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CX2SA > SATDIG 14.05.20 14:40l 708 Lines 28613 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Uplink Doppler Changes For FM Satellites (Tim Crawford)
2. Re: RS-44 on LOTW? (Don KB2YSI)
3. Re: L band gear (Ed Krome)
4. Re: L band gear (Jerry Buxton)
5. Re: L band gear (Leffke, Zachary)
6. Huskysat in safe mode (Kevin)
7. Re: Huskysat in safe mode (Michael Walker)
8. Huskysat in safe mode (Roy Dean)
9. Re: L band gear (Ed Krome)
----------------------------------------------------------------------
Message: 1
Date: Wed, 13 May 2020 23:59:39 +0000 (UTC)
From: Tim Crawford <tcarchcape@?????.???>
To: peter@??????.???? "Peter Goodhall (2M0SQL)"
<peter@????????.??.??>, saguaroastro <saguaroastro@???.???>
Cc: Amsat <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Uplink Doppler Changes For FM Satellites
Message-ID: <1940939272.537763.1589414379055@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Rick,
Thank you for that.... appreciate it
tim
On Wednesday, May 13, 2020, 4:50:14 PM PDT, saguaroastro
<saguaroastro@???.???> wrote:
CAS 7A has (or will? have) an FM transponder in addition to the 3 linears (
15/10;15/70; 2/70)
Launch show 15 sep 2020. Not sure how they plan to schedule that, but it
sounds like it'll be a fun bird.
73Rick Tejera (K7TEJ)Saguaro Astronomy ClubWww.saguaroastro.orgThunderbird
Astronomy ClubWww.w7tbc.org
-------- Original message --------From: "Peter Goodhall (2M0SQL) via
AMSAT-BB" <amsat-bb@?????.???> Date: 5/13/20 12:11 (GMT-07:00) To: Tim
Crawford <tcarchcape@?????.???> Cc: Amsat <amsat-bb@?????.???> Subject: Re:
[amsat-bb] Uplink Doppler Changes For FM Satellites
Confused why you think Huskysat-1, DOSAAF-85 (RS-44), CAS-7A? are FM
sats they are all linear so please don't be putting any FM through
them.
Current FM fleet is AO-91, AO-92, SO-50, Lilacsat-2 and PO-101 nothing else.
You still need to put Doppler correction into the memories on AO-91
and AO-92 not sure why you wouldn't be there are so many charts
available just to transpose into the memory software.
Peter, 2M0SQL
On Wed, 13 May 2020 at 19:52, Tim Crawford via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> Uplink Doppler Changes For FM Satellites Question.? I am updating my HH
Freq currently.
>
> As I under stand it, the Fox Satellites (AO-91 & 92) receiver have AFC
(automatic Frequency Control) which means that no doppler change in the
transmit frequency is required nor should it be put into effect.
> My question is does anyone know whether or not any of the following FM
Satellites also have AFC for their receivers?
>
> PO-101 (Diwata)CAS-3H (LilacSat-2)Huskysat-1DOSAAF-85 (RS-44)CAS-7A (not
launched? yet)
> Thank you for your assistance.
> 73
> Tim CrawfordKE7TAC
> _______________________________________________
> 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, 13 May 2020 20:31:24 -0400
From: Don KB2YSI <kb2ysi@?????.???>
To: Bernie and Cheryl <hamdan@??.??????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] RS-44 on LOTW?
Message-ID:
<CAAJiE8N+PJL2fUR9s=c0ww-KOLKaR_wKAa4Z2b5v_hG5LJ3sCw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
The thought of the TQSL change is to prevent someone re-uploading their log
with an incorrect location and wiping out previously confirmed contacts.
As an example, if I work you and you confirm whatever
grid/state/dxcc/etc... and I do submit the QSO for an award it can still be
changed. So you move, update your location In HRD and TQSL and upload your
entire ADIF with the new location. Boom. All the QSO's are changed from
confirming your old location to confirming your new location.
