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CX2SA > SATDIG 08.02.19 23:33l 944 Lines 29967 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: US IC-9700 prices announced (Stefan Wagener)
2. Re: Geostationary & HEO Satellites
(Patrick STODDARD (WD9EWK/VA7EWK))
3. Re: US IC-9700 prices announced (H. Stephen Nipper)
4. Re: US IC-9700 prices announced (Alan)
5. Re: ISS SSTV - Old and New (Henry Bond)
6. Icom IC-9700 (BeetleJerald Oliver)
7. Re: Geostationary & HEO Satellites (Simon Brown)
8. Re: Geostationary & HEO Satellites (Simon Brown)
9. Fw: Operating SSB sats (k6vug@?????????.????
10. Re: Fw: Operating SSB sats (Paul Stoetzer)
11. Re: Geostationary & HEO Satellites (Paul Andrews)
----------------------------------------------------------------------
Message: 1
Date: Fri, 8 Feb 2019 13:46:32 -0600
From: Stefan Wagener <wageners@?????.???>
To: Alan Biddle <APBIDDLE@???????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] US IC-9700 prices announced
Message-ID:
<CAKu8kHAHnf0JMbiBMGjkd890UAYRQ=Veg-UBTfeyePHiEME0UQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
If you think about it, with no competition on this VHF/UHF rig by Kenwood,
Yaesu, Flex, Anan.... Icom has free roaming.
On Fri, Feb 8, 2019 at 1:32 PM Alan <wa4sca@?????.???> wrote:
> Jerry,
>
> Think I will wait a bit for supply to catch up with demand. By then, we
> will know whether it works as claimed, particularly from a digital
> standpoint. Having dropped about $5k on a rig which didn't, the wait will
> be a good investment on a bucket list rig.
>
> 73,
>
> Alan
> WA4SCA
>
>
>
>
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Jerry
> <Buxton
> <Sent: Friday, February 08, 2019 13:20 PM
> <To: amsat-bb@?????.???
> <Subject: Re: [amsat-bb] US IC-9700 prices announced
> <
> <Kinda like PCs. I paid $1800-someodd dollars for a new FT-736R in
> <1993. Today a rig with similar function but way better performance (I
> <presume!) is about the same price.
> <$1800/25(years)=$72/year. Not bad. And it still works. If the 9700 is
> <worth a hoot it would only be about $84/year when I'm 88. What a bargain!
> <
> <Jerry Buxton, N?JY
> <
> <On 2/8/2019 12:41, Alan wrote:
> <> Per reports from HamCation, MSRP is $2195. HRO, GigaParts, and
> <> DXEngineering are listing them for $2095 for delivery 2Q.
> <>
> <> 73,
> <>
> <> Alan
> <> WA4SCA
> <>
> <>
> <>
> <> _______________________________________________
> <> 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: 2
Date: Fri, 8 Feb 2019 19:54:38 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@??????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
Message-ID:
<CAN6TEUedcvoDskagquXdo0wEpDVQr9iMZzQ9b8c48-RydDsq7w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi!
We can experience the delays you mentioned, even with LEO
satellites today. Use an SDR receiver on the downlink.
Unless the computer is very fast, there is a lag in hearing
the downlink. It was annoying at first, but now I don't
worry about listening for my voice. I can see signals on
the waterfall in the SDR software, and as long as I can
hear my voice coming through... I'm fine.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @?????? or http://twitter.com/WD9EWK
On Fri, Feb 8, 2019 at 7:44 PM jim@?????.??? <jim@?????.???> wrote:
> Paul Andrews said:
> > GEOSATs have another interesting characteristic. 600 ms round trip
> > delay due to the longer distance.
>
> 600 mSec is almost a triple hop, so not that long...
>
> For those of us that operated on AO-40 during it's unfortunately short
> life, when it was at or near apogee, it was well beyond the Geo belt, and
> that was entertaining. Of course most people on linear birds operate full
> duplex and it took a little to get used to hearing yourself with such along
> delay...
