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CX2SA > SATDIG 16.03.20 01:45l 735 Lines 29164 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: High Power and Rudeness (Jeff Johns)
2. Re: KENWOOD TH-D74A (Armand SP3QFE)
3. Re: High Power and Rudeness (Don KB2YSI)
4. Re: KENWOOD TH-D74A (bernd1peters@?????.????
5. Re: KENWOOD TH-D74A (Don KB2YSI)
6. Re: High Power and Rudeness (Isaac C)
7. Re: High Power and Rudeness (Jeff Johns)
8. Re: High Power and Rudeness (John Geiger)
9. Re: High Power and Rudeness (Zach Metzinger)
10. Re: High Power and Rudeness (Zach Metzinger)
11. Re: High Power and Rudeness (Mac A. Cody)
12. Re: High Power and Rudeness (Hasan al-Basri)
----------------------------------------------------------------------
Message: 1
Date: Sun, 15 Mar 2020 13:48:08 -0500
From: Jeff Johns <jeff30339@?????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID: <0A41C6F8-6029-4C30-B950-7D21A49D9675@?????.???>
Content-Type: text/plain; charset=utf-8
Brad, are you linear capable? Here lately my daughter and I have converted
to working linear birds 95% of the time and FM 5% of the time. It?s greatly
reduced heartache and lowered stress levels. FM satellites have always been
?interesting? but since the launch of AO-91, things seem to have gotten much
worse. The general public seems to want more FM satellites, but
organizations don?t seem to be building them and getting them into orbit
fast enough to keep up with demand. There are several threads posted every
week on sites such as Reddit that mostly contain inaccurate info about using
FM satellites which leads to a lot of the problems. Maybe in the future
there will be more FM birds, until then, linear satellites offer a more
relaxing way to make some fun contacts.
Jeff WE4B
> On Mar 15, 2020, at 1:19 PM, Brad Smith via AMSAT-BB <amsat-bb@?????.???>
wrote:
>
> ?I have been working satellites since 2013. Today, I was roving on a grid
line and worked the two East birds, AO-91 and 92. After I gave out my call
and said "grid line" and gave the grids, guys tried to call me but no one
would let them in on either bird, nor let me take them. The power was so
high that my portable rig didn't have a chance. The entire pass, was this
way. I have never seen such rudeness and greed on the birds. One particular
guy dominated both passes. There was not one break at all. Is this what we
have become? A free for all? Anybody who heard me and needs the grids, pleas
email me. Brad KC9UQR grid line EN54/64.
>
> _______________________________________________
> 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: 2
Date: Sun, 15 Mar 2020 19:42:29 +0100
From: Armand SP3QFE <kontakt@??????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] KENWOOD TH-D74A
Message-ID: <1b3a7ad0e0970f1af8bd51e3c8a7296e@??????.???>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hello,
As far I know Kenwood handy radios with APRS only TH-D7A/E and TH-D72A/E
can work in duplex mode - after turn on this feature.
73, Armand SP3QFE
W dniu 2020-03-15 15:12, Gerald Witalec via AMSAT-BB napisa?(a):
> JoAnne,I believe the TH-D74A is NOT duplex receive so how is that
> working out for you contacting the SATS?
> Jerry...W8RQM
------------------------------
Message: 3
Date: Sun, 15 Mar 2020 15:00:10 -0400
From: Don KB2YSI <kb2ysi@?????.???>
To: Jeff Johns <jeff30339@?????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID:
<CAAJiE8OJWgQxaV=b-X2HxFh03oPTqP0MA5C53Ltya1Cze+f1fA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I will say that there is still some of the same issues on some linear
passes.
It is much less of an issue, but with the learning curve being what it is
on them, it does help discourage new people from learning how to operate
them.
On Sun, Mar 15, 2020 at 2:50 PM Jeff Johns via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Brad, are you linear capable? Here lately my daughter and I have converted
> to working linear birds 95% of the time and FM 5% of the time. It?s greatly
> reduced heartache and lowered stress levels. FM satellites have always been
> ?interesting? but since the launch of AO-91, things seem to have gotten
> much worse. The general public seems to want more FM satellites, but
> organizations don?t seem to be building them and getting them into orbit
> fast enough to keep up with demand. There are several threads posted every
> week on sites such as Reddit that mostly contain inaccurate info about
> using FM satellites which leads to a lot of the problems. Maybe in the
> future there will be more FM birds, until then, linear satellites offer a
> more relaxing way to make some fun contacts.
