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Today's Topics:
1. Re: Unsuccessful Uplinks - AO-92 (Hugo Dominguez, Jr.)
2. Re: Unsuccessful Uplinks - AO-92 (Jean Marc Momple)
3. Re: Unsuccessful Uplinks - AO-92 (Jerry Buxton)
4. Re: Unsuccessful Uplinks - AO-92 (Hugo Dominguez, Jr.)
5. Re: Unsuccessful Uplinks - AO-92 (k6vug@?????????.????
6. Re: Unsuccessful Uplinks - AO-92 (k6vug@?????????.????
7. Re: Unsuccessful Uplinks - AO-92 (Jean Marc Momple)
----------------------------------------------------------------------
Message: 1
Date: Thu, 7 Jun 2018 10:04:23 -0700
From: "Hugo Dominguez, Jr." <hugois@?????.???>
To: Daniel Wight <kd7lee@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <34F0B701-0073-4167-BFAE-4856D91E2916@?????.???>
Content-Type: text/plain; charset=utf-8
Someone mentioned to me that AO-91 was made to be worked by handhelds. They
also mentioned that AO-85 actually has a damaged receive antenna and that
you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85
and SO-50?
?
Hugo Dominguez, Jr.
> On Jun 6, 2018, at 23:08, Daniel Wight <kd7lee@?????.???> wrote:
>
> As Gabe pointed out, I may have this backwards as I started out on SO-50
(V/U) & then applied my original techniques to the Fox (U/V) birds in error
(i.e. your initial settings are probably correct). I need to do some more
research before I understand this fully, but it looks like I've been using
the wrong uplink frequencies on my IC-W32A. My apologies for the mistake.
Looks like I'll be reprogramming my radio soon....
>
> 73,
>
> Daniel, KD7LEE
>
>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has
instructions to do it how I am doing it:
https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>
>> I also just noticed that there is a schedule for the L-band for uplink
which i?m interpreting that UHF won?t work when the bird is setup for the
L-band for uplink. Maybe I was trying to make contact when it was on the L
band.
>>
>> ?
>> Hugo Dominguez, Jr.
>>
>>> On Jun 6, 2018, at 21:07, Daniel Wight <kd7lee@?????.???> wrote:
>>>
>>> Seems like your Doppler shift might be opposite. I normally start high &
work my way down during the satellite pass... (For instance, I would start
at 435.180 for AO-85 and then work my way down to 435.160 as the satellite
'sunsets' on my horizon). Doppler shift should be higher frequency during
approach, near zero when the satellite is overhead, and lower after the
satellite passes.
>>>
>>> 73,
>>>
>>> Daniel, KD7LEE
>>>
>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner
<glasbrenner@??????????.???> wrote:
>>>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear
while transmitting.
>>>>
>>>> Got another radio so you can work full duplex?
>>>>
>>>> 73, Drew KO4MA
>>>>
>>>> -----Original Message-----
>>>> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Hugo
Dominguez, Jr.
>>>> Sent: Wednesday, June 06, 2018 7:41 PM
>>>> To: amsat-bb@?????.???
>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
>>>>
>>>> I?ve just started playing with talking on satellites. I?m able to hear
all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on
my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna.
However no one can hear me or responds to me. I?ve only been successful with
my uplink (being heard) on AO-91 on several passes. I triple checked my
frequencies on my radio and the 67 Hz tone and they are set as follows:
>>>> Sat. Xmit Tone
>>>> SO-50 145.850 67.0 Hz
>>>> AO-85 435.170 67.0 Hz
>>>> AO-91 435.250 67.0 HZ
>>>> AO-92 435.350 67.0 Hz
>>>> These are the frequencies used when the bird is at its peak. I adjust
for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165,
435.170, 435.175, 435.180.
>>>>
>>>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i?ve been able to communicate on AO-91.
>>>>
>>>> ?
>>>> Hugo Dominguez, Jr.
>>>> _______________________________________________
>>>> 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: Thu, 7 Jun 2018 21:30:35 +0400
From: Jean Marc Momple <jean.marc.momple@?????.???>
To: "Hugo Dominguez, Jr." <hugois@?????.???>
Cc: Francois Lincoln <flincoln@???????.???>, AMSAT BB
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <650C77AC-8EEF-4ED9-BF4A-E4B4E2327F37@?????.???>
Content-Type: text/plain; charset=utf-8
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type
of antenna while on the beach this side of the globe. He made QSO?s with
South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few
more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between 15
and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
> On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>
> Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and
that you need more power. Is that correct? Is 5 watts sufficient for AO-92,
AO-85 and SO-50?
