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CX2SA > SATDIG 15.04.18 00:40l 844 Lines 30938 Bytes #999 (0) @ WW
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Sent: 180414/2235Z @:CX2SA.SAL.URY.SOAM #:40189 [Salto] FBB7.00e $:AMSATBB13135
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Making the transponder sats as easy as the fm birds (Greg D)
2. Re: Making the transponder sats as easy as the fm birds
(Gabriel Zeifman)
3. Re: Making the transponder sats as easy as the fm birds
(Bill Booth)
4. Re: Making the transponder sats as easy as the fm birds
(Paul Stoetzer)
5. Re: Making the transponder sats as easy as the fm birds
(Vince Fiscus, KB7ADL)
6. Re: Making the transponder sats as easy as the fm birds
(Pedro Converso)
7. Re: Making the transponder sats as easy as the fm birds
(Joe Werth)
8. Subject: Making the transponder sats as easy as the fm birds
(Mike Meadows)
9. Field portable multi-mode duplex options? (Ron VE8RT)
10. Antenna switching (Rolf Krogstad)
11. Re: Antenna switching (Mike Diehl)
12. Re: Antenna switching (jim@?????.????
----------------------------------------------------------------------
Message: 1
Date: Fri, 13 Apr 2018 22:23:40 -0700
From: Greg D <ko6th.greg@?????.???>
To: Eric Fort <eric.fort.listmail@??????????????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID: <4ee35842-b988-02a5-d367-f8f44ead9370@?????.???>
Content-Type: text/plain; charset=utf-8
"subaudible" is only sub audible when you're dead on frequency if you're
using SSB. For FM, where we are familiar with the technique, that's
fine. But instead of a tone, you'd perhaps be better off running Single
Sideband AM (i.e. a sub audible tone of zero hertz); there was a
satellite recently that was in that sort of mode (I forget which bird),
and it was really interesting to work.
BUT, one huge problem with sending up a "beacon tone" for aligning
stations to, is that you're sending a 100% duty cycle carrier (though
perhaps reduced power) to a transponder that really hates having 100%
carriers run through it. That's one of the big reasons why they don't
allow FM on the SSB / CW birds (the other being the extra bandwidth that
it takes).
Bottom line is that, yes, one can construct methods to aid in frequency
tracking. But One True Rule software-assisted operation works really
well already, for those who can use it, and can be backed all the way
down to manual for those who can't. And, manual operation of an SSB
station through a satellite is quite an interesting exercise. I often
find it more satisfying than having to deal with starting up and fussing
with all the computer automation "help". Just takes a bit of practice.
Greg KO6TH
Eric Fort wrote:
> Computer control or actually a variation of such *IS* what I?m considering
and proposing. Yes I have read ?the one true way?. I understand this manual
tweaking is how it?s currently done. Why however are we adjusting only one
frequency? It seems that we can adjust the transmit frequency so that it is
always the same distance from the beacon as seen by the satellite and the
receiver can automatically track the subduable tone transmitted. This means
that you need not drift across the transponder and the rx station
automatically tracks. What am I missing in this being hands off and always
on frequency?
>
> AF6EP
>
> Sent using SMTP.
>
>> On Apr 13, 2018, at 7:49 PM, Andy <w5acm@??????.???> wrote:
>>
>> So VERY true!
>> Thanks Bruce,
>> ANDY w5acm
>>
>>
>> -----Original Message-----
>> From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Bruce
>> Sent: Friday, April 13, 2018 9:40 PM
>> To: amsat-bb@?????.???
>> Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm birds
>>
>> Sorry, this theory of thought is incorrect. You must adjust the higher of
the two frequencies as it is most affected by Doppler. The true way to
adjust is really to adjust both frequencies, however in the absence of
computer control of both frequencies, you adjust the higher. Thus, if it is
the receive frequency, then you adjust the receive, if it is the transmit,
then you adjust the transmit. Holding the transmit frequency on the wrong
band will cause you to walk across all the other QSO's taking place which is
not a good practice.
>>
>> 73...bruce
>>
>>> On 4/13/2018 8:41 PM, Eric Fort wrote:
>>> I?ve had an idea for a long time as to making the satellites with linear
transponders as easy to use as the FM ?easy sats ?. Consider the following:
>>>
>>> As I understand it, the goal is to adjust your transmitter such that
your frequency at the satellite is constant.
>>>
>>> Our tracking program gives us range to the satellite and its velocity
relative to us given our location and the orbital parameters. From this we
should have computed Doppler for both transmit and receive.