>
> Jeff WE4B
>
> > On Mar 15, 2020, at 1:19 PM, Brad Smith via AMSAT-BB <amsat-bb@?????.???>
> wrote:
> >
> > ?I have been working satellites since 2013. Today, I was roving on a
> grid line and worked the two East birds, AO-91 and 92. After I gave out my
> call and said "grid line" and gave the grids, guys tried to call me but no
> one would let them in on either bird, nor let me take them. The power was
> so high that my portable rig didn't have a chance. The entire pass, was
> this way. I have never seen such rudeness and greed on the birds. One
> particular guy dominated both passes. There was not one break at all. Is
> this what we have become? A free for all? Anybody who heard me and needs
> the grids, pleas email me. Brad KC9UQR grid line EN54/64.
> >
> > _______________________________________________
> > 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
> _______________________________________________
> 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
>
--
73,
Don KB2YSI
https://www.hamqth.com/kb2ysi
------------------------------
Message: 4
Date: Sun, 15 Mar 2020 12:01:55 -0700
From: <bernd1peters@?????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] KENWOOD TH-D74A
Message-ID: <0cc401d5fafc$32f4e330$98dea990$@?????.???>
Content-Type: text/plain; charset="utf-8"
The TH-D72 is full duplex, the TH-D74 is not. If you do APRS, the 74 can
work in full duplex mode
73,
Bernd - KB7AK
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Armand SP3QFE via
AMSAT-BB
Sent: Sunday, March 15, 2020 11:42 AM
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] KENWOOD TH-D74A
Hello,
As far I know Kenwood handy radios with APRS only TH-D7A/E and TH-D72A/E can
work in duplex mode - after turn on this feature.
73, Armand SP3QFE
W dniu 2020-03-15 15:12, Gerald Witalec via AMSAT-BB napisa?(a):
> JoAnne,I believe the TH-D74A is NOT duplex receive so how is that
> working out for you contacting the SATS?
> Jerry...W8RQM
_______________________________________________
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: 5
Date: Sun, 15 Mar 2020 15:03:29 -0400
From: Don KB2YSI <kb2ysi@?????.???>
To: Gerald Witalec <jplanner@?????????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] KENWOOD TH-D74A
Message-ID:
<CAAJiE8P_iZjt04540jVRm95xoUO_n1UMxD5z54mk+N13j6MBfg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I have logged well over a 2000 satellite QSOs all full duplex using a
TH-D74a on RX, both FM and SSB satellites.
So what is your question?
On Sun, Mar 15, 2020 at 10:13 AM Gerald Witalec via AMSAT-BB <
amsat-bb@?????.???> wrote:
> JoAnne,I believe the TH-D74A is NOT duplex receive so how is that working
> out for you contacting the SATS?
> Jerry...W8RQM
> _______________________________________________
> 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
>
--
73,
Don KB2YSI
https://www.hamqth.com/kb2ysi
------------------------------
Message: 6
Date: Sun, 15 Mar 2020 15:14:39 -0400
From: Isaac C <shorenicehere@?????.???>
To: Brad Smith <corlissbs@???.???>
Cc: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID:
<CAHHZQ2nAigVsW36rQi4qFhRyh05n8aHGTn7NUQah_DUEJUS1wQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I assume the call sign of that "one particular guy" is known. Is it
possible he doesn't know the etiquette involved? May we hope he would
appreciate a notice? I would.
Isaac
W4ITC
(5w HT, FM only so far)
On Sunday, March 15, 2020, Brad Smith via AMSAT-BB <amsat-bb@?????.???>
wrote:
> I have been working satellites since 2013. Today, I was roving on a grid
> line and worked the two East birds, AO-91 and 92. After I gave out my call
> and said "grid line" and gave the grids, guys tried to call me but no one
> would let them in on either bird, nor let me take them. The power was so
> high that my portable rig didn't have a chance. The entire pass, was this
> way. I have never seen such rudeness and greed on the birds. One particular
> guy dominated both passes. There was not one break at all. Is this what we
> have become? A free for all? Anybody who heard me and needs the grids,
> pleas email me. Brad KC9UQR grid line EN54/64.