Currently it will only do this check if the data is available, but that
could change into a required field at some point. If it did, I would hope
it would be smart enough to match my defined locations and use them for
each QSO as needed. It sure would be a great improvement for serial rovers!
On Wed, May 13, 2020, 19:30 Bernie and Cheryl via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Thanks to everyone who replied. And yes, Tucker, I am using HRD for my
> logging, and therein lay my problem.
>
> Here's what the problem was. I originally had a problem uploading RS-44
> QSO's to LOTW. Several here on the list replied to my original post and
> suggested that my version of TQSL might be outdated. So, I downloaded
> Version 2.5.3. This resulted in a situation where NO QSO's could be
> uploaded, including non-satellite contacts, such as HF contacts.
>
> Tucker's question about using HRD (aka, Ham Radio Deluxe, of which I am
> using the latest version, i.e, V6.7.0.277) and his link to the HRD blog
> sent me off in the right direction. It turned out that the "Station
> Location" data I had first input into HRD included the use of the word
> "Colorado" rather than the postal abbreviation of "CO". TQSL now
> interprets the use of the full spelling of a state, as opposed to its
> postal abbreviation as an "error", and won't allow the log entry to be
> uploaded. Once I changed the home state field in my HRD program, I went
> out and worked someone and was able to upload that new QSO to LOTW
> immediately.
>
> But, what about my old QSO's that I hadn't uploaded yet? It turns out
> that BOTH states need to use the postal abbreviation. In other words,
> not only does the entry for the state of my station need to use the
> postal abbreviation, but now the state of the station I am working needs
> to be changed to use the postal abbreviation. If this is not done both
> ways, the QSO can't be uploaded. So, I went back to my RS-44 QSO's, and
> had to change a few QSO's to the respective postal abbreviations (there
> were only about 3-4 our out of 19 QSO's like this, and yet none of them
> could be uploaded in the same attempt). After doing that, all of my
> RS-44 QSOs were uploaded to LOTW without a problem.
>
> I'm not sure that what the programmers for TQSL did was an improvement.
> But, I can testify to the fact that I learned a great lesson in
> patience, so maybe that was the whole point??? I hate software updates!
>
> Thanks to Tucker, KI7UNJ, and the rest of you for your helpful replies.
> See you on the birds!
>
> 73 de Bernie, KF0QS
>
> On 5/12/2020 7:29 AM, KI7UNJ Tucker wrote:
> > You using HRD by chance for your logging?
> >
> > Here is a post from my local club about HRD And the new version of TQSL
> >
> > **************
> > It turns out that you are right, the problem appears to be in the Log
> > file created by HAM Radio Deluxe. This article tells us how to fix it:
> >
>
https://www.hamradiodeluxe.com/blog/TQSL-v252-TipsnTricks-for-Correcting-Your-
Log-Data.html
> > <
>
https://www.hamradiodeluxe.com/blog/TQSL-v252-TipsnTricks-for-Correcting-Your-
Log-Data.html
> >
> >
> > Rick Murphy provided that pointer:
> > https://groups.arrl.org/g/ARRL-LoTW/message/32757?p=,,,20,0,0,0
> > *****************
> >
> > https://groups.arrl.org
> > <https://groups.arrl.org/g/ARRL-LoTW/message/32757?p=,,,20,0,0,0>On
> > Tue, May 12, 2020 at 06:22 KI7UNJ Tucker <ki7unj@?????.???
> > <mailto:ki7unj@?????.???>> wrote:
> >
> > Good morning
> >
> > For the BB when you want to respond do a ?reply all? that will
> > reply to both the person whom responded and back to the BB. now if
> > that person only did a reply to you and not to the BB you can add
> > the BB email on the to list with there name if you want the
> > response to go to the BB.
> >
> > As for TQSL... I assume your using a logging software and it?s
> > sending the data to TQSL? If so TQSL changed a bit in what it
> > expects in the log 2 versions ago and many logging apps need to be
> > updated. I?ll try and find the post about it and forward it to you.
