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CX2SA > SATDIG 06.08.15 12:37l 964 Lines 34286 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Where can I purchase an arrow antenna in Europe? (EC4TR Luis)
2. Re: CAMSAT Frequency chaos (Edson W. R. Pereira)
3. Re: CAMSAT Frequency chaos (Graham Shirville)
4. Re: Screw threads on Arrow? (Ted)
5. Re: Screw threads on Arrow? (KO6TZ Bob)
6. SPROUT Deployable Membrane ? Request for Telemetry (M5AKA)
7. Re: SPROUT Deployable Membrane ? Request for Telemetry (Ted)
8. Re: new sats and 23cm (Greg Dolkas)
9. Re: new sats and 23cm (Paul Stoetzer)
10. Re: SPROUT Deployable Membrane ? Request for Telemetry (Bob KD7YZ)
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Aug 2015 22:20:52 +0200
From: EC4TR Luis <ec4tr.luis@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Where can I purchase an arrow antenna in Europe?
Message-ID: <55C27024.1010501@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi guys
I've always liked the arrow antenna for field trips, I wonder if it is
sold in Europe.
73 Luis
EC4TR
------------------------------
Message: 2
Date: Wed, 5 Aug 2015 17:21:39 -0300
From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] CAMSAT Frequency chaos
Message-ID:
<CALNQy4-bi0Dm14aaiTEVEsDZekO=cEQi6m72dB7h17KTZcsGcw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Amateur satellites operating outside the allocated sub-bands is a very
unfortunate and bad precedent. Radio Amateurs from different countries and
different IARU regions spend years negotiating bandplans so that we can all
operate in harmony without causing interference to other amateurs.
The 2m band is indeed crowded, but we do have practically desert bands
above 70cm that so badly need activity. Not only the bands are available,
but we *need* to use them. Otherwise we will lose them.
73, Edson PY2SDR
---
- We humans have the capability to do amazing things if we work together.
- N?s seres humanos temos a capacidade de fazer coisas incr?veis se
trabalharmos juntos.
On Wed, Aug 5, 2015 at 2:32 PM, Paul Stoetzer <n8hm@xxxx.xxx> wrote:
> Hit send before I could attach the last link, for the CAS-3
> coordination request.
>
> http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=458
>
> 73,
>
> Paul, N8HM
>
>
> On Wed, Aug 5, 2015 at 1:32 PM, Paul Stoetzer <n8hm@xxxx.xxx> wrote:
> > The CAMSAT filing you referenced is for the CAS-2 series not yet
> > scheduled for a launch, not the CAS-3 series on this launch.
> >
> > LilacSat-2 has other frequencies coordinated:
> >
> > http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=395
> >
> > The CAS-3 series is pending coordination here:
> >
> >
> >
> >
> > On Wed, Aug 5, 2015 at 1:27 PM, Patrick STODDARD (WD9EWK/VA7EWK)
> > <amsat-bb@xxxxxx.xxx> wrote:
> >> David,
> >>
> >> I noticed the frequency selections for all of those satellites. It is
> nice
> >> that we may have 6 transponders that don't have overlapping frequencies,
> >> which could make for some interesting times ("Which of the 6 will you be
> >> on?" - for example). Seeing how some of those downlinks are at and below
> >> 145.800 MHz could cause many new issues with terrestrial and (for
> >> 145.800 MHz) other space operations. Also seeing APRS at 144.390 MHz
> >> (North American APRS frequency) and an FM uplink at 144.350 MHz on
> >> LilacSat-2 (CAS-3H) won't make some any happier.
> >>
> >> CAMSAT filed for IARU frequency coordination in 2012:
> >>
> >> http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=264
> >>
> >> but it doesn't appear to have gone anywhere past the filing step. I did
> not
> >> see frequencies listed on that web page, nor did I see the CAMSAT
> satellites
> >> anywhere else on that site. I can only guess the Chinese licensing
> >> authorities are making full use of the 144-146 MHz range that is
> permitted
> >> under the international (ITU) radio regulations for amateur satellite
> >> operation, regardless of the voluntary bandplans observed around the
> >> world.
> >>
> >> 73!
> >>
> >>
> >>
> >>
> >> Patrick WD9EWK/VA7EWK
> >> http://www.wd9ewk.net/
> >> Twitter: @xxxxxx
> >>
> >>
> >>
> >> On Wed, Aug 5, 2015 at 10:00 AM, David G0MRF via AMSAT-BB
> >> <amsat-bb@xxxxx.xxx> wrote:
> >>>
> >>>
> >>>
> >>> Interesting.