>
> _______________________________________________
> 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: 7
Date: Sun, 15 Mar 2020 14:58:37 -0500
From: Jeff Johns <jeff30339@?????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID: <192E811A-7520-4B83-995D-F7EF68D40ABB@?????.???>
Content-Type: text/plain; charset=utf-8
To a point yes, but it?s not nearly as bad as FM. It?s not such the cost to
entry but the fact that it does take a bit more effort, especially operating
portable. Base stations with automated tuning makes life a lot easier. To be
honest, I love the challenge of doing it portable as a QRP station. Every
satellite contact for me is a thrill. For me, it?s radio for radio?s sake
and not just to get grids although those are fun as well. Hope to catch you
on a linear soon, Don, so I can send you another QSL card :)
Jeff WE4B
> On Mar 15, 2020, at 2:00 PM, Don KB2YSI <kb2ysi@?????.???> wrote:
>
> ?
> I will say that there is still some of the same issues on some linear
passes.
>
> It is much less of an issue, but with the learning curve being what it is
on them, it does help discourage new people from learning how to operate them.
>
>> On Sun, Mar 15, 2020 at 2:50 PM Jeff Johns via AMSAT-BB
<amsat-bb@?????.???> wrote:
>> Brad, are you linear capable? Here lately my daughter and I have
converted to working linear birds 95% of the time and FM 5% of the time.
It?s greatly reduced heartache and lowered stress levels. FM satellites have
always been ?interesting? but since the launch of AO-91, things seem to have
gotten much worse. The general public seems to want more FM satellites, but
organizations don?t seem to be building them and getting them into orbit
fast enough to keep up with demand. There are several threads posted every
week on sites such as Reddit that mostly contain inaccurate info about using
FM satellites which leads to a lot of the problems. Maybe in the future
there will be more FM birds, until then, linear satellites offer a more
relaxing way to make some fun contacts.
>>
>> Jeff WE4B
>>
>> > On Mar 15, 2020, at 1:19 PM, Brad Smith via AMSAT-BB
<amsat-bb@?????.???> wrote:
>> >
>> > ?I have been working satellites since 2013. Today, I was roving on a
grid line and worked the two East birds, AO-91 and 92. After I gave out my
call and said "grid line" and gave the grids, guys tried to call me but no
one would let them in on either bird, nor let me take them. The power was so
high that my portable rig didn't have a chance. The entire pass, was this
way. I have never seen such rudeness and greed on the birds. One particular
guy dominated both passes. There was not one break at all. Is this what we
have become? A free for all? Anybody who heard me and needs the grids, pleas
email me. Brad KC9UQR grid line EN54/64.
>> >
>> > _______________________________________________
>> > 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
>> _______________________________________________
>> 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
>
>
> --
> 73,
> Don KB2YSI
> https://www.hamqth.com/kb2ysi
------------------------------
Message: 8
Date: Sun, 15 Mar 2020 16:43:58 -0500
From: John Geiger <af5cc2@?????.???>
To: Jeff Johns <jeff30339@?????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID:
<CAHC1P2-wP2-ugyh24qoeFSS3an+EmZfzYtt6qevDyVBmWVXFqQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Most of the newer linear satellites have a 20khz passband so more than 1
QSO can take place at a time. Some of the older ones like FO29 and AO7 can
handle dozens of QSOs at once.
I have been on the satellites off and on since 2002 and the FM satellites
didn't use to be this much of a mess.
73 John W5TD
On Sun, Mar 15, 2020 at 3:01 PM Jeff Johns via AMSAT-BB <amsat-bb@?????.???>
wrote:
> To a point yes, but it?s not nearly as bad as FM. It?s not such the cost
> to entry but the fact that it does take a bit more effort, especially
> operating portable. Base stations with automated tuning makes life a lot
> easier. To be honest, I love the challenge of doing it portable as a QRP
> station. Every satellite contact for me is a thrill. For me, it?s radio for
> radio?s sake and not just to get grids although those are fun as well. Hope
> to catch you on a linear soon, Don, so I can send you another QSL card :)
>
> Jeff WE4B
>
> > On Mar 15, 2020, at 2:00 PM, Don KB2YSI <kb2ysi@?????.???> wrote:
> >
> > ?
> > I will say that there is still some of the same issues on some linear
> passes.
> >
> > It is much less of an issue, but with the learning curve being what it
> is on them, it does help discourage new people from learning how to operate
> them.
> >
> >> On Sun, Mar 15, 2020 at 2:50 PM Jeff Johns via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >> Brad, are you linear capable? Here lately my daughter and I have
> converted to working linear birds 95% of the time and FM 5% of the time.