>
> ?
> Hugo Dominguez, Jr.
>
>> On Jun 6, 2018, at 23:08, Daniel Wight <kd7lee@?????.???> wrote:
>>
>> As Gabe pointed out, I may have this backwards as I started out on SO-50
(V/U) & then applied my original techniques to the Fox (U/V) birds in error
(i.e. your initial settings are probably correct). I need to do some more
research before I understand this fully, but it looks like I've been using
the wrong uplink frequencies on my IC-W32A. My apologies for the mistake.
Looks like I'll be reprogramming my radio soon....
>>
>> 73,
>>
>> Daniel, KD7LEE
>>
>>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has
instructions to do it how I am doing it:
https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>>
>>> I also just noticed that there is a schedule for the L-band for uplink
which i?m interpreting that UHF won?t work when the bird is setup for the
L-band for uplink. Maybe I was trying to make contact when it was on the L
band.
>>>
>>> ?
>>> Hugo Dominguez, Jr.
>>>
>>>> On Jun 6, 2018, at 21:07, Daniel Wight <kd7lee@?????.???> wrote:
>>>>
>>>> Seems like your Doppler shift might be opposite. I normally start high
& work my way down during the satellite pass... (For instance, I would start
at 435.180 for AO-85 and then work my way down to 435.160 as the satellite
'sunsets' on my horizon). Doppler shift should be higher frequency during
approach, near zero when the satellite is overhead, and lower after the
satellite passes.
>>>>
>>>> 73,
>>>>
>>>> Daniel, KD7LEE
>>>>
>>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner
<glasbrenner@??????????.???> wrote:
>>>>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear
while transmitting.
>>>>>
>>>>> Got another radio so you can work full duplex?
>>>>>
>>>>> 73, Drew KO4MA
>>>>>
>>>>> -----Original Message-----
>>>>> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Hugo
Dominguez, Jr.
>>>>> Sent: Wednesday, June 06, 2018 7:41 PM
>>>>> To: amsat-bb@?????.???
>>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
>>>>>
>>>>> I?ve just started playing with talking on satellites. I?m able to hear
all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on
my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna.
However no one can hear me or responds to me. I?ve only been successful with
my uplink (being heard) on AO-91 on several passes. I triple checked my
frequencies on my radio and the 67 Hz tone and they are set as follows:
>>>>> Sat. Xmit Tone
>>>>> SO-50 145.850 67.0 Hz
>>>>> AO-85 435.170 67.0 Hz
>>>>> AO-91 435.250 67.0 HZ
>>>>> AO-92 435.350 67.0 Hz
>>>>> These are the frequencies used when the bird is at its peak. I adjust
for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165,
435.170, 435.175, 435.180.
>>>>>
>>>>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i?ve been able to communicate on AO-91.
>>>>>
>>>>> ?
>>>>> Hugo Dominguez, Jr.
>>>>> _______________________________________________
>>>>> 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: 3
Date: Thu, 7 Jun 2018 12:44:51 -0500
From: Jerry Buxton <n0jy@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <8044c4d3-0e11-cc60-2867-d48914acfd8a@?????.???>
Content-Type: text/plain; charset=utf-8
On 6/7/2018 12:04, Hugo Dominguez, Jr. wrote:
> Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and
that you need more power. Is that correct?
I talk about AO-85's hearing problem along with some images, in my
YouTube video "The Good and The Bad With AO-91"
https://youtu.be/no4pHx02lSI
Jerry Buxton, N?JY
------------------------------
Message: 4
Date: Thu, 7 Jun 2018 10:41:30 -0700
From: "Hugo Dominguez, Jr." <hugois@?????.???>
To: Jean Marc Momple <jean.marc.momple@?????.???>
Cc: Francois Lincoln <flincoln@???????.???>, amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <E9410188-1491-42C7-B5FE-3113C77C4A35@?????.???>
Content-Type: text/plain; charset=utf-8
Thanks for the feedback. I?ll keep trying. Is the Baofang being used the 5
watt or 8 watt version? Right now it is hard holding two radios and the
antenna. Maybe I can strap it to my antenna and use it for listening for
myself. I should also look at mounting my antenna to an old camera tripod to
free my hand
?
Hugo Dominguez, Jr.
