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CX2SA > SATDIG 23.07.20 02:57l 831 Lines 29780 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: HEO (Jeff Johns)
2. Fwd: [50MHzandUp] Fwd: Fw: COVID-19 Microwave Inactivation
Research - Parts needed (Joe Leikhim)
3. Re: HEO (Burns Fisher)
4. Re: AO-92 L/v (Andrew Glasbrenner)
5. Is This AMSAT's Future? (Joe Leikhim)
6. Re: HEO (David Worboys)
7. RS-44 contact with HI sta (christy hunter)
8. QO-100 LNB (Ev Tupis)
9. Re: QO-100 LNB (Bruce Perens)
10. Filters (Brad Brooks WF7T)
----------------------------------------------------------------------
Message: 1
Date: Wed, 22 Jul 2020 16:37:18 -0500
From: Jeff Johns <jeff30339@?????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HEO
Message-ID: <1A0C036F-DA9B-4B5D-AB70-A99ADF2B0CC1@?????.???>
Content-Type: text/plain; charset=utf-8
Once activated, there is a 24 hour timer for the satellite to remain in L/v
mode.
Jeff WE4B
> On Jul 22, 2020, at 3:56 PM, David Worboys via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?Following on from Patrick?s post (below), I just got home and checked to
find that the first AO-92 pass for me is at 23:13 edt tonight which, as I
have to get up at 3.15am for work, is a definite no-no!
>
> What is the reason for L/U to be only switched on for just a 24 hour
period and during the work week? Is it automatically switched back or does
the command station do it? If that latter, can it be left on for say, 48
hours to give operators a better chance of working L band or moved to a
weekend slot? What with the non activity last week I think its been about
three weeks since the last time I could use Mode L and whilst I appreciate
that there are a lot of people who want to use that mode, opening up the
ability would give a greater number of operators the opportunity.
>
> If the 24 hour period is the maximum available to preserve the health of
the satellite then I understand but I would be interested in knowing the
rationale!
>
> Many thanks
>
> 73
>
> David
> KG4ZLB
>
>
>
>
>
>
> On Jul 22, 2020, at 1:30 PM, Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> Hi Andrew!
>
> I am all for a variety of satellites. When we had AO-51 in the 2000s, I
> found the pieces to work its V/S FM repeater as I started working
> satellites. Doppler at 2.4 GHz made tuning those downlinks an almost
> constant thing on those passes, but it was fun. We have the sort of
> transponder you mentioned in your post with AO-92's L/V FM repeater
> right now. We are only permitted to use the 1.2 GHz band for satellite
> uplinks, not downlinks.
>
> Many satellite operators now have the 1.2 GHz uplink capability with
> the IC-9700, but the only time AO-92 L/V is available appears to be
> inconvenient for many who might want to try it right now (Tuesday
> evenings and Wednesday mornings in North America). We were told that
> the switch from a Sunday UTC activation (Saturday nights and Sunday
> mornings in North America) last year was not going to be a permanent
> change. I think there would be more new call signs heard on AO-92 L/V
> with those IC-9700s and other radios, if that mode was available at a
> more convenient time for those who have work or school commitments
> during the week. It isn't like we lack V/U or U/V FM satellites right
> now.
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
> Twitter: @?????? or http://twitter.com/WD9EWK
>
>
>
>
>
>
>
>
>
>> On Wed, Jul 22, 2020 at 4:46 PM Andrew Lazenby via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>>
>> Hello EveryoneI recently joined Amsat because I felt like a bit of a
>> hypocrite for complaining about things, and not doing my part to change
>> them. One thing that does bug me is the HEO satellites having microwave
>> uplinks and downlinks. I think that will greatly limit the clientele that
>> will be able to use these.
>> I have head many older hams gripe about LEO satellites and reflect back
>> on how back in the day there would be passes up for hours! Many of them
>> where using drifty transverters with terrible noise figures, turning
>> antennas with tv rotators and no preamp! The argument that I have heard to
>> move to mircowave uplinks and downlinks is lower noise, but if it worked
>> with them back then, then what's changed?