> It?s greatly reduced heartache and lowered stress levels. FM satellites
> have always been ?interesting? but since the launch of AO-91, things seem
> to have gotten much worse. The general public seems to want more FM
> satellites, but organizations don?t seem to be building them and getting
> them into orbit fast enough to keep up with demand. There are several
> threads posted every week on sites such as Reddit that mostly contain
> inaccurate info about using FM satellites which leads to a lot of the
> problems. Maybe in the future there will be more FM birds, until then,
> linear satellites offer a more relaxing way to make some fun contacts.
> >>
> >> Jeff WE4B
> >>
> >> > On Mar 15, 2020, at 1:19 PM, Brad Smith via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >> >
> >> > ?I have been working satellites since 2013. Today, I was roving on a
> grid line and worked the two East birds, AO-91 and 92. After I gave out my
> call and said "grid line" and gave the grids, guys tried to call me but no
> one would let them in on either bird, nor let me take them. The power was
> so high that my portable rig didn't have a chance. The entire pass, was
> this way. I have never seen such rudeness and greed on the birds. One
> particular guy dominated both passes. There was not one break at all. Is
> this what we have become? A free for all? Anybody who heard me and needs
> the grids, pleas email me. Brad KC9UQR grid line EN54/64.
> >> >
> >> > _______________________________________________
> >> > 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
> >> _______________________________________________
> >> 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
> >
> >
> > --
> > 73,
> > Don KB2YSI
> > https://www.hamqth.com/kb2ysi
> _______________________________________________
> 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: 9
Date: Sun, 15 Mar 2020 16:48:23 -0500
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID: <cf788a67-6f94-b05d-02f3-93b5a148e7d4@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 03/15/20 13:48, Jeff Johns via AMSAT-BB wrote:
> The general public seems to want more FM satellites, but organizations
don?t seem to be building them and getting them into orbit fast enough to
keep up with demand.
The single-channel, repeater-in-the-sky model was always destined for
this sort of abuse (or simple ignorance). I've seen this happen on a
local repeater, with a footprint of less than 50 miles. Why wouldn't it
be expected on something with a footprint 100-1000 times as large?
Hams clamor for FM satellites because it reduces the cost of user
equipment. Beofeng hasn't yet come out with a $30 2m/440 all-mode HT.
Linear satellites would work better for capacity, and better utilize the
amount of bandwidth "lifted" to orbit by a launch vehicle. However,
AMSAT can't alienate the $30 FM users, so it is a delicate balance.
Adding a linear transponder right alongside the FM card might work, but
that incurs additional solar/power requirements which drives up system
complexity, cost, testing, etc.
There are many variables, and it is impossible to optimize for them all.
That's the engineering trade-off that I imagine AMSAT must face.
Here are a few of my thoughts:
Some enterprising soul should design, using common, off-the-shelf ICs, a
simple PCB that is a SSB/CW 2m/440 duplex radio. Make the plans
available freely on the WWW, etc. Get a groundswell behind it, and then
watch the Asian clone makers swoop in and commercialize it (while also
optimizing every last penny spent). Presto, lots of 2m/440 linear
operators. Worked for nanoVNA, mikrocontroller's transistortester, etc.
Should work for our crowd.
Also, donate early, donate often to AMSAT. Building, testing, and
launching satellites isn't cheap, and your donations help put more birds
into space.
"Cheap, fast, good. Pick any two."
--- Zach
N0ZGO
------------------------------
Message: 10
Date: Sun, 15 Mar 2020 16:56:30 -0500
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID: <b8fdbe02-4caf-6904-0ec9-f814858a78ae@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 03/15/20 16:48, Zach Metzinger via AMSAT-BB wrote:
> The single-channel, repeater-in-the-sky model was always destined for
> this sort of abuse (or simple ignorance). I've seen this happen on a
> local repeater, with a footprint of less than 50 miles. Why wouldn't it
> be expected on something with a footprint 100-1000 times as large?
(*) slight correction -- Earth has a radius of ~3963 miles, so my
"100-1000 times" statement was a little superlative. Let's go with
10-100 times. ;-)
--- Zach
N0ZGO
------------------------------
Message: 11
Date: Sun, 15 Mar 2020 17:52:32 -0500
From: "Mac A. Cody" <maccody@???.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID: <ee520d83-c9f5-f415-800e-ad2abf78aa69@???.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Zach,
I've been contemplating a single band, transmit-only version of the
QCX-SSB, developed by Guido PE1NNZ:
??? QCX-SSB: SSB with your QCX transceiver (modification)
??? https://github.com/threeme3/QCX-SSB
This is based on his work on Class-E driven SSB transceiver:
??? Direct SSB generation by frequency modulating a PLL:
http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll.html
I saw something similar that was being done with a Teensy board, but
that link appears to have broken.