> >
> >
> > On Mon, May 11, 2020 at 22:15 Bernie and Cheryl
> > <hamdan@??.??????.??? <mailto:hamdan@??.??????.???>> wrote:
> >
> > Hi Tucker:
> >
> > We've worked on the birds several times. Indeed, I believe
> > we've exchanged QSL's.
> >
> > I have a couple of questions if you don't mind. First, I
> > downloaded the newest version of TQSL. Now, it refuses to
> > upload /any /contacts. I get the following screen when I try
> > to upload: "Failed to sign the ADIF with TQSL, see logfile for
> > more info." Do you know what the problem is?
> >
> > Secondly, so that I don't have to pester you with every
> > question, how do I respond to a post on the AMSAT board so
> > that the whole board can read it? Obviously, I can respond to
> > individuals who replied to my original post using direct email
> > (at least I know how to do original posts), but I don't know
> > how to respond on the board itself.
> >
> > Thanks, and hope to see you on the birds soon.
> >
> > 73 de Bernie, KF0QS
> >
> > On 5/10/2020 1:44 PM, KI7UNJ Tucker wrote:
> >> RS-44 is in LOTW, I have multiple QSL in LTOW from it. You
> >> will need to update your TQSL (came out May 1st) with the
> >> latest config. and make sure you have sat = "RS-44"
> >>
> >>
> >>
> >>
> >> On Sun, May 10, 2020 at 11:53 AM Bernie and Cheryl via
> >> AMSAT-BB <amsat-bb@?????.??? <mailto:amsat-bb@?????.???>>
> wrote:
> >>
> >> Dear Folks:
> >>
> >> I have been uploading my QSO's to LOTW fairly quickly. I
> >> have noticed
> >> that none of my RS-44 QSOs show up. Is this happening
> >> for everyone? If
> >> not, what am I doing wrong?
> >>
> >> Thanks, in advance, for any help you can give me.
> >>
> >> 73 de Bernie, KF0QS
> >>
> >> _______________________________________________
> >> Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>.
> >> AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring
> >> membership. Opinions expressed
> >> are solely those of the author, and do not reflect the
> >> official views of AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur
> >> satellite program!
> >> Subscription settings:
> >> https://www.amsat.org/mailman/listinfo/amsat-bb
> >>
> >>
> >>
> >> --
> >> *Casey Tucker KI7UNJ*
> >> https://twitter.com/KI7UNJ
> >>
> > --
> > *Casey Tucker KI7UNJ*
> > https://twitter.com/KI7UNJ
> >
> > --
> > *Casey Tucker KI7UNJ*
> > https://twitter.com/KI7UNJ
> >
> _______________________________________________
> 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: 3
Date: Wed, 13 May 2020 22:21:56 -0400
From: Ed Krome <e.krome@???????.???>
To: 73 Bob W7LRD <w7lrd@???????.???>
Cc: amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] L band gear
Message-ID: <25703267-0CB0-4A92-80E5-14AC4369ACE3@???????.???>
Content-Type: text/plain; charset=utf-8
I?m a bit surprised that so few are using portable (and no homebrew) 1267.
Here?s an alternative, homebrew style. Something old and something new.
Antenna: 12el hb yagi with folded dipole DE, mounted on top of Arrow with 8?
fiberglass rod spacers
Amplifier: hb brick amp with RA18H1213G. See AMSAT Journal Jan-Feb 2019 for
construction details. Can do 30W, but never use that much.
Transmit-converter: ancient hb, dbm + discreet transistor amps. Would be so
much easier today with MMIC?s. ~1/2W out. Originally built for AO-10 and
used a lot on -10 & -13
RF (2M) source: Baofeng UV5R+ ht. Why? Because that thing has no problem
transmitting slightly below the 2M band edge. The trans-converter was
crystaled so 145 in = 1269 out. AO92 is 1267.x, so the trans-conv requires
143.x input. In the AO10&13 days, the driver was a Drake T4X driving an hb
2M transverter. Complicated, but as a fixed station (100+W out from 2x7289)
it worked well.