> >>>
> >>> Only a few days ago there was a comment that a satellite launched 15
> years ago was transmitting on 144.390 which was being used for weak signal
> meteor scatter in Europe. That was unintentional and in any case only sent
> a couple of very short beacons per minute.
> >>>
> >>> Now we see another satellite 'licensed' very recently using exactly
> the same frequency and a lot of other satellites transmitting on
> frequencies allocated to repeaters and other services.
> >>>
> >>> I presume the IARU were 'informed' of these frequencies rather than
> coordinating them.
> >>>
> >>> I wonder if the head of licensing in Bejing is the same chap who
> thought the Anti satellite missile test, that produced thousands of pieces
> of space debris, was a good idea.
> >>>
> >>> (rant over)
> >>>
> >>> David
> >> _______________________________________________
> >> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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: Wed, 5 Aug 2015 21:48:48 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
To: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] CAMSAT Frequency chaos
Message-ID: <EACF3178C8AB44309C391739D11333F5@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=original
Dear Edson,
I agree with everything you say...it is obvious that we must work much
harder on these two issues in the future!
73
Graham
G3VZV
-----Original Message-----
From: Edson W. R. Pereira
Sent: Wednesday, August 05, 2015 9:21 PM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] CAMSAT Frequency chaos
Amateur satellites operating outside the allocated sub-bands is a very
unfortunate and bad precedent. Radio Amateurs from different countries and
different IARU regions spend years negotiating bandplans so that we can all
operate in harmony without causing interference to other amateurs.
The 2m band is indeed crowded, but we do have practically desert bands
above 70cm that so badly need activity. Not only the bands are available,
but we *need* to use them. Otherwise we will lose them.
73, Edson PY2SDR
---
- We humans have the capability to do amazing things if we work together.
- N?s seres humanos temos a capacidade de fazer coisas incr?veis se
trabalharmos juntos.
On Wed, Aug 5, 2015 at 2:32 PM, Paul Stoetzer <n8hm@xxxx.xxx> wrote:
> Hit send before I could attach the last link, for the CAS-3
> coordination request.
>
> http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=458
>
> 73,
>
> Paul, N8HM
>
>
> On Wed, Aug 5, 2015 at 1:32 PM, Paul Stoetzer <n8hm@xxxx.xxx> wrote:
> > The CAMSAT filing you referenced is for the CAS-2 series not yet
> > scheduled for a launch, not the CAS-3 series on this launch.
> >
> > LilacSat-2 has other frequencies coordinated:
> >
> > http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=395
> >
> > The CAS-3 series is pending coordination here:
> >
> >
> >
> >
> > On Wed, Aug 5, 2015 at 1:27 PM, Patrick STODDARD (WD9EWK/VA7EWK)
> > <amsat-bb@xxxxxx.xxx> wrote:
> >> David,
> >>
> >> I noticed the frequency selections for all of those satellites. It is
> nice
> >> that we may have 6 transponders that don't have overlapping
> >> frequencies,
> >> which could make for some interesting times ("Which of the 6 will you
> >> be
> >> on?" - for example). Seeing how some of those downlinks are at and
> >> below
> >> 145.800 MHz could cause many new issues with terrestrial and (for
> >> 145.800 MHz) other space operations. Also seeing APRS at 144.390 MHz
> >> (North American APRS frequency) and an FM uplink at 144.350 MHz on
> >> LilacSat-2 (CAS-3H) won't make some any happier.
> >>
> >> CAMSAT filed for IARU frequency coordination in 2012:
> >>
> >> http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=264
> >>
> >> but it doesn't appear to have gone anywhere past the filing step. I did
> not
> >> see frequencies listed on that web page, nor did I see the CAMSAT
> satellites
> >> anywhere else on that site. I can only guess the Chinese licensing
> >> authorities are making full use of the 144-146 MHz range that is
> permitted
> >> under the international (ITU) radio regulations for amateur satellite
> >> operation, regardless of the voluntary bandplans observed around the
> >> world.
> >>
> >> 73!
> >>
> >>
> >>
> >>
> >> Patrick WD9EWK/VA7EWK
> >> http://www.wd9ewk.net/
> >> Twitter: @xxxxxx
> >>
> >>
> >>
> >> On Wed, Aug 5, 2015 at 10:00 AM, David G0MRF via AMSAT-BB
> >> <amsat-bb@xxxxx.xxx> wrote:
> >>>
> >>>
> >>>
> >>> Interesting.