> On Jun 7, 2018, at 10:30, Jean Marc Momple <jean.marc.momple@?????.???>
wrote:
>
> Hugo,
>
> Just to share experience.
>
> 3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type
of antenna while on the beach this side of the globe. He made QSO?s with
South Africa, Madagascar and locals with less than 4W.
>
> SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few
more W for clear QSO.
>
> AO-85 is quite hard-hearing and depending on its path you need between 15
and 50 W with a 10-15 ele yagi to go through reasonably.
>
>
> Hope this help.
>
>
> 73
>
>
>
> Jean Marc (3B8DU)
>
>
>
>
>
>
>> On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>>
>> Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and
that you need more power. Is that correct? Is 5 watts sufficient for AO-92,
AO-85 and SO-50?
>>
>> ?
>> Hugo Dominguez, Jr.
>>
>>> On Jun 6, 2018, at 23:08, Daniel Wight <kd7lee@?????.???> wrote:
>>>
>>> As Gabe pointed out, I may have this backwards as I started out on SO-50
(V/U) & then applied my original techniques to the Fox (U/V) birds in error
(i.e. your initial settings are probably correct). I need to do some more
research before I understand this fully, but it looks like I've been using
the wrong uplink frequencies on my IC-W32A. My apologies for the mistake.
Looks like I'll be reprogramming my radio soon....
>>>
>>> 73,
>>>
>>> Daniel, KD7LEE
>>>
>>>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>>>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has
instructions to do it how I am doing it:
https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>>>
>>>> I also just noticed that there is a schedule for the L-band for uplink
which i?m interpreting that UHF won?t work when the bird is setup for the
L-band for uplink. Maybe I was trying to make contact when it was on the L
band.
>>>>
>>>> ?
>>>> Hugo Dominguez, Jr.
>>>>
>>>>> On Jun 6, 2018, at 21:07, Daniel Wight <kd7lee@?????.???> wrote:
>>>>>
>>>>> Seems like your Doppler shift might be opposite. I normally start high
& work my way down during the satellite pass... (For instance, I would start
at 435.180 for AO-85 and then work my way down to 435.160 as the satellite
'sunsets' on my horizon). Doppler shift should be higher frequency during
approach, near zero when the satellite is overhead, and lower after the
satellite passes.
>>>>>
>>>>> 73,
>>>>>
>>>>> Daniel, KD7LEE
>>>>>
>>>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner
<glasbrenner@??????????.???> wrote:
>>>>>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear
while transmitting.
>>>>>>
>>>>>> Got another radio so you can work full duplex?
>>>>>>
>>>>>> 73, Drew KO4MA
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Hugo
Dominguez, Jr.
>>>>>> Sent: Wednesday, June 06, 2018 7:41 PM
>>>>>> To: amsat-bb@?????.???
>>>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
>>>>>>
>>>>>> I?ve just started playing with talking on satellites. I?m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have
programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic
log antenna. However no one can hear me or responds to me. I?ve only been
successful with my uplink (being heard) on AO-91 on several passes. I triple
checked my frequencies on my radio and the 67 Hz tone and they are set as
follows:
>>>>>> Sat. Xmit Tone
>>>>>> SO-50 145.850 67.0 Hz
>>>>>> AO-85 435.170 67.0 Hz
>>>>>> AO-91 435.250 67.0 HZ
>>>>>> AO-92 435.350 67.0 Hz
>>>>>> These are the frequencies used when the bird is at its peak. I adjust
for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165,
435.170, 435.175, 435.180.
>>>>>>
>>>>>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i?ve been able to communicate on AO-91.
>>>>>>
>>>>>> ?
>>>>>> Hugo Dominguez, Jr.
>>>>>> _______________________________________________
>>>>>> 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: 5
Date: Thu, 7 Jun 2018 17:44:04 +0000 (UTC)
From: "k6vug@?????????.???? <k6vug@?????????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <625418571.1857931.1528393444610@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Hugo, you wrote, "perform doppler shift by starting 10 kHz below and work
your way up", but this should not be generalized because the Doppler
correction is opposite for the Receiver and the Transmitter.?
(1) At the Receiver -
- when the transmitter (bird) is coming towards you, its frequency appears
higher than its real frequency
- when the transmitter (bird) is going away from you, its frequency appears
lower than its real frequency
(2) So, ideally, the Transmitter, has to compensate the opposite way, to be
received at the correct frequency.?