>
> 73
> -----
> Jim Walls - K6CCC
> jim@?????.???
>
>
------------------------------
Message: 3
Date: Fri, 8 Feb 2019 12:57:16 -0700
From: "H. Stephen Nipper" <stephennipper@?????.???>
To: APBIDDLE@???????.???
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] US IC-9700 prices announced
Message-ID:
<CAPf7+3q2yG+dYnWvQaaun9iC1Am7v3a-+aDmoPWid3JKGyP5rA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I know from past experience that a A model will be out within in year and
the price will be reduced. I am waiting until all of the bugs are worked
out.
On Fri, Feb 8, 2019, 12:32 PM Alan <wa4sca@?????.??? wrote:
> Jerry,
>
> Think I will wait a bit for supply to catch up with demand. By then, we
> will know whether it works as claimed, particularly from a digital
> standpoint. Having dropped about $5k on a rig which didn't, the wait will
> be a good investment on a bucket list rig.
>
> 73,
>
> Alan
> WA4SCA
>
>
>
>
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Jerry
> <Buxton
> <Sent: Friday, February 08, 2019 13:20 PM
> <To: amsat-bb@?????.???
> <Subject: Re: [amsat-bb] US IC-9700 prices announced
> <
> <Kinda like PCs. I paid $1800-someodd dollars for a new FT-736R in
> <1993. Today a rig with similar function but way better performance (I
> <presume!) is about the same price.
> <$1800/25(years)=$72/year. Not bad. And it still works. If the 9700 is
> <worth a hoot it would only be about $84/year when I'm 88. What a bargain!
> <
> <Jerry Buxton, N?JY
> <
> <On 2/8/2019 12:41, Alan wrote:
> <> Per reports from HamCation, MSRP is $2195. HRO, GigaParts, and
> <> DXEngineering are listing them for $2095 for delivery 2Q.
> <>
> <> 73,
> <>
> <> Alan
> <> WA4SCA
> <>
> <>
> <>
> <> _______________________________________________
> <> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum
> <available
> <> to all interested persons worldwide without requiring membership.
> <Opinions expressed
> <> are solely those of the author, and do not reflect the official views of
> <AMSAT-NA.
> <> Not an AMSAT-NA member? Join now to support the amateur satellite
> <program!
> <> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> <>
> <>
> <
> <_______________________________________________
> <Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> <to all interested persons worldwide without requiring membership. Opinions
> <expressed
> <are solely those of the author, and do not reflect the official views of
> AMSAT-
> <NA.
> <Not an AMSAT-NA member? Join now to support the amateur satellite
> <program!
> <Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Fri, 8 Feb 2019 14:07:50 -0600
From: "Alan" <wa4sca@?????.???>
To: "'H. Stephen Nipper'" <stephennipper@?????.???>,
<APBIDDLE@???????.???>
Cc: 'AMSAT BB' <amsat-bb@?????.???>
Subject: Re: [amsat-bb] US IC-9700 prices announced
Message-ID: <000001d4bfe9$f84f0380$e8ed0a80$@?????.???>
Content-Type: text/plain; charset="utf-8"
I remember the old Ford commercial, "Quality is Job One!" At Microsoft, it
is "Quality is Job 1.1!" These days with many amateur manufacturers, not
just Icom, it is "Quality is Job -A!"
73,
Alan
WA4SCA
<-----Original Message-----
<From: H. Stephen Nipper [mailto:stephennipper@?????.????
<Sent: Friday, February 08, 2019 13:57 PM
<To: APBIDDLE@???????.???
<Cc: Jerry Buxton <n0jy@?????.???>; AMSAT BB <amsat-bb@?????.???>
<Subject: Re: [amsat-bb] US IC-9700 prices announced
<
<I know from past experience that a A model will be out within in year and the
<price will be reduced. I am waiting until all of the bugs are worked out.
<
<On Fri, Feb 8, 2019, 12:32 PM Alan <wa4sca@?????.???