> >>>
> >>> Only a few days ago there was a comment that a satellite launched 15
> years ago was transmitting on 144.390 which was being used for weak signal
> meteor scatter in Europe. That was unintentional and in any case only sent
> a couple of very short beacons per minute.
> >>>
> >>> Now we see another satellite 'licensed' very recently using exactly
> the same frequency and a lot of other satellites transmitting on
> frequencies allocated to repeaters and other services.
> >>>
> >>> I presume the IARU were 'informed' of these frequencies rather than
> coordinating them.
> >>>
> >>> I wonder if the head of licensing in Bejing is the same chap who
> thought the Anti satellite missile test, that produced thousands of pieces
> of space debris, was a good idea.
> >>>
> >>> (rant over)
> >>>
> >>> David
> >> _______________________________________________
> >> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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@xxxxx.xxx. 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: Wed, 5 Aug 2015 14:50:55 -0700
From: "Ted" <k7trkradio@xxxxxxx.xxx>
To: "'David'" <dwarnberg@xxxxxxx.xxx>, "'Diane Bruce'" <db@xx.xxx>
Cc: amsat-bb@xxxxx.xxxx "'Don Hoover \(WS4E\)'" <ws4e@xxxx.xxx>
Subject: Re: [amsat-bb] Screw threads on Arrow?
Message-ID: <001501d0cfc8$ce9207f0$6bb617d0$@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
That is the LENGTH
The thread of the piece is either 6-32 or 8-32. If you can't find the same
pieces you can buy the parts at Home Depot and cut off the head
73, K7TRK
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David
Sent: Wednesday, August 05, 2015 9:39 AM
To: 'David'; 'Diane Bruce'
Cc: amsat-bb@xxxxx.xxxx 'Don Hoover (WS4E)'
Subject: Re: [amsat-bb] Screw threads on Arrow?
Actually I found it online.. here is the link...
http://www.arrowantennas.com/parts/p146437-10.html
David, KK4QOE
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David
Sent: Wednesday, August 05, 2015 12:33 PM
To: 'Diane Bruce'
Cc: amsat-bb@xxxxx.xxxx 'Don Hoover (WS4E)'
Subject: Re: [amsat-bb] Screw threads on Arrow?
Ahh yes, my mistake... Anyway there is a spare parts list that came with the
antenna (I have it) but it does not list size, it says 2 - 1/4 stud.. but
that does not answer your question..
If you need this list or would like it I can scan it and post it or send it
to you..
Sorry for the confusion
David, KK4QOE
-----Original Message-----
From: Diane Bruce [mailto:db@xx.xxxx
Sent: Wednesday, August 05, 2015 11:58 AM
To: David
Cc: 'David Haworth'; 'Don Hoover (WS4E)'; amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Screw threads on Arrow?
On Wed, Aug 05, 2015 at 11:29:08AM -0400, David wrote:
> If I recall correctly they are the same size as a camera tripod.. so
> they would be a 1/4-20
I was going to answer this then realised he is really talking about the
elements themselves? I've not looked yet.
>
> David, KK4QOE
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David
> Haworth
> Sent: Wednesday, August 05, 2015 11:03 AM
> To: Don Hoover (WS4E)
> Cc: amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] Screw threads on Arrow?
>
> They look like 8-32
>
>
> > On Aug 5, 2015, at 6:29 AM, Don Hoover (WS4E) <ws4e@xxxx.xxx> wrote:
> >
> > Does anyone know the screw size/threads used for the elements on the
> > dual band Arrow Antenna?
> >
> > I have some that are a little bent and want to start looking for
> > replacements and maybe buy some spares as well.
> >
> > Thanks.
> > Don
> > WS4E
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. 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
>
> 73,
> Clear and dark skies without RFI,
> David Haworth, WA9ONY
> http://www.stargazing.net/david <http://www.stargazing.net/david>
> davidahaworth@xxxxxx.xxx
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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
>
--
- db@xxxxxxx.xxx db@xx.xxx http://www.db.net/~db
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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: Wed, 05 Aug 2015 16:32:38 -0700
From: KO6TZ Bob <my.callsign@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Screw threads on Arrow?
Message-ID: <55C29D16.6040807@xxxxxxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII; format=flowed
Beware the Pox,
the Plague,
the Ides,
and man who can measure,
screw pitch and size...
My arrow antenna has SAE 8-32 screw studs to attach the elements.