The whole portable rig runs on a single drone battery.
Now if I could just get around to operating once in a while.
Ed K9EK
Sent from my iPhone
> On May 13, 2020, at 12:53 PM, 73 Bob W7LRD via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?Hi all- I would be curious to know what "everyone" is using for L band
gear. Perhaps others would like to know. example I run
> IC-910- at 10W
> 70 feet of LMR600
> 24 element looper yagi horizontal polarized
> _______________________________________________
> 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, 13 May 2020 21:39:29 -0500
From: Jerry Buxton <n0jy@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] L band gear
Message-ID: <49e924c4-2b3b-4f11-74d3-38d2f4bbb2d2@?????.???>
Content-Type: text/plain; charset=utf-8
Amazing performance by AO-92s "Downshifter" experiment, IMO.? We did not
expect that degree of sensitivity through the UHF RX antenna, hence the
relatively hefty power (PEP) recommendation prior to launch which was
quickly dialed back when we tested during commissioning, and
corroborated by several reports of user QSOs with an HT.? Another great
design contribution by Engineering volunteer John Klingelhoeffer, WB4LNM.
Jerry Buxton, N?JY
On 5/13/2020 12:23, Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB wrote:
> I could work
> AO-92 at either 1W or (sometimes) 300mW.
------------------------------
Message: 5
Date: Thu, 14 May 2020 03:59:50 +0000
From: "Leffke, Zachary" <zleffke@??.???>
To: "AMSAT-BB@?????.???? <AMSAT-BB@?????.???>
Subject: Re: [amsat-bb] L band gear
Message-ID:
<MN2PR05MB70372A52746B446C9C35F203DFBC0@?????????????.????????.????.???????.??
?>
Content-Type: text/plain; charset="utf-8"
In line with Ed's thoughts on homebrew....
somewhere on my todo list is to take a look at the W1GHZ 1296 transverter
kit (SUPER cheap to get on the air, great documentation) with an eye towards
'tweaks' for 1267(ish). Very high(hi) level ideas include different LO (I
think, but haven't confirmed, the digiLO may have an output suitable for
this) to produce a useable IF. I also just discovered the Si5351 arduino
controllable synthesizer (~$10 for a breakout board), which with a few
multiplication stages and some filtering, might make for a suitable base
chip for a configurable custom LO design on the cheap (there's probably
already a QEX article somewhere for this). The builtin PCB hairpin filters
on the 1296 transverter might be an issue....but also might not be an issue,
and maybe also 'tweakable' (razorblade style....or maybe with a little
copper foil tape).
W6PQL has some good reference designs as well for the RA18H1213G Ed
mentioned (he might also be the author of the referenced articles, not sure
haven't checked).
Wanted to get the basic idea out there in support of the homebrew concept:
W1GHZ transverters for satellite bands.....the idea might be extendable to
higher bands as well for future birds (i.e. GOLF) for cheap access to
microwave for satellite....the pipecap filters used on higher frequencies
are probably more easily tuneable than the PCB filters on the lower
bands...so in a way, the higher bands might be easier to tweak for the
satellite sub bands.
As is probably obvious, not fully thought through idea, so not sure of the
feasibility, and currently pretty far down on the todo list.....but I'd be
happy for someone to beat me to the punch! Adventures in this area would
make for some great articles for the Journal and help spread the word and
stimulate some microwave activity.
-Zach, KJ4QLP
--
Research Associate
Aerospace & Ocean Systems Lab
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Ed Krome via AMSAT-BB
Sent: Wednesday, May 13, 2020 10:22 PM
To: 73 Bob W7LRD <w7lrd@???????.???>
Cc: amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] L band gear
I?m a bit surprised that so few are using portable (and no homebrew) 1267.
Here?s an alternative, homebrew style. Something old and something new.