I don't see a reason why this couldn't be adapted to 2m/70cm band
operation by replacing the SI5351 PLL with one of the high-
frequency versions of an SI570 PLL and a higher-frequency Class-E
amplifier.? I would keep it simple by having the transmitter filter
for either 70cm or 2m.? SSB reception could be done with any number
of analog or SDR receivers.
I wish I had the time to work on this idea.
73,
Mac Cody / AE5PH
On 3/15/20 4:48 PM, Zach Metzinger via AMSAT-BB wrote:
> On 03/15/20 13:48, Jeff Johns via AMSAT-BB wrote:
>
> Here are a few of my thoughts:
>
> Some enterprising soul should design, using common, off-the-shelf ICs,
> a simple PCB that is a SSB/CW 2m/440 duplex radio. Make the plans
> available freely on the WWW, etc. Get a groundswell behind it, and
> then watch the Asian clone makers swoop in and commercialize it (while
> also optimizing every last penny spent). Presto, lots of 2m/440 linear
> operators. Worked for nanoVNA, mikrocontroller's transistortester,
> etc. Should work for our crowd.
>
>
> --- Zach
> N0ZGO
> _______________________________________________
> 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!
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Message: 12
Date: Sun, 15 Mar 2020 18:34:07 -0500
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: Zach Metzinger <zmetzing@?????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] High Power and Rudeness
Message-ID:
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Linear birds have more room but are being compromised significantly by poor
receiving setups (low sensitivity) and transmitting with too much power, to
be sure. (see my other post on this issue).
An additional problem that is causing just as much trouble on the linear
birds is *failing to use doppler correction properly*. People come on and
slide all over the passband and can't find themselves. Once they do, they
cannot maintain a stable frequency relationship with respect to others on
the birds.
As a result, they occupy multiple frequencies during the pass, covering up
existing qsos that are practicing proper doppler discipline. *Basically, we
are going through a period of transition where new operators have no idea
what they are doing because they came from a single channel FM environment
where doppler was practically non-existent, and making oneself as "full
quieting" as possible has been rewarded with "yet another grid". *
The FM birds make 20 meter DX'ing seem like a picnic of social workers,
especially on the weekends.
These FM birds encouraged and basically trained people into some horrible
operating practices and at the same time failed to educate those same
people how much different linear bird operation needs to be.
We need more Elmers. We need to provide feedback. When we observe these
poor practices, we need to:
1. Look up their email (QRZ if available does nicely)
2. Write them a helpful note that explains: (in a straightforward, yet
polite fashion)
a. What the problem is.
b. Why it's problem
c. How to cure it
d. What the consequences are for the other ops and eventually for
themselves if they continue to operate in these objectionable ways.
I do this a few times a week and include a link to an MP4 recording of the
offending operation, so they can see and hear what their operating
practices are doing t everyone else.
Let's lend a helping hand by making the extra effort to educate our fellow
sat ops, so that this wonderful resource of linear birds is not turned into
the wasteland that the FM birds have become (on weekends).
Who knows, it might help the FM birds as well.
73, N0AN
Hasan
On Sun, Mar 15, 2020, 4:58 PM Zach Metzinger via AMSAT-BB <
amsat-bb@?????.???> wrote:
> On 03/15/20 16:48, Zach Metzinger via AMSAT-BB wrote:
> > The single-channel, repeater-in-the-sky model was always destined for
> > this sort of abuse (or simple ignorance). I've seen this happen on a
> > local repeater, with a footprint of less than 50 miles. Why wouldn't it
> > be expected on something with a footprint 100-1000 times as large?
>
> (*) slight correction -- Earth has a radius of ~3963 miles, so my
> "100-1000 times" statement was a little superlative. Let's go with
> 10-100 times. ;-)
>
> --- Zach
> N0ZGO
> _______________________________________________
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> expressed
> are solely those of the author, and do not reflect the official views of
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Subject: Digest Footer
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Sent via amsat-bb@?????.???.
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without requiring membership. Opinions expressed
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AMSAT-NA.
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End of AMSAT-BB Digest, Vol 15, Issue 82
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