KO6TZ Bob
------------------------------
Message: 6
Date: Wed, 5 Aug 2015 23:47:13 +0000 (UTC)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SPROUT Deployable Membrane ? Request for Telemetry
Message-ID:
<1865884328.730671.1438818433908.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Students at Nihon University in Japan are requesting the assistance of radio
amateurs in collecting telemetry from the satellite which has deployed an
inflatable membrane structure. Further information at
http://amsat-uk.org/2015/08/05/sprout-telemetry-request/
73 Trevor M5AKA
----
AMSAT-UK?http://amsat-uk.org/
Twitter?https://twitter.com/AmsatUK
Facebook?https://facebook.com/AmsatUK
YouTube?https://youtube.com/AmsatUK
----
------------------------------
Message: 7
Date: Wed, 5 Aug 2015 16:58:36 -0700
From: "Ted" <k7trkradio@xxxxxxx.xxx>
To: "'M5AKA'" <m5aka@xxxxx.xx.xx>, "'AMSAT BB'" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SPROUT Deployable Membrane ? Request for
Telemetry
Message-ID: <002a01d0cfda$a4f3ddd0$eedb9970$@xxxxxxx.xxx>
Content-Type: text/plain; charset="utf-8"
Hi Trevor,
In HRD (using only nasabare.txt) , I'm showing this as object 39770? Is
that accurate
Tnx, 73, Ted, K7TRK
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of M5AKA
Sent: Wednesday, August 05, 2015 4:47 PM
To: AMSAT BB
Subject: [amsat-bb] SPROUT Deployable Membrane ? Request for Telemetry
Students at Nihon University in Japan are requesting the assistance of radio
amateurs in collecting telemetry from the satellite which has deployed an
inflatable membrane structure. Further information at
http://amsat-uk.org/2015/08/05/sprout-telemetry-request/
73 Trevor M5AKA
----
AMSAT-UK http://amsat-uk.org/
Twitter https://twitter.com/AmsatUK
Facebook https://facebook.com/AmsatUK
YouTube https://youtube.com/AmsatUK
----
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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: Wed, 05 Aug 2015 17:46:40 -0700
From: Greg Dolkas <ko6th.greg@xxxxx.xxx>
To: David <dwarnberg@xxxxxxx.xxx>,'Zach Leffke' <zleffke@xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] new sats and 23cm
Message-ID: <f07b8c7d-a5fb-43f3-bc7f-6e6c5f383171@xxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I also have 10w on 23cm from my Yaesu FT-736R, and a reasonable beam on the
rotor. At least, it worked quite well through the recent LEOs.
How much EIRP are we expected to need for tthis one?
Greg KO6TH
On August 5, 2015 5:52:06 AM PDT, David <dwarnberg@xxxxxxx.xxx> wrote:
>Zach, all... thanks very much for all the replies, it does give me some
>things to ponder... I do realize the add on 23cm module for the
>IC-9100 has only 10 watts output.. so it seems to limit my options or
>add more cost to the final setup...
>
>Again thanks everyone for the replies, as par for the course you guys
>are very helpful
>
>Thanks All
>
>David, KK4QOE
>
>-----Original Message-----
>From: Zach Leffke [mailto:zleffke@xx.xxxx
>Sent: Wednesday, August 05, 2015 1:20 AM
>To: David
>Cc: amsat-bb@xxxxx.xxx
>Subject: Re: [amsat-bb] new sats and 23cm
>
>Sorry, typo... G/T doesn't make sense since uplink only band....please
>substitute 'affect G/T' with 'affect overall link budgets' in my
>previous email.
>
>Apologies, its late and I need sleep.
>
>-Zach, KJ4QLP
>
>On Aug 5, 2015 1:12 AM, Zach Leffke <zleffke@xx.xxx> wrote:
>>
>> Directive Systems and engineering has loop yagis specifically for the
>amateur satellite service in this band. It is what we will be using in
>the Virginia Tech ground station. No feedback yet on performance
>(we're not up yet) but they look very well made and the folks at the
>company are fantastic and they have a great reputation with their
>antennas at microwave and up. They are fairly compact and lightweight
>as well and could likely be added to a G5500 style setup with ease and
>minimal additional strain on the motors.
>>
>> I'm not aware of any omnis for this band off the top of my head, but
>being that it is an uplink only allocation, lack of gain and increased
>path loss could be made up for with power (bearing in mind the recent
>threads on proper uplink power levels). Consider though that there is
>about 18.8dB and 9.7dB of additional path loss over VHF and UHF
>respectively. Assuming similar rx gains and noise performance on the
>bird at 23cm, as well as atmo/iono losses, that additional loss will
>have to be overcome on the ground, either with increased antenna gains,
>or with increased power. Given that the 9100 makes about 10W on 23cm,
>it may be time for a decision. a) 23cm module plus fairly beefy amp
>plus homebrew omni, or b) 23cm module plus rotator system plus well
>built (and factory tuned) yagi.