(3) But since the satellite does not use Doppler corrections, the ground
station has to provide the correction for both RX as well as TX.?
If you like, you can read the amazing article "The One True Rule For Doppler
Correction", published by AMSAT in 1994.? The key words are "AT THE
SATELLITE".? Also, just watch the frequencies shown by any satellite
tracking program like SatPC32 or HRD Sat Tracker, and you'll see what is
really going on.? Happy bird hunting...!
73!?
Umesh, K6VUG
------------------------------
Message: 4
Date: Wed, 6 Jun 2018 21:50:20 -0700
From: "Hugo Dominguez, Jr." <hugois@?????.???>
To: Daniel Wight <kd7lee@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <00C95211-D98E-4656-A393-D425DA744CF2@?????.???>
Content-Type: text/plain;??? charset=utf-8
Thanks. All the web pages I read said to perform doppler shift by starting
10 kHz below and work your way up. Even this amsat website has instructions
to do it how I am doing it:
https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which
i?m interpreting that UHF won?t work when the bird is setup for the L-band
for uplink. Maybe I was trying to make contact when it was on the L band.
?
Hugo Dominguez, Jr.
------------------------------
Message: 6
Date: Thu, 7 Jun 2018 17:48:03 +0000 (UTC)
From: "k6vug@?????????.???? <k6vug@?????????.???>
To: Don KB2YSI <kb2ysi@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <1055875960.1884780.1528393683999@????.?????.???>
Content-Type: text/plain; charset=UTF-8
I completely agree, but now I'm looking into replacing it with a HF+VHF+UHF
Triplexer explicitly for the SDR Receiver.?
73!Umesh, K6VUG
On Thursday, June 7, 2018, 7:02:17 AM PDT, Don KB2YSI <kb2ysi@?????.???>
wrote:
Full duplex without desensitization rules, I never knew how much until I
put a MFJ-916B into my setup.?
I have a few pictures and a diagram on my hamqth.com/KB2YSI page if anyone
is interested.?
73, Don KB2YSI
On Thu, Jun 7, 2018, 09:28 k6vug@?????????.??? <k6vug@?????????.???> wrote:
?
Drew KO4MA, is absolutely right, operating full duplex is the best way to
work these satellites.
Having said that, I was stumped once when I heard the AO-92 downlink "full
quieting" for the entire pass but could not get into the uplink. Strangely
enough, I heard only 2 stations calling and no one responding.
It was pretty frustrating, making me doubt everything I had learned so far.?
Then one day, I found out (right here on this BBS) that the satellite
switches to L/V mode, then it all made sense. Now I always check the current
status page at AMSAT.ORG especially when operating AO-92.?
I also learned about why it difficult to get into AO-85 with a HT.? Keep
reading, you'll learn a lot here from the gurus... trust me :)??
Good luck on the next pass...?
73!Umeshk6vug
? ------------------------------
Message: 12
Date: Wed, 6 Jun 2018 20:25:49 -0400
From: "Andrew Glasbrenner" <glasbrenner@??????????.???>
To: "'Hugo Dominguez, Jr.'" <hugois@?????.???>,??? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <002c01d3fdf6$16120c20$42362460$@??????????.???>
Content-Type: text/plain;??? charset="UTF-8"
You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear
while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Hugo Dominguez, Jr.
Sent: Wednesday, June 06, 2018 7:41 PM
To: amsat-bb@?????.???
Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I?ve just started playing with talking on satellites. I?m able to hear all
the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my
Kenwood TH-D74, which I use with my Elk dual band periodic log antenna.
However no one can hear me or responds to me. I?ve only been successful with
my uplink (being heard) on AO-91 on several passes. I triple checked my
frequencies on my radio and the 67 Hz tone and they are set as follows:
Sat.? ? ? ? Xmit? ? ? Tone
SO-50? 145.850? 67.0 Hz
AO-85? 435.170? 67.0 Hz
AO-91? 435.250? 67.0 HZ
AO-92? 435.350? 67.0 Hz
These are the frequencies used when the bird is at its peak. I adjust for
doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165,
435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing
something? Like I said, i?ve been able to communicate on AO-91.
?
Hugo Dominguez, Jr.
------------------------------
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
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Message: 7
Date: Thu, 7 Jun 2018 22:00:41 +0400
From: Jean Marc Momple <jean.marc.momple@?????.???>
To: "Hugo Dominguez, Jr." <hugois@?????.???>
Cc: Francois Lincoln <flincoln@???????.???>, amsat-bb@?????.???
Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Message-ID: <9BAF1C77-0E15-4253-B83B-FBEF705CE610@?????.???>
Content-Type: text/plain; charset=utf-8
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with
only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM?s
which trigger Francois venture on the birds.
73
Jean Marc
> On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>
> Thanks for the feedback. I?ll keep trying. Is the Baofang being used the 5
watt or 8 watt version? Right now it is hard holding two radios and the
antenna. Maybe I can strap it to my antenna and use it for listening for
myself. I should also look at mounting my antenna to an old camera tripod to
free my hand
>
> ?
> Hugo Dominguez, Jr.
>
>> On Jun 7, 2018, at 10:30, Jean Marc Momple <jean.marc.momple@?????.???>
wrote:
>>
>> Hugo,
>>
>> Just to share experience.
>>
>> 3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type
of antenna while on the beach this side of the globe. He made QSO?s with
South Africa, Madagascar and locals with less than 4W.
>>
>> SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few
more W for clear QSO.
>>
>> AO-85 is quite hard-hearing and depending on its path you need between 15
and 50 W with a 10-15 ele yagi to go through reasonably.
>>
>>
>> Hope this help.
>>
>>
>> 73
>>
>>
>>
>> Jean Marc (3B8DU)
>>
>>
>>
>>
>>
>>
>>> On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>>>
>>> Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and
that you need more power. Is that correct? Is 5 watts sufficient for AO-92,
AO-85 and SO-50?
>>>
>>> ?
>>> Hugo Dominguez, Jr.
>>>
>>>> On Jun 6, 2018, at 23:08, Daniel Wight <kd7lee@?????.???> wrote:
>>>>
>>>> As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in
error (i.e. your initial settings are probably correct). I need to do some
more research before I understand this fully, but it looks like I've been
using the wrong uplink frequencies on my IC-W32A. My apologies for the
mistake. Looks like I'll be reprogramming my radio soon....
>>>>
>>>> 73,
>>>>
>>>> Daniel, KD7LEE
>>>>
>>>>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <hugois@?????.???> wrote:
>>>>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has
instructions to do it how I am doing it:
https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>>>>
>>>>> I also just noticed that there is a schedule for the L-band for uplink
which i?m interpreting that UHF won?t work when the bird is setup for the
L-band for uplink. Maybe I was trying to make contact when it was on the L
band.
>>>>>
>>>>> ?
>>>>> Hugo Dominguez, Jr.
>>>>>
>>>>>> On Jun 6, 2018, at 21:07, Daniel Wight <kd7lee@?????.???> wrote:
>>>>>>
>>>>>> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I would
start at 435.180 for AO-85 and then work my way down to 435.160 as the
satellite 'sunsets' on my horizon). Doppler shift should be higher frequency
during approach, near zero when the satellite is overhead, and lower after
the satellite passes.
>>>>>>
>>>>>> 73,
>>>>>>
>>>>>> Daniel, KD7LEE
>>>>>>
>>>>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner
<glasbrenner@??????????.???> wrote:
>>>>>>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear
while transmitting.
>>>>>>>
>>>>>>> Got another radio so you can work full duplex?
>>>>>>>
>>>>>>> 73, Drew KO4MA
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Hugo
Dominguez, Jr.
>>>>>>> Sent: Wednesday, June 06, 2018 7:41 PM
>>>>>>> To: amsat-bb@?????.???
>>>>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
>>>>>>>
>>>>>>> I?ve just started playing with talking on satellites. I?m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have
programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic
log antenna. However no one can hear me or responds to me. I?ve only been
successful with my uplink (being heard) on AO-91 on several passes. I triple
checked my frequencies on my radio and the 67 Hz tone and they are set as
follows:
>>>>>>> Sat. Xmit Tone
>>>>>>> SO-50 145.850 67.0 Hz
>>>>>>> AO-85 435.170 67.0 Hz
>>>>>>> AO-91 435.250 67.0 HZ
>>>>>>> AO-92 435.350 67.0 Hz
>>>>>>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160,
435.165, 435.170, 435.175, 435.180.
>>>>>>>
>>>>>>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i?ve been able to communicate on AO-91.
>>>>>>>
>>>>>>> ?
>>>>>>> Hugo Dominguez, Jr.
>>>>>>> _______________________________________________
>>>>>>> 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
>>
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Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
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AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
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End of AMSAT-BB Digest, Vol 13, Issue 197
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