>> Something else to consider is that the microwave spectrum is under fire
>> from commercial interest more and more. Why not consider like a U/L or L/U
>> transponder? That would bring the envelope a little closer to where the
>> average ham could operate with out investing in some serious equipment,
>> while keeping the dream of HEO alive for the large percentage of satellite
>> operators, and not just a handful?
>> Forgive me if Im wrong, but I just wanted to put my 2 cents in the pot. If
>> we all would learn to work together as much as we fuss we would be making
>> some tracks. Thanks everyone, Andrew N4LAZ
>>
>>
> _______________________________________________
> 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
------------------------------
Message: 2
Date: Wed, 22 Jul 2020 17:42:00 -0400
From: Joe Leikhim <rhyolite@???????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Fwd: [50MHzandUp] Fwd: Fw: COVID-19 Microwave
Inactivation Research - Parts needed
Message-ID: <156a8f9d-230a-094a-566a-be92b419f800@???????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
That is pretty cool. I was thinking about a hat or a pendent that would use
ions to deflect or attract plumes of virus and safely contain them. A dome
of protection of sorts just a wild idea..
"This just came across the m/wave club's reflector. Nothing to do with
satcomms but it is amateur radio m/wave content.
?___
Sent from my two way wrist watch
73 de W3AB/GEO?"
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
JLeikhim@???????.???
407-982-0446
WWW.LEIKHIM.COM
------------------------------
Message: 3
Date: Wed, 22 Jul 2020 17:51:51 -0400
From: Burns Fisher <wb1fj-bb@??????.??>
To: David Worboys <kg4zlb@??????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HEO
Message-ID:
<CABX7KxViiZVuS+o3RHd_9FnBvSOcVJymvBCKT-ECahUgydeOnQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
As the volunteer who wrote the code that does it, I can tell you with
certainty that when AO-92 is switched to L-band it turns off in 24 hours
automatically (or sooner if the satellite goes into safe mode, resets, or
is commanded to UHF). The time was chosen just because of the
uncertainties. Would L-band work? Would anyone use it? Will the power use
be prohibitive (analysis said it was ok, but...) The time is hard-coded
in. It would have been nice to be able to change it by command, but the
entire design of the original Foxes were based on a lot of uncertainty.
There was not much time to change after some certainty was gained after the
first launch or 2, so that capability is not available. Fox-1e is an
improvement over the previous Foxes. HuskySat was an improvement over
that. (Despite the opposite launch order). And Golf will be a big
improvement over both, in all cases because of what we learned from the
earlier satellites and the extra time available.
As to the day that it is switched, that's outside of my pay grade :-)
73,
Burns WB1FJ
On Wed, Jul 22, 2020 at 4:56 PM David Worboys via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Following on from Patrick?s post (below), I just got home and checked to
> find that the first AO-92 pass for me is at 23:13 edt tonight which, as I
> have to get up at 3.15am for work, is a definite no-no!
>
> What is the reason for L/U to be only switched on for just a 24 hour
> period and during the work week? Is it automatically switched back or does
> the command station do it? If that latter, can it be left on for say, 48
> hours to give operators a better chance of working L band or moved to a
> weekend slot? What with the non activity last week I think its been about
> three weeks since the last time I could use Mode L and whilst I appreciate
> that there are a lot of people who want to use that mode, opening up the
> ability would give a greater number of operators the opportunity.
>
> If the 24 hour period is the maximum available to preserve the health of
> the satellite then I understand but I would be interested in knowing the
> rationale!
>
> Many thanks
>
> 73
>
> David
> KG4ZLB
>
>
>
>
>
>
> On Jul 22, 2020, at 1:30 PM, Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB
> <amsat-bb@?????.???> wrote:
>
> Hi Andrew!