<<mailto:wa4sca@?????.???> wrote:
<
<
< Jerry,
<
< Think I will wait a bit for supply to catch up with demand. By then, we
<will know whether it works as claimed, particularly from a digital
standpoint.
<Having dropped about $5k on a rig which didn't, the wait will be a good
<investment on a bucket list rig.
<
< 73,
<
< Alan
< WA4SCA
<
<
<
<
< <-----Original Message-----
< <From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???
<<mailto:amsat-bb-bounces@?????.???> ] On Behalf Of Jerry
< <Buxton
< <Sent: Friday, February 08, 2019 13:20 PM
< <To: amsat-bb@?????.??? <mailto:amsat-bb@?????.???>
< <Subject: Re: [amsat-bb] US IC-9700 prices announced
< <
< <Kinda like PCs. I paid $1800-someodd dollars for a new FT-736R in
< <1993. Today a rig with similar function but way better performance (I
< <presume!) is about the same price.
< <$1800/25(years)=$72/year. Not bad. And it still works. If the 9700 is
< <worth a hoot it would only be about $84/year when I'm 88. What a
<bargain!
< <
< <Jerry Buxton, N?JY
< <
< <On 2/8/2019 12:41, Alan wrote:
< <> Per reports from HamCation, MSRP is $2195. HRO, GigaParts, and
< <> DXEngineering are listing them for $2095 for delivery 2Q.
< <>
< <> 73,
< <>
< <> Alan
< <> WA4SCA
< <>
< <>
< <>
< <> _______________________________________________
< <> Sent via AMSAT-BB@?????.??? <mailto: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@?????.??? <mailto: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@?????.??? <mailto: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: 5
Date: Fri, 8 Feb 2019 18:46:41 +0000
From: Henry Bond <henry.bnd@?????.???>
To: Bill Booth <ve3nxk@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] ISS SSTV - Old and New
Message-ID:
<CADHdxtvimwQsR9_SFS65pD2sWdwTZ8RWdMTS55yPcKnxFejYRw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I use
https://play.google.com/store/apps/details?id=xdsopl.robot36
To decode my SSTV signals, point a fm ht at the ISS or attach it to a
vertical, and just use the audio to decode.
I'm sure there's an apple equivalent.
Henry
On Fri, 8 Feb 2019, 18:09 Bill Booth <ve3nxk@?????.??? wrote:
> On 2019-02-08 12:11 PM, Robert Bruninga wrote:
> >OLD FUD Approach: MELINNIAL APPROACH:
>
> Using the old method one learns how it all works..trial, error and
> experiment.
> This to me is the real ham radio experience. I remember all that stuff
> from my
> SWl days and ham radio for almost 60 years now. I am still doing it that
> way with
> EME on 23cm.
>
> Now the new way they know nothing...soon there will be an app (if there
> isn't
> already) to work the sats with a dongle and the portable device...but the
> user
> will know nothing.
>
> With all the conversation lately on here lately it appears most tend to be
> an
> appliance operator and it should be like a local repeater.
>
> I guess my age is showing but I remember the bit about the ham who did
> eveything
> AUTO in their shack...including the card...but was never home.
>
> Sorry to vent here but I miss the old days of trial,error and experiment
> to learn.
>
>
> --
> Bill Booth VE3NXK
> Sundridge ON, Canada
> 79.23.37 W x 45.46.18 N
> FN05ns
>
> Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
>
> Organ and Tissue Donation - The Gift of Life
> Talk to your family. Your decision can make a difference.
> _______________________________________________
> 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: Fri, 8 Feb 2019 19:06:11 +0000 (UTC)
From: BeetleJerald Oliver <revjwo@???.???>
To: <amsat-bb@?????.???>
Subject: [amsat-bb] Icom IC-9700
Message-ID: <1687647343.527537.1549652771190@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Hope the radio is reduced somewhat in price when the initial surge is
over.....May still just keep my Yaesu FT-847. Already have my M2 antenna
for L Band, but will need a transverter of some type for TX...Any suggestons
appreciated.....