Antenna: 12el hb yagi with folded dipole DE, mounted on top of Arrow with 8?
fiberglass rod spacers
Amplifier: hb brick amp with RA18H1213G. See AMSAT Journal Jan-Feb 2019 for
construction details. Can do 30W, but never use that much.
Transmit-converter: ancient hb, dbm + discreet transistor amps. Would be so
much easier today with MMIC?s. ~1/2W out. Originally built for AO-10 and
used a lot on -10 & -13
RF (2M) source: Baofeng UV5R+ ht. Why? Because that thing has no problem
transmitting slightly below the 2M band edge. The trans-converter was
crystaled so 145 in = 1269 out. AO92 is 1267.x, so the trans-conv requires
143.x input. In the AO10&13 days, the driver was a Drake T4X driving an hb
2M transverter. Complicated, but as a fixed station (100+W out from 2x7289)
it worked well.
The whole portable rig runs on a single drone battery.
Now if I could just get around to operating once in a while.
Ed K9EK
Sent from my iPhone
> On May 13, 2020, at 12:53 PM, 73 Bob W7LRD via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?Hi all- I would be curious to know what "everyone" is using for L band
gear. Perhaps others would like to know. example I run
> IC-910- at 10W
> 70 feet of LMR600
> 24 element looper yagi horizontal polarized
> _______________________________________________
> 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: 6
Date: Wed, 13 May 2020 23:14:58 -0700
From: Kevin <wa7fwf@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: [amsat-bb] Huskysat in safe mode
Message-ID: <6053feea-e7d7-7a35-3f24-9615741cfbbd@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Huskysat appears to be in safe mode.
Kevin WA7FWF
------------------------------
Message: 7
Date: Thu, 14 May 2020 07:43:25 -0400
From: Michael Walker <va3mw@??????????.???>
To: Kevin <wa7fwf@?????.???>
Cc: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Huskysat in safe mode
Message-ID:
<CA+33ts5B7hwssgRfqL_dDL8VqERXjb-eUfq0R2yrQ2Rs2RjhCg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
What is Safe Mode?
Mike va3mw
On Thu, May 14, 2020 at 2:15 AM Kevin via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Huskysat appears to be in safe mode.
>
> Kevin WA7FWF
> _______________________________________________
> 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: 8
Date: Thu, 14 May 2020 08:10:53 -0400
From: Roy Dean <royldean@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Huskysat in safe mode
Message-ID:
<CADGPg2vgTa2TopszFhp9T2wYVmCvWPDhdpPPD7N5fu9JPDM+Qw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
>
> Huskysat appears to be in safe mode. Kevin WA7FWF
Interesting that the status block shows "Safe Mode: False"
--Roy
K3RLD
------------------------------
Message: 9
Date: Thu, 14 May 2020 08:23:42 -0400
From: Ed Krome <e.krome@???????.???>
To: "Leffke, Zachary" <zleffke@??.???>
Cc: "AMSAT-BB@?????.???? <AMSAT-BB@?????.???>
Subject: Re: [amsat-bb] L band gear
Message-ID: <83F9D6BB-51EA-44E3-9331-DCAAFD2DE0D3@???????.???>
Content-Type: text/plain; charset=utf-8
Hi Zack
My comment about how much easier it is to get to 23cm today was based on
W1GHZ?s transverter. Great little device. I have been meaning to try mine on
1267. Also have thought about using my DigiLO as the LO, since it goes to
6ghz. It was slated for a 10ghz transverter but I don?t think it cares. You
and I should compare notes more often! W1GHZ also has some multiplier boards
that would simplify use of a lower freq as a base. Not (yet) familiar with
the Arduino based Si synthesizer. Need to look for that thing. Do you have a
link? Oh great, a new project to grab my interest and devour limited (time)
resources. ?
The amplifier I referenced was my article. Easy to build, works great and 30
watts.
OK, so I?ll dig out and sweep/tweak the W1GHZ transverter and see what
happens. Stay tuned.