>>>
>>> We also know the frequency at the satellite of the various beacons
>>> onboard. From this we can measure the doppler and work the other
>>> direction
>>>
>>> If we transmit a subaudable tone of known frequency we should be able
>>> to adjust the rx automatically by tracking the tone. (Acssb)
>>>
>>> Given these multiple ways of setting our tx/rx frequencies for our
location can this not simply be automated to such a degree as to simply
specify an offset from the beacon and operate as if it were a regular
predictable opening on hf?
>>>
>>> Af6ep
>>>
>>> Sent using SMTP.
>>> _______________________________________________
>>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed are solely those of the author, and do not reflect
the official views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>> --
>>
>> Bruce Paige, KK5DO
>>
>> AMSAT Director Contests and Awards
>> AMSAT Board Member 2016-2018
>>
>> ARRL Awards Field Checker (WAS, 5BWAS, VUCC), VE
>>
>> Houston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT* Also live
streaming MP3 at http://www.amsatnet.com Podcast at
http://www.amsatnet.com/podcast.xml or iTunes
>>
>> Latest satellite news on the ARRL Audio News http://www.arrl.org
>>
>> AMSAT on Twitter http://www.twitter.com/amsat
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available to
all interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
Opinions expressed
>> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Fri, 13 Apr 2018 21:15:16 -0800
From: Gabriel Zeifman <gabrielzeifman@?????.???>
To: Eric Fort <eric.fort.listmail@??????????????.???>
Cc: Andy <w5acm@??????.???>, AMSAT Mailing List <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID:
<CAEGYLCv1yoNELpNwHMpChAcyLgrsnLa8VHau=p-mvHqRdhStDw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Okay, first off, SatPC32 and other computer control software has done this
exact thing for years. And it has effectively done it without sending
garbage signals. There is also FlexTune which sends a tone to initially
calibrate, then the rest of the Doppler corrections are done mathematically
vs continuously sending garbage. Another thing of note, you're already
sending your voice, why add more? The other software is initially
calibrated manually then continues track with that offset automatically.
Seems better than loading a transponder with even more nonsense.
Personally, I don't see why people consider the linear transponders to me
so mystical. They're simple: signal goes in one point, out the other. Big
whoop. To tune just use a little bit of basic math skills that a 2nd grader
should possess and then turn the knobs till the voices sound right. Pretty
easy, right? Instead we have people who I've never heard on any satellite
(in my two years and 10,000 sat QSOs) suggesting complex and unnecessary
things to make operating on these satellites "easier", when most competent
ops already find them plenty easy.
73,
Gabe
AL6D/actuallyoperateslinearsats
On Fri, Apr 13, 2018 at 7:53 PM, Eric Fort <
eric.fort.listmail@??????????????.???> wrote:
> Computer control or actually a variation of such *IS* what I?m considering
> and proposing. Yes I have read ?the one true way?. I understand this
> manual tweaking is how it?s currently done. Why however are we adjusting
> only one frequency? It seems that we can adjust the transmit frequency so
> that it is always the same distance from the beacon as seen by the
> satellite and the receiver can automatically track the subduable tone
> transmitted. This means that you need not drift across the transponder and
> the rx station automatically tracks. What am I missing in this being hands
> off and always on frequency?
>
> AF6EP
>
> Sent using SMTP.
>
> > On Apr 13, 2018, at 7:49 PM, Andy <w5acm@??????.???> wrote:
> >
> > So VERY true!
> > Thanks Bruce,
> > ANDY w5acm
> >
> >
> > -----Original Message-----
> > From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of Bruce
> > Sent: Friday, April 13, 2018 9:40 PM
> > To: amsat-bb@?????.???
> > Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
> birds
> >
> > Sorry, this theory of thought is incorrect. You must adjust the higher
> of the two frequencies as it is most affected by Doppler. The true way to
> adjust is really to adjust both frequencies, however in the absence of
> computer control of both frequencies, you adjust the higher. Thus, if it is
> the receive frequency, then you adjust the receive, if it is the transmit,
> then you adjust the transmit. Holding the transmit frequency on the wrong
> band will cause you to walk across all the other QSO's taking place which
> is not a good practice.
> >
> > 73...bruce
> >
> >> On 4/13/2018 8:41 PM, Eric Fort wrote:
> >> I?ve had an idea for a long time as to making the satellites with
> linear transponders as easy to use as the FM ?easy sats ?. Consider the
> following:
> >>
> >> As I understand it, the goal is to adjust your transmitter such that
> your frequency at the satellite is constant.