>
> I am all for a variety of satellites. When we had AO-51 in the 2000s, I
> found the pieces to work its V/S FM repeater as I started working
> satellites. Doppler at 2.4 GHz made tuning those downlinks an almost
> constant thing on those passes, but it was fun. We have the sort of
> transponder you mentioned in your post with AO-92's L/V FM repeater
> right now. We are only permitted to use the 1.2 GHz band for satellite
> uplinks, not downlinks.
>
> Many satellite operators now have the 1.2 GHz uplink capability with
> the IC-9700, but the only time AO-92 L/V is available appears to be
> inconvenient for many who might want to try it right now (Tuesday
> evenings and Wednesday mornings in North America). We were told that
> the switch from a Sunday UTC activation (Saturday nights and Sunday
> mornings in North America) last year was not going to be a permanent
> change. I think there would be more new call signs heard on AO-92 L/V
> with those IC-9700s and other radios, if that mode was available at a
> more convenient time for those who have work or school commitments
> during the week. It isn't like we lack V/U or U/V FM satellites right
> now.
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
> Twitter: @?????? or http://twitter.com/WD9EWK
>
>
>
>
>
>
>
>
>
> On Wed, Jul 22, 2020 at 4:46 PM Andrew Lazenby via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
> > Hello EveryoneI recently joined Amsat because I felt like a bit of a
> > hypocrite for complaining about things, and not doing my part to change
> > them. One thing that does bug me is the HEO satellites having microwave
> > uplinks and downlinks. I think that will greatly limit the clientele that
> > will be able to use these.
> > I have head many older hams gripe about LEO satellites and reflect back
> > on how back in the day there would be passes up for hours! Many of them
> > where using drifty transverters with terrible noise figures, turning
> > antennas with tv rotators and no preamp! The argument that I have heard
> to
> > move to mircowave uplinks and downlinks is lower noise, but if it worked
> > with them back then, then what's changed?
> > Something else to consider is that the microwave spectrum is under fire
> > from commercial interest more and more. Why not consider like a U/L or
> L/U
> > transponder? That would bring the envelope a little closer to where the
> > average ham could operate with out investing in some serious equipment,
> > while keeping the dream of HEO alive for the large percentage of
> satellite
> > operators, and not just a handful?
> > Forgive me if Im wrong, but I just wanted to put my 2 cents in the pot.
> If
> > we all would learn to work together as much as we fuss we would be making
> > some tracks. Thanks everyone, Andrew N4LAZ
> >
> >
> _______________________________________________
> 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
>
------------------------------
Message: 4
Date: Wed, 22 Jul 2020 18:11:07 -0400
From: "Andrew Glasbrenner" <glasbrenner@??????????.???>
To: "'Mark L. Hammond'" <marklhammond@?????.???>, "'David Worboys'"
<kg4zlb@??????.???>
Cc: 'AMSAT BB' <amsat-bb@?????.???>
Subject: Re: [amsat-bb] AO-92 L/v
Message-ID: <003f01d66075$00d138c0$0273aa40$@??????????.???>
Content-Type: text/plain; charset="UTF-8"
Hi David,
Mark is correct. We did several polls, and they all came back to keep it
where it is. The results were 2 to 1 and 3 to 1 in the two polls AMSAT did
on FB and Twitter. There are other factors at play, but Tuesday night L/v
seems to be the clear majority preference.
If ESEO is ever placed in amateur service, that will be an additional L band
resource. Golf-TEE and Golf-1 will also have L band uplink capability with
the 10GHz downlink.
73, Drew KO4MA
AMSAT VP Operations
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Mark L. Hammond via
AMSAT-BB
Sent: Wednesday, July 22, 2020 5:17 PM
To: David Worboys <kg4zlb@??????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HEO
Hi David,
The L-band receiver setup is on a 24 hour timer (unless the satellite resets
due to SAA or low battery voltage before the timer is up!).