KJ4EU Jerry
------------------------------
Message: 7
Date: Fri, 8 Feb 2019 21:07:30 -0000
From: "Simon Brown" <simon@?????????.???>
To: "'AMSAT BB'" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
Message-ID: <023b01d4bff2$4dcd2d70$e9678850$@?????????.???>
Content-Type: text/plain; charset="UTF-8"
Paul,
Unless there's significant latency inside the satellite, I think you're out
by a factor of two. Round trip is 2 x 40,000 km (*) = 80,000 km total. Speed
of light and radio latency says we're looking at closer to 300 ms.
(*) depending on where you are on the mother planet.
Simon Brown, G4ELI
www.sdr-radio.com
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Paul Andrews
Sent: 08 February 2019 19:27
To: Les Rayburn <les@????????????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
GEOSATs have another interesting characteristic. 600 ms round trip
delay due to the longer distance.
Does anyone remember when MCI first started providing a discounted long
distance telephone service?
This will make voice QSOs a little unnatural but certainly not impossible.
73 - Paul - W2HRO
On Fri, Feb 8, 2019 at 12:21 PM Les Rayburn <les@????????????.???> wrote:
>
> I?m also a newcomer to the birds, but very excited about it. Likewise, I
responded to the survey, but wanted to comment further regarding
geostationary and HEO satellites.
>
> In the camp of ?Both, please.? The HEO birds would once again offer the
possibility of DXCC and make WAS more realistic?it also offers more
operating challenges.
>
> But a geostationary amateur satellite would have many interesting benefits:
>
> Provide an easier introduction to satellite operation, and attract new
operators.
> Excellent tool for emergency communications during a natural disaster.
> Opportunity to experiment with microwave operations.
> The ability to enjoy satellite operation any time of the day/night. The
band is always open.
>
> I?m grateful for anyone who incorporates amateur radio into their
satellites, but feel that birds should include either linear, digital, or FM
transponders whenever possible. Designers are asking a lot of hams when they
solicit our monitoring their telemetry signals, and using amateur spectrum
for their purposes without much tangible benefit to us. My opinion only.
>
> It?s wonderful that they asked us. Dialogue is the key to most human
accomplishment.
>
>
> 73,
>
> Les Rayburn, N1LF
> Maylene, AL
> EM63nf
> AMSAT #38965, ARRL Life Member, CVHS Life Member, SVHF Member
>
>
>
>
> _______________________________________________
> 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: 8
Date: Fri, 8 Feb 2019 21:12:07 -0000
From: "Simon Brown" <simon@?????????.???>
To: "'AMSAT BB'" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
Message-ID: <023e01d4bff2$f2ff5e80$d8fe1b80$@?????????.???>
Content-Type: text/plain; charset="UTF-8"
Unless, of course you're referring to the Me => Him => Me delay ?.
Simon Brown, G4ELI
www.sdr-radio.com
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Simon Brown
Sent: 08 February 2019 21:08
To: 'AMSAT BB' <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
Paul,
Unless there's significant latency inside the satellite, I think you're out
by a factor of two. Round trip is 2 x 40,000 km (*) = 80,000 km total. Speed
of light and radio latency says we're looking at closer to 300 ms.
(*) depending on where you are on the mother planet.
Simon Brown, G4ELI
www.sdr-radio.com
------------------------------
Message: 9
Date: Fri, 8 Feb 2019 21:13:19 +0000 (UTC)
From: "k6vug@?????????.???? <k6vug@?????????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Fw: Operating SSB sats
Message-ID: <877720787.617626.1549660399084@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Thanks Patrick.?
Not to spam the BB, but here is one last clip - working K7TAB via CAS-4B
this morning.
https://drive.google.com/open?id=1DYbg1Ua8_MfZnBjpngBjGxAApB5fcq82
I use the CW beacon to wait for adequate signal and then (at 00:40) switch
to the transponder pair, adjusting the uplink with a tone burst until it
comes in at about 800 Hz on the bottom display.? After that I can move the
down-link around the pass-band and don't have to worry about the uplink. HRD
(and SatPC32) do a great job of handling the Doppler adjustments.
