would help reduce noise.
Are you using the pre-amp with the SDRPlay or were you using it
with the RTL-SDR dongle?? My RSP2 has a pre-amp built in and I've
used it to receive transmissions from satellites with no problem.
From my experience the RTL-SDR dongles need a pre-amp and extra
front-end filtering for many radio applications.
73,
Mac Cody / AE5PH
On 12/22/18 8:19 AM, JoAnne K9JKM wrote:
> Good morning Ron,
>
>> Ideally I guess would be a small package with Fox Telem running on
>> Raspberry Pi like processor, tied to a SDRPlay receiver, on an omni
>> antenna.
> A pre-configured SD Card for the Raspberry Pi with the Raspbian operating
> system and FoxTelem loaded is available in the AMSAT Store:
> https://www.amsat.org/product/fox-in-a-box-raspberry-pi-sd-card/
> Just insert the SD card in your Raspberry Pi and FoxTelem starts when you
> boot up.
>
> I run the Fox In A Box with an inexpensive $20 RTL-SDR dongle. It works but
> I've discovered a better receiver like the SDR Play will give better
> results. I'm using the pre-amp that used to be in the AMSAT Store - it was
> just laying around anyways. My antenna is a spare 2 meter vertical.
>
>> I have some work yet to do with the new Gpredict
>> installation too, satellites need to be added.
> GPredict will add satellites for you ...
>
> >From the main screen select 'Edit --> Preferences'
> Then from that 'GPredict Preferences :: General' screen select the 'TLE
> Update' tab
> The TLE sources default to Celestrak, etc. I changed my TLE source to AMSAT:
> Make the TLE source http://www.amsat.org/amsat/ftp/keps/current/nasabare.txt
> on some GPredict versions you make the source:
> http://www.amsat.org/amsat/ftp/keps/current/ and then make the file to
> retrieve nasabare.txt
> Check the option for 'Add new satellites to local database' box. You'll get
> all of the recent satellites and every time a new satellite is added to the
> Keps it will be added at your QTH when you update the Keps. Pick the new
> satellite from the configuration view.
>
> --
> 73 de JoAnne K9JKM
> k9jkm@?????.???
>
>
> _______________________________________________
> 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.
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>
------------------------------
Message: 10
Date: Sat, 22 Dec 2018 12:44:19 -0600
From: "JoAnne K9JKM" <joanne.k9jkm@?????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <5c1e8602.1c69fb81.ab984.5d07@??.??????.???>
Content-Type: text/plain; charset="UTF-8"
Hello Mac,
True, the RSP2 does quite well with satellites. Over the past couple of
years I've likely used the RSP2 more than my FT-857D for getting the
downlinks.
> I wonder if a bandpass filter might help with the performance
> of your RTL-SDR dongle?
It very well may. The RTL-SDR.com site has a choice of filters for sale. But
how much more money should be thrown at a $100 experimental Fox Telemetry
receiver designed to be an inexpensive, deployable unit. The goal of making
a $10,000 super satellite station is not part of the system requirements for
this project. Nor is the expectation that it is a primary satellite station
in the shack.
It is a fun project though!
--
73 de JoAnne K9JKM
k9jkm@?????.???
------------------------------
Message: 11
Date: Sat, 22 Dec 2018 13:22:24 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fox telemetry software question
Message-ID: <5a8ea315-c1b4-c9fb-c830-144dc3be9aff@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 12/22/18 12:44, JoAnne K9JKM wrote:
>> I wonder if a bandpass filter might help with the performance
>> of your RTL-SDR dongle?
>
> It very well may. The RTL-SDR.com site has a choice of filters for sale.
But how much more money should be thrown at a $100 experimental Fox
Telemetry receiver designed to be an inexpensive, deployable unit. The goal
of making a $10,000 super satellite station is not part of the system
requirements for this project. Nor is the expectation that it is a primary
satellite station in the shack.
>
> It is a fun project though!
Ah, you've hit on it, JoAnne-
A cheap filter can be made very easily, and one has a lot of the test
equipment to show/tune the response right in the shack!
"Paint can" style helical filters:
http://www.pa0nhc.nl/IMDfilter/EN/IndexEN.htm
Fancy combline filters, which use probably hard-to-get miniature air
variable capacitors:
http://www.w1ghz.org/filter/Combline_Filters_for_VHF_and_UHF.pdf
Or, call on Andrew Jackson to solve the problem (cheaply):
https://www.hobbypcb.com/products/uhf-vhf-radio/144mhz-band-pass-filter
--- Zach
N0ZGO
------------------------------
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!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 13, Issue 432
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