As I recall, we did a pretty good poll via social media (FB, Twitter if I
recall) and Wednesday UTC was the top pick.
Mark L. Hammond [N8MH]
AMSAT Director and Command Station
On Wed, Jul 22, 2020 at 4:54 PM David Worboys via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Following on from Patrick?s post (below), I just got home and checked
> to find that the first AO-92 pass for me is at 23:13 edt tonight
> which, as I have to get up at 3.15am for work, is a definite no-no!
>
> What is the reason for L/U to be only switched on for just a 24 hour
> period and during the work week? Is it automatically switched back or
> does the command station do it? If that latter, can it be left on for
> say, 48 hours to give operators a better chance of working L band or
> moved to a weekend slot? What with the non activity last week I think
> its been about three weeks since the last time I could use Mode L and
> whilst I appreciate that there are a lot of people who want to use
> that mode, opening up the ability would give a greater number of operators
the opportunity.
>
> If the 24 hour period is the maximum available to preserve the health
> of the satellite then I understand but I would be interested in
> knowing the rationale!
>
> Many thanks
>
> 73
>
> David
> KG4ZLB
>
>
>
>
>
>
> On Jul 22, 2020, at 1:30 PM, Patrick STODDARD (WD9EWK/VA7EWK) via
> AMSAT-BB <amsat-bb@?????.???> wrote:
>
> Hi Andrew!
>
> I am all for a variety of satellites. When we had AO-51 in the 2000s,
> I found the pieces to work its V/S FM repeater as I started working
> satellites. Doppler at 2.4 GHz made tuning those downlinks an almost
> constant thing on those passes, but it was fun. We have the sort of
> transponder you mentioned in your post with AO-92's L/V FM repeater
> right now. We are only permitted to use the 1.2 GHz band for satellite
> uplinks, not downlinks.
>
> Many satellite operators now have the 1.2 GHz uplink capability with
> the IC-9700, but the only time AO-92 L/V is available appears to be
> inconvenient for many who might want to try it right now (Tuesday
> evenings and Wednesday mornings in North America). We were told that
> the switch from a Sunday UTC activation (Saturday nights and Sunday
> mornings in North America) last year was not going to be a permanent
> change. I think there would be more new call signs heard on AO-92 L/V
> with those IC-9700s and other radios, if that mode was available at a
> more convenient time for those who have work or school commitments
> during the week. It isn't like we lack V/U or U/V FM satellites right
> now.
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
> Twitter: @?????? or http://twitter.com/WD9EWK
>
>
>
>
>
>
>
>
>
> On Wed, Jul 22, 2020 at 4:46 PM Andrew Lazenby via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
> > Hello EveryoneI recently joined Amsat because I felt like a bit of a
> > hypocrite for complaining about things, and not doing my part to
> > change them. One thing that does bug me is the HEO satellites having
> > microwave uplinks and downlinks. I think that will greatly limit the
> > clientele that will be able to use these.
> > I have head many older hams gripe about LEO satellites and reflect
> > back on how back in the day there would be passes up for hours! Many
> > of them where using drifty transverters with terrible noise figures,
> > turning antennas with tv rotators and no preamp! The argument that I
> > have heard
> to
> > move to mircowave uplinks and downlinks is lower noise, but if it
> > worked with them back then, then what's changed?
> > Something else to consider is that the microwave spectrum is under
> > fire from commercial interest more and more. Why not consider like a
> > U/L or
> L/U
> > transponder? That would bring the envelope a little closer to where
> > the average ham could operate with out investing in some serious
> > equipment, while keeping the dream of HEO alive for the large
> > percentage of
> satellite
> > operators, and not just a handful?
> > Forgive me if Im wrong, but I just wanted to put my 2 cents in the pot.