> >>
> >> Our tracking program gives us range to the satellite and its velocity
> relative to us given our location and the orbital parameters. From this we
> should have computed Doppler for both transmit and receive.
> >>
> >> We also know the frequency at the satellite of the various beacons
> >> onboard. From this we can measure the doppler and work the other
> >> direction
> >>
> >> If we transmit a subaudable tone of known frequency we should be able
> >> to adjust the rx automatically by tracking the tone. (Acssb)
> >>
> >> Given these multiple ways of setting our tx/rx frequencies for our
> location can this not simply be automated to such a degree as to simply
> specify an offset from the beacon and operate as if it were a regular
> predictable opening on hf?
> >>
> >> Af6ep
> >>
> >> Sent using SMTP.
> >> _______________________________________________
> >> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring membership.
> >> Opinions expressed are solely those of the author, and do not reflect
> the official views of AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> >
> > --
> >
> > Bruce Paige, KK5DO
> >
> > AMSAT Director Contests and Awards
> > AMSAT Board Member 2016-2018
> >
> > ARRL Awards Field Checker (WAS, 5BWAS, VUCC), VE
> >
> > Houston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT* Also live
> streaming MP3 at http://www.amsatnet.com Podcast at
> http://www.amsatnet.com/podcast.xml or iTunes
> >
> > Latest satellite news on the ARRL Audio News http://www.arrl.org
> >
> > AMSAT on Twitter http://www.twitter.com/amsat
> >
> >
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions expressed
> > are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 3
Date: Sat, 14 Apr 2018 08:11:08 -0400
From: Bill Booth <ve3nxk@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID: <5AD1EFDC.406@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2018-04-13 9:41 PM, Eric Fort wrote:
> As I understand it, the goal is to adjust your transmitter such that your
frequency at the satellite is constant.
I have been on the sats since Oscar 6 and the RS series and it was the other
way
around I thought. You kept the transmit steady and adjusted the receiver.
I do
not use computer control of the rig. I suspect my log has 400 entries.
Did the standard method change or have I been doing it wrong all these years
--
Bill Booth VE3NXK
Sundridge ON, Canada
79.23.37 W x 45.46.18 N
FN05ns
Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
Organ and Tissue Donation - The Gift of Life
Talk to your family. Your decision can make a difference.
------------------------------
Message: 4
Date: Sat, 14 Apr 2018 12:29:40 +0000
From: Paul Stoetzer <n8hm@????.???>
To: Bill Booth <ve3nxk@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID:
<CABzOSOoTETLmAi2Nc_31r0JQrqEnRiU4DjFzS5NQ+Qn=EHx++g@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
The general guidance in the early years of operating linear transponders
was to adjust your transmitter to maintain a constant receive frequency.
Experience with the Mode J transponder on FO-12 caused the gudiance to be
updated to tuning the higher of the two frequencies. See the Sept 14, 1987
Amateur Satellite Report for more details (
http://www.ka9q.net/asr-1987.pdf).
With computer control, it?s a simple matter to adjust both your transmit
and receive frequencies once you get your software calibrated, but for
those tuning manually, the guidance is to tune the higher of the two
frequencies and leave the lower frequency as constant as possible.
Operating linear transponders takes a bit of practice, but it?s fairly easy
and becomes second nature after you get a dozen passes or so under your
belt. There?s no need to think up new schemes to make them ?easier.?
73,
Paul, N8HM
On Sat, Apr 14, 2018 at 08:19 Bill Booth <ve3nxk@?????.???> wrote:
> On 2018-04-13 9:41 PM, Eric Fort wrote:
> > As I understand it, the goal is to adjust your transmitter such that
> your frequency at the satellite is constant.
>
> I have been on the sats since Oscar 6 and the RS series and it was the
> other way
> around I thought. You kept the transmit steady and adjusted the
> receiver. I do
> not use computer control of the rig. I suspect my log has 400 entries.
>
> Did the standard method change or have I been doing it wrong all these
> years
>
> --
> Bill Booth VE3NXK
> Sundridge ON, Canada
> 79.23.37 W x 45.46.18 N
> FN05ns
>
> Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
>
> Organ and Tissue Donation - The Gift of Life
> Talk to your family. Your decision can make a difference.
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Sat, 14 Apr 2018 10:43:46 -0600
From: "Vince Fiscus, KB7ADL" <vlfiscus@???.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID: <5.2.1.1.2.20180414102112.00c4f208@???.?????????.???>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 12:29 PM 4/14/2018 +0000, Paul Stoetzer <n8hm@????.???>wrote:
>The general guidance in the early years of operating linear transponders
>was to adjust your transmitter to maintain a constant receive frequency.