Ed Krome K9EK
Sent from my iPhone
> On May 14, 2020, at 12:00 AM, Leffke, Zachary via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> ?In line with Ed's thoughts on homebrew....
>
> somewhere on my todo list is to take a look at the W1GHZ 1296 transverter
kit (SUPER cheap to get on the air, great documentation) with an eye towards
'tweaks' for 1267(ish). Very high(hi) level ideas include different LO (I
think, but haven't confirmed, the digiLO may have an output suitable for
this) to produce a useable IF. I also just discovered the Si5351 arduino
controllable synthesizer (~$10 for a breakout board), which with a few
multiplication stages and some filtering, might make for a suitable base
chip for a configurable custom LO design on the cheap (there's probably
already a QEX article somewhere for this). The builtin PCB hairpin filters
on the 1296 transverter might be an issue....but also might not be an issue,
and maybe also 'tweakable' (razorblade style....or maybe with a little
copper foil tape).
>
> W6PQL has some good reference designs as well for the RA18H1213G Ed
mentioned (he might also be the author of the referenced articles, not sure
haven't checked).
>
> Wanted to get the basic idea out there in support of the homebrew concept:
W1GHZ transverters for satellite bands.....the idea might be extendable to
higher bands as well for future birds (i.e. GOLF) for cheap access to
microwave for satellite....the pipecap filters used on higher frequencies
are probably more easily tuneable than the PCB filters on the lower
bands...so in a way, the higher bands might be easier to tweak for the
satellite sub bands.
>
> As is probably obvious, not fully thought through idea, so not sure of the
feasibility, and currently pretty far down on the todo list.....but I'd be
happy for someone to beat me to the punch! Adventures in this area would
make for some great articles for the Journal and help spread the word and
stimulate some microwave activity.
>
> -Zach, KJ4QLP
> --
> Research Associate
> Aerospace & Ocean Systems Lab
> Ted & Karyn Hume Center for National Security & Technology
> Virginia Polytechnic Institute & State University
> Work Phone: 540-231-4174
> Cell Phone: 540-808-6305
>
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Ed Krome via
AMSAT-BB
> Sent: Wednesday, May 13, 2020 10:22 PM
> To: 73 Bob W7LRD <w7lrd@???????.???>
> Cc: amsat-bb <amsat-bb@?????.???>
> Subject: Re: [amsat-bb] L band gear
>
> I?m a bit surprised that so few are using portable (and no homebrew) 1267.
Here?s an alternative, homebrew style. Something old and something new.
> Antenna: 12el hb yagi with folded dipole DE, mounted on top of Arrow with
8? fiberglass rod spacers
> Amplifier: hb brick amp with RA18H1213G. See AMSAT Journal Jan-Feb 2019
for construction details. Can do 30W, but never use that much.
> Transmit-converter: ancient hb, dbm + discreet transistor amps. Would be
so much easier today with MMIC?s. ~1/2W out. Originally built for AO-10 and
used a lot on -10 & -13
> RF (2M) source: Baofeng UV5R+ ht. Why? Because that thing has no problem
transmitting slightly below the 2M band edge. The trans-converter was
crystaled so 145 in = 1269 out. AO92 is 1267.x, so the trans-conv requires
143.x input. In the AO10&13 days, the driver was a Drake T4X driving an hb
2M transverter. Complicated, but as a fixed station (100+W out from 2x7289)
it worked well.
> The whole portable rig runs on a single drone battery.
> Now if I could just get around to operating once in a while.
>
> Ed K9EK
>
> Sent from my iPhone
>
>> On May 13, 2020, at 12:53 PM, 73 Bob W7LRD via AMSAT-BB
<amsat-bb@?????.???> wrote:
>>
>> ?Hi all- I would be curious to know what "everyone" is using for L band
gear. Perhaps others would like to know. example I run
>> IC-910- at 10W
>> 70 feet of LMR600
>> 24 element looper yagi horizontal polarized
>> _______________________________________________
>> 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
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 159
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