> If
> > we all would learn to work together as much as we fuss we would be
> > making some tracks. Thanks everyone, Andrew N4LAZ
> >
> >
> _______________________________________________
> 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
>
_______________________________________________
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: Wed, 22 Jul 2020 12:06:34 -0400
From: Joe Leikhim <rhyolite@???????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Is This AMSAT's Future?
Message-ID: <de0761b0-1b3a-6c31-ba03-3e7d09589e48@???????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Why not? QO-100 is a success. The antennas for up link and downlink for such
a station are easily made or procured. The LNB a simple decades old
modification. The stations would be friendly to HOA and apartment dwellers
alike. I dont see the objection.
"These new projects - seems like they are ?marketed? towards a very small
segment os satellite operators.
Is there truly a worthwhile ?return on investment" when a ground station
might have to include ?
? ? radio system is a 10 GHz downlink that will support 1 Mbps.
You'll need a 10 GHz antenna that can be steered to track a LEO
satellite and probably a low-noise block downconverter (LNB)
feeding an SDR. I think similar receivers are used for QO-100,
so a Google search may yield some designs that are currently
working, although QO-100 is nearly stationary ? ?
Feels like a very few hams will partake ? Exciting, indeed. But surely
not geared to the masses ?
Clint Bradford K6LCS"
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
JLeikhim@???????.???
407-982-0446
WWW.LEIKHIM.COM
------------------------------
Message: 6
Date: Wed, 22 Jul 2020 18:31:16 -0400
From: David Worboys <kg4zlb@??????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] HEO
Message-ID: <9E9A8DC7-08A0-484C-B9B9-D02C2A0FE794@??????.???>
Content-Type: text/plain; charset=utf-8
Many thanks for the ?on" BB responses and the ones sent directly to me - I
have a better understanding of this now and I am grateful for your time in
explaining it!
Best wishes
David
KG4ZLB
On Jul 22, 2020, at 5:37 PM, Jeff Johns via AMSAT-BB <amsat-bb@?????.???>
wrote:
Once activated, there is a 24 hour timer for the satellite to remain in L/v
mode.
Jeff WE4B
> On Jul 22, 2020, at 3:56 PM, David Worboys via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?Following on from Patrick?s post (below), I just got home and checked to
find that the first AO-92 pass for me is at 23:13 edt tonight which, as I
have to get up at 3.15am for work, is a definite no-no!
>
> What is the reason for L/U to be only switched on for just a 24 hour
period and during the work week? Is it automatically switched back or does
the command station do it? If that latter, can it be left on for say, 48
hours to give operators a better chance of working L band or moved to a
weekend slot? What with the non activity last week I think its been about
three weeks since the last time I could use Mode L and whilst I appreciate
that there are a lot of people who want to use that mode, opening up the
ability would give a greater number of operators the opportunity.
>
> If the 24 hour period is the maximum available to preserve the health of
the satellite then I understand but I would be interested in knowing the
rationale!
>
> Many thanks
>
> 73
>
> David
> KG4ZLB
>
>
>
>
>
>
> On Jul 22, 2020, at 1:30 PM, Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> Hi Andrew!
>
> I am all for a variety of satellites. When we had AO-51 in the 2000s, I
> found the pieces to work its V/S FM repeater as I started working
> satellites. Doppler at 2.4 GHz made tuning those downlinks an almost
> constant thing on those passes, but it was fun. We have the sort of
> transponder you mentioned in your post with AO-92's L/V FM repeater
> right now. We are only permitted to use the 1.2 GHz band for satellite
> uplinks, not downlinks.
>
> Many satellite operators now have the 1.2 GHz uplink capability with
> the IC-9700, but the only time AO-92 L/V is available appears to be
> inconvenient for many who might want to try it right now (Tuesday
> evenings and Wednesday mornings in North America). We were told that
> the switch from a Sunday UTC activation (Saturday nights and Sunday
> mornings in North America) last year was not going to be a permanent
> change. I think there would be more new call signs heard on AO-92 L/V
> with those IC-9700s and other radios, if that mode was available at a
> more convenient time for those who have work or school commitments
> during the week. It isn't like we lack V/U or U/V FM satellites right
> now.