>>
>> Personally, I'd recommend option b with rotator plus beam plus lower
>power, mainly because antenna gain is easy/cheap at 23cm and PAs can be
>expensive/tricky at 23cm, but I have access to existing rotator
>systems which bias my opinions.
>>
>> My two cents....
>>
>> Also it might be interesting to see some more rigorous analysis and
>antenna designs for 23cm (omnis and beams). Maybe comparisons of
>various omnis and various beams and how they affect G/T (imagine a cute
>little lindenblad or turnstyle or eggbeater for 23cm and how physically
>small it would be compared to what we are used to at VHF/UHF, it would
>be roughly a third of the size of its UHF equivalent!). Once we can get
>some details from the Fox engineering crew or Ops crew on the expected
>performance of the uplink receiver on 23cm, could make for a good
>article or two for the Journal (especially the bit on 'microwave omnis'
>and their feasibility, I'm sure the eng/ops crew has or will have a
>solid handle on the overall receiver performance and link budgets).
>>
>> -Zach, KJ4QLP
>>
>> On Aug 4, 2015 11:32 AM, David <dwarnberg@xxxxxxx.xxx> wrote:
>> >
>> > I see lots of talk about some new sats going up that will be
>utilizing 23cm.
>> > so I have some questions.. first let me explain what I have setup
>> > currently.
>> >
>> > 1) Icom IC-9100 (23cm module not added yet)
>> >
>> > 2) M2 eggbeaters (70cm and 2m) with preamps
>> >
>> >
>> >
>> > So I am contemplating adding the 23cm add on for the 9100 but
>> > perplexed about an antenna. suggestions?
>> >
>> >
>> >
>> > Thanks
>> >
>> >
>> >
>> > David, KK4QOE
>> >
>> > _______________________________________________
>> > Sent via AMSAT-BB@xxxxx.xxx. 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:
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>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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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--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
------------------------------
Message: 9
Date: Wed, 5 Aug 2015 20:54:33 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Greg Dolkas <ko6th.greg@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, Zach Leffke
<zleffke@xx.xxx>
Subject: Re: [amsat-bb] new sats and 23cm
Message-ID:
<CABzOSOqyPGY6Fodh3rFZRTsDzUtKn2QR5o2LFAMhbF+FELsgeQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
FUNcube on ESEO says 100w EIRP for their L/V FM transponder. I don't
recall seeing any estimates for Fox-1C or Fox-1D.
http://amsat-uk.org/2013/02/02/amsat-uk-to-provide-amateur-radio-payload-for-e
seo-satellite/
I did link budget calculations a while ago (can't find them though...)
and came to the same conclusion, assuming the sensitivity of the L
band downconverter on Fox-1C and 1D is similar to the specification
for the 435 MHz receiver (-120 dBm for a 12 dB SINAD), about 100w EIRP
will be needed at maximum range given the high path losses on 23cm.
73,
Paul, N8HM
On Wed, Aug 5, 2015 at 8:46 PM, Greg Dolkas <ko6th.greg@xxxxx.xxx> wrote:
> I also have 10w on 23cm from my Yaesu FT-736R, and a reasonable beam on
the rotor. At least, it worked quite well through the recent LEOs.
>
> How much EIRP are we expected to need for tthis one?
>
> Greg KO6TH
>
>
> On August 5, 2015 5:52:06 AM PDT, David <dwarnberg@xxxxxxx.xxx> wrote:
>>Zach, all... thanks very much for all the replies, it does give me some
>>things to ponder... I do realize the add on 23cm module for the
>>IC-9100 has only 10 watts output.. so it seems to limit my options or
>>add more cost to the final setup...
>>
>>Again thanks everyone for the replies, as par for the course you guys
>>are very helpful
>>
>>Thanks All
>>
>>David, KK4QOE
>>
>>-----Original Message-----
>>From: Zach Leffke [mailto:zleffke@xx.xxxx
>>Sent: Wednesday, August 05, 2015 1:20 AM
>>To: David
>>Cc: amsat-bb@xxxxx.xxx
>>Subject: Re: [amsat-bb] new sats and 23cm
>>
>>Sorry, typo... G/T doesn't make sense since uplink only band....please
>>substitute 'affect G/T' with 'affect overall link budgets' in my
>>previous email.