Obviously, you'll notice the signal from the CAS-4B ges pretty strong as
soon as it comes up above 15 degrees or so.? I keep an eye on the CW beacon
(at the left of the waterfall) throughout the pass and watch-out for fading
due to foliage, buildings etc.
Fast forward to 3:20, I've tuned to K7TAB and start responding.
You'll notice that K7TAB drifts a little as he is speaking.? However, you'll
also notice that K7TAB has moved quite a lot AFTER I have responded and so I
have to re-tune the down-link to hear the response properly. Well, that is
the issue I wish to illustrate, and am still working on it.... :)
Again, sorry for several posts, won't post any more until I have figured it
out.?
Have a great weekend.
73!Umesh, k6vug
On Thursday, February 7, 2019, 8:52:05 PM PST, Patrick STODDARD
<patrick@??????.???> wrote:
Umesh,
Very nice! Thanks for sharing the video clip.
73!
Patrick
From: "k6vug@?????????.???? <k6vug@?????????.???>
To: Patrick STODDARD <patrick@??????.???>
Sent: Thursday, February 7, 2019 11:26 PM
Subject: Re: [amsat-bb] Operating SSB sats
Hi Patrick,
About the RTL-SDR, I just wanted to share a short clip I recorded capturing
CAS-4A CW beacon with HRD handling the Doppler tracking.
https://drive.google.com/open?id=1UCrYTb74ZnVG2Xc3FWlF7YImFasjwCKz
73!Umesh
------------------------------
Message: 10
Date: Fri, 8 Feb 2019 16:17:14 -0500
From: Paul Stoetzer <n8hm@????.???>
To: "k6vug@?????????.???? <k6vug@?????????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Fw: Operating SSB sats
Message-ID:
<CABzOSOq-Ao=8S3hLNpJU3Aj-8X5WvxNn6BdkdqAh1priomjrdg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
K7TAB was operating without computer control, so its not surprising
you'd have to chase him a bit.
73,
Paul, N8HM
On Fri, Feb 8, 2019 at 4:14 PM k6vug@?????????.??? <k6vug@?????????.???>
wrote:
>
> Thanks Patrick.
>
> Not to spam the BB, but here is one last clip - working K7TAB via CAS-4B
this morning.
>
> https://drive.google.com/open?id=1DYbg1Ua8_MfZnBjpngBjGxAApB5fcq82
> I use the CW beacon to wait for adequate signal and then (at 00:40) switch
to the transponder pair, adjusting the uplink with a tone burst until it
comes in at about 800 Hz on the bottom display. After that I can move the
down-link around the pass-band and don't have to worry about the uplink. HRD
(and SatPC32) do a great job of handling the Doppler adjustments.
>
> Obviously, you'll notice the signal from the CAS-4B ges pretty strong as
soon as it comes up above 15 degrees or so. I keep an eye on the CW beacon
(at the left of the waterfall) throughout the pass and watch-out for fading
due to foliage, buildings etc.
>
> Fast forward to 3:20, I've tuned to K7TAB and start responding.
>
> You'll notice that K7TAB drifts a little as he is speaking. However,
you'll also notice that K7TAB has moved quite a lot AFTER I have responded
and so I have to re-tune the down-link to hear the response properly. Well,
that is the issue I wish to illustrate, and am still working on it.... :)
>
> Again, sorry for several posts, won't post any more until I have figured
it out.
> Have a great weekend.
>
> 73!Umesh, k6vug
>
>
>
> On Thursday, February 7, 2019, 8:52:05 PM PST, Patrick STODDARD
<patrick@??????.???> wrote:
>
> Umesh,
>
> Very nice! Thanks for sharing the video clip.
>
> 73!