>
> 73!
>
>
>
>
>
> Patrick WD9EWK/VA7EWK
> http://www.wd9ewk.net/
> Twitter: @?????? or http://twitter.com/WD9EWK
>
>
>
>
>
>
>
>
>
>> On Wed, Jul 22, 2020 at 4:46 PM Andrew Lazenby via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>>
>> Hello EveryoneI recently joined Amsat because I felt like a bit of a
>> hypocrite for complaining about things, and not doing my part to change
>> them. One thing that does bug me is the HEO satellites having microwave
>> uplinks and downlinks. I think that will greatly limit the clientele that
>> will be able to use these.
>> I have head many older hams gripe about LEO satellites and reflect back
>> on how back in the day there would be passes up for hours! Many of them
>> where using drifty transverters with terrible noise figures, turning
>> antennas with tv rotators and no preamp! The argument that I have heard to
>> move to mircowave uplinks and downlinks is lower noise, but if it worked
>> with them back then, then what's changed?
>> Something else to consider is that the microwave spectrum is under fire
>> from commercial interest more and more. Why not consider like a U/L or L/U
>> transponder? That would bring the envelope a little closer to where the
>> average ham could operate with out investing in some serious equipment,
>> while keeping the dream of HEO alive for the large percentage of satellite
>> operators, and not just a handful?
>> Forgive me if Im wrong, but I just wanted to put my 2 cents in the pot. If
>> we all would learn to work together as much as we fuss we would be making
>> some tracks. Thanks everyone, Andrew N4LAZ
>>
>>
> _______________________________________________
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> _______________________________________________
> 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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_______________________________________________
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: Wed, 22 Jul 2020 16:20:21 -0700
From: christy hunter <cchunter3@??????????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] RS-44 contact with HI sta
Message-ID: <a98d7f84-d848-6e4d-2a00-32b499cff94b@??????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
just had contact ( 2300ISH UTC) with Robert, NH7WN, on RS44 for those
shooting for HI.
73 Christy KB6LTY DM14
------------------------------
Message: 8
Date: Wed, 22 Jul 2020 23:34:29 +0000 (UTC)
From: Ev Tupis <w2ev@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] QO-100 LNB
Message-ID: <646972852.5803377.1595460869291@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Does the LNB have a dielectric lens on it?? I can't tell from the pictures
(and I'm looking to experiment with dielectric lenses...and am looking for
an inexpensive source).
Ev, W2EV
Rochester VHF Group
------------------------------
Message: 9
Date: Wed, 22 Jul 2020 17:08:30 -0700
From: Bruce Perens <bruce@??????.???>
To: Ev Tupis <w2ev@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] QO-100 LNB
Message-ID:
<CAK2MWOvn+43ncLpNhDEujAGwwW-FXgKbnjA71xYzXeOcZh=54A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
On Wed, Jul 22, 2020 at 4:35 PM Ev Tupis via AMSAT-BB <amsat-bb@?????.???>
wrote:
> I'm looking to experiment with dielectric lenses...and am looking for an
> inexpensive source).
There are a lot of papers online about making them from parrafin.
------------------------------
Message: 10
Date: Wed, 22 Jul 2020 17:54:59 -0500
From: Brad Brooks WF7T <brad.wf7t@?????.???>
To: bruninga@????.???? amsat-bb@?????.???
Subject: [amsat-bb] Filters
Message-ID: <5bfaa0f1-07b7-4759-a5d0-d0cb3516a686@?????>
Content-Type: text/plain; charset="utf-8"
Bob, first...I hope you feel better quickly. Second, have you seen this?
http://www.w1ghz.org/filter/Combline_Filters_for_VHF_and_UHF.pdf
73 Brad WF7T
------------------------------
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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Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 292
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