>>
>>Apologies, its late and I need sleep.
>>
>>-Zach, KJ4QLP
>>
>>On Aug 5, 2015 1:12 AM, Zach Leffke <zleffke@xx.xxx> wrote:
>>>
>>> Directive Systems and engineering has loop yagis specifically for the
>>amateur satellite service in this band. It is what we will be using in
>>the Virginia Tech ground station. No feedback yet on performance
>>(we're not up yet) but they look very well made and the folks at the
>>company are fantastic and they have a great reputation with their
>>antennas at microwave and up. They are fairly compact and lightweight
>>as well and could likely be added to a G5500 style setup with ease and
>>minimal additional strain on the motors.
>>>
>>> I'm not aware of any omnis for this band off the top of my head, but
>>being that it is an uplink only allocation, lack of gain and increased
>>path loss could be made up for with power (bearing in mind the recent
>>threads on proper uplink power levels). Consider though that there is
>>about 18.8dB and 9.7dB of additional path loss over VHF and UHF
>>respectively. Assuming similar rx gains and noise performance on the
>>bird at 23cm, as well as atmo/iono losses, that additional loss will
>>have to be overcome on the ground, either with increased antenna gains,
>>or with increased power. Given that the 9100 makes about 10W on 23cm,
>>it may be time for a decision. a) 23cm module plus fairly beefy amp
>>plus homebrew omni, or b) 23cm module plus rotator system plus well
>>built (and factory tuned) yagi.
>>>
>>> Personally, I'd recommend option b with rotator plus beam plus lower
>>power, mainly because antenna gain is easy/cheap at 23cm and PAs can be
>>expensive/tricky at 23cm, but I have access to existing rotator
>>systems which bias my opinions.
>>>
>>> My two cents....
>>>
>>> Also it might be interesting to see some more rigorous analysis and
>>antenna designs for 23cm (omnis and beams). Maybe comparisons of
>>various omnis and various beams and how they affect G/T (imagine a cute
>>little lindenblad or turnstyle or eggbeater for 23cm and how physically
>>small it would be compared to what we are used to at VHF/UHF, it would
>>be roughly a third of the size of its UHF equivalent!). Once we can get
>>some details from the Fox engineering crew or Ops crew on the expected
>>performance of the uplink receiver on 23cm, could make for a good
>>article or two for the Journal (especially the bit on 'microwave omnis'
>>and their feasibility, I'm sure the eng/ops crew has or will have a
>>solid handle on the overall receiver performance and link budgets).
>>>
>>> -Zach, KJ4QLP
>>>
>>> On Aug 4, 2015 11:32 AM, David <dwarnberg@xxxxxxx.xxx> wrote:
>>> >
>>> > I see lots of talk about some new sats going up that will be
>>utilizing 23cm.
>>> > so I have some questions.. first let me explain what I have setup
>>> > currently.
>>> >
>>> > 1) Icom IC-9100 (23cm module not added yet)
>>> >
>>> > 2) M2 eggbeaters (70cm and 2m) with preamps
>>> >
>>> >
>>> >
>>> > So I am contemplating adding the 23cm add on for the 9100 but
>>> > perplexed about an antenna. suggestions?
>>> >
>>> >
>>> >
>>> > Thanks
>>> >
>>> >
>>> >
>>> > David, KK4QOE
>>> >
>>> > _______________________________________________
>>> > Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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@xxxxx.xxx. 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 from my Android device with K-9 Mail. Please excuse my brevity.
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: 10
Date: Thu, 6 Aug 2015 06:28:24 -0400
From: Bob KD7YZ <kd7yz@xxxxxxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] SPROUT Deployable Membrane ? Request for
Telemetry
Message-ID: <55C336C8.7080305@xxxxxxxxxxx.xx>
Content-Type: text/plain; charset=utf-8
On 05-Aug-15 1958, Ted wrote:
> ... I'm showing this as object 39770? Is that accurate
that is what I have using SatPC32.
fwiw though, I have not found it for many days.
I do not hear the CW on 437.525
I do not hear the telemetry on 437.600
maybe my Keplarian's are wrong, but they are updated daily.
I successfully decode many others every day.
according to their schedule page, SPROUT is operational on both frequencies.
http://sat.aero.cst.nihon-u.ac.jp/wordpress/?page_id=1212
73,
--
Bob KD7YZ
http://www.qrz.com/db/kd7yz
AMSAT LM#901
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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!
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------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 235
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