>
>
>
>
> Patrick
>
>
> From: "k6vug@?????????.???? <k6vug@?????????.???>
> To: Patrick STODDARD <patrick@??????.???>
> Sent: Thursday, February 7, 2019 11:26 PM
> Subject: Re: [amsat-bb] Operating SSB sats
>
> Hi Patrick,
> About the RTL-SDR, I just wanted to share a short clip I recorded
capturing CAS-4A CW beacon with HRD handling the Doppler tracking.
>
> https://drive.google.com/open?id=1UCrYTb74ZnVG2Xc3FWlF7YImFasjwCKz
>
>
> 73!Umesh
>
>
>
>
> _______________________________________________
> 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: 11
Date: Fri, 8 Feb 2019 16:20:26 -0500
From: Paul Andrews <w2hro.fn20@?????.???>
To: Simon Brown <simon@?????????.???>
Cc: amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Geostationary & HEO Satellites
Message-ID:
<CAOsf+NT3KjH7tMT-jwOv_cC8Yuj6QT9K6dzaAtdQSm-3RdkxaQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Simon,
I spent 20 years building data circuits using geosynchronous satellites.
During that time, my definition of round trip was
uplink-dowlink-uplink-downlink or 4 x 150ms (plus or minus a small amount
of Doppler).
Yes - you're correct - the loopback delay is 300ms. But if you communicate
with another person on Earth, the round trip delay is 600ms.
If you tell someone a joke, you won't hear the laugh until after a 600ms
delay. This is only true for a good joke. Tell a bad joke and the delay
will be infinite. :O
73 - Paul - W2HRO
On Fri, Feb 8, 2019, 16:09 Simon Brown <simon@?????????.???> wrote:
> Paul,
>
> Unless there's significant latency inside the satellite, I think you're
> out by a factor of two. Round trip is 2 x 40,000 km (*) = 80,000 km total.
> Speed of light and radio latency says we're looking at closer to 300 ms.
>
> (*) depending on where you are on the mother planet.
>
> Simon Brown, G4ELI
> www.sdr-radio.com
>
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Paul Andrews
> Sent: 08 February 2019 19:27
> To: Les Rayburn <les@????????????.???>
> Cc: AMSAT BB <amsat-bb@?????.???>
> Subject: Re: [amsat-bb] Geostationary & HEO Satellites
>
> GEOSATs have another interesting characteristic. 600 ms round trip
> delay due to the longer distance.
>
> Does anyone remember when MCI first started providing a discounted long
> distance telephone service?
>
> This will make voice QSOs a little unnatural but certainly not impossible.
>
> 73 - Paul - W2HRO
>
>
>
>
>
> On Fri, Feb 8, 2019 at 12:21 PM Les Rayburn <les@????????????.???> wrote:
> >
> > I?m also a newcomer to the birds, but very excited about it. Likewise, I
> responded to the survey, but wanted to comment further regarding
> geostationary and HEO satellites.
> >
> > In the camp of ?Both, please.? The HEO birds would once again offer the
> possibility of DXCC and make WAS more realistic?it also offers more
> operating challenges.
> >
> > But a geostationary amateur satellite would have many interesting
> benefits:
> >
> > Provide an easier introduction to satellite operation, and attract new
> operators.
> > Excellent tool for emergency communications during a natural disaster.
> > Opportunity to experiment with microwave operations.
> > The ability to enjoy satellite operation any time of the day/night. The
> band is always open.
> >
> > I?m grateful for anyone who incorporates amateur radio into their
> satellites, but feel that birds should include either linear, digital, or
> FM transponders whenever possible. Designers are asking a lot of hams when
> they solicit our monitoring their telemetry signals, and using amateur
> spectrum for their purposes without much tangible benefit to us. My opinion
> only.
> >
> > It?s wonderful that they asked us. Dialogue is the key to most human
> accomplishment.
> >
> >
> > 73,
> >
> > Les Rayburn, N1LF
> > Maylene, AL
> > EM63nf
> > AMSAT #38965, ARRL Life Member, CVHS Life Member, SVHF Member
> >
> >
> >
> >
> > _______________________________________________
> > 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
>
------------------------------
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 14, Issue 52
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