>Experience with the Mode J transponder on FO-12 caused the gudiance to be
>updated to tuning the higher of the two frequencies. See the Sept 14, 1987
>Amateur Satellite Report for more details (
http://www.ka9q.net/asr-1987.pdf).
I've always tended to adjust the uplink to the satellite, even
on mode J. Never been chewed out for doing it that way though.
My question, for OM's doing computer control of their rigs. Is the
software following the rule, or is it adjusting both uplink and
downlink simultaneously?
I've always been curious about that.
Still using InstantTrack here. :-)
KB7ADL
------------------------------
Message: 6
Date: Sat, 14 Apr 2018 13:20:29 -0300
From: Pedro Converso <pconver@?????.???>
To: "Vince Fiscus, KB7ADL" <vlfiscus@???.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID:
<CANTZqKkc+FPqbcoAyCEqMAf0RuGmQJgKprO30y761yYDPto8Rg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello,
Regarding Dopplers, http://amsat.org.ar/pass implements 4 select-able ways
to follow Dopplers:
1) Both Uplink and Downlink Dopplers correction
2) Keep Uplink steady and modify Downlink
3) Keep Downlink steady and modify Uplink
4) Keep both Dopplers steady (No control)
1) Result: both stations QSOs like an HF SSB QSO (free hands, no tunning).
3) Result: for receiving station signal always on same frequency.
These can be applied either manually or thru CAT.
Thus allowing freedom of choice which way users prefer.
Appreciate and thanks users had suggested to implement these alternatives.
73, LU7ABF, Pedro
On Sat, Apr 14, 2018 at 1:43 PM, Vince Fiscus, KB7ADL <vlfiscus@???.???>
wrote:
> At 12:29 PM 4/14/2018 +0000, Paul Stoetzer <n8hm@????.???>wrote:
>
>> The general guidance in the early years of operating linear transponders
>> was to adjust your transmitter to maintain a constant receive frequency.
>> Experience with the Mode J transponder on FO-12 caused the gudiance to be
>> updated to tuning the higher of the two frequencies. See the Sept 14, 1987
>> Amateur Satellite Report for more details (
>> http://www.ka9q.net/asr-1987.pdf).
>>
>
>
> I've always tended to adjust the uplink to the satellite, even
> on mode J. Never been chewed out for doing it that way though.
>
> My question, for OM's doing computer control of their rigs. Is the
> software following the rule, or is it adjusting both uplink and
> downlink simultaneously?
>
> I've always been curious about that.
>
> Still using InstantTrack here. :-)
>
> KB7ADL
>
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 7
Date: Sat, 14 Apr 2018 11:21:37 -0500
From: Joe Werth <jcwerth1@?????.???>
To: "Vince Fiscus, KB7ADL" <vlfiscus@???.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Making the transponder sats as easy as the fm
birds
Message-ID: <DC774F07-E698-46EE-8536-0654ACC52423@?????.???>
Content-Type: text/plain; charset=us-ascii
Vince,
I computer control the uplink Doppler only and manually tune the RX
downlink, no matter if V/U or U\V. Seems to work for me.
Joe - KE9AJ
Sent from my iPad
> On Apr 14, 2018, at 11:43 AM, Vince Fiscus, KB7ADL <vlfiscus@???.???> wrote:
>
> At 12:29 PM 4/14/2018 +0000, Paul Stoetzer <n8hm@????.???>wrote:
>> The general guidance in the early years of operating linear transponders
was to adjust your transmitter to maintain a constant receive frequency.
Experience with the Mode J transponder on FO-12 caused the gudiance to be
updated to tuning the higher of the two frequencies. See the Sept 14, 1987
Amateur Satellite Report for more details ( http://www.ka9q.net/asr-1987.pdf).
>
>
> I've always tended to adjust the uplink to the satellite, even
> on mode J. Never been chewed out for doing it that way though.
>
> My question, for OM's doing computer control of their rigs. Is the
> software following the rule, or is it adjusting both uplink and
> downlink simultaneously?
>
> I've always been curious about that.
>
> Still using InstantTrack here. :-)
>
> KB7ADL
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Sat, 14 Apr 2018 16:15:08 +0000
From: Mike Meadows <g4gug161@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Subject: Making the transponder sats as easy as
the fm birds
Message-ID:
<CAB5qWGywo2NsuyW=JvJwQn5orhRmkObh8QWXwvjTW8ci5HqU2Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello there.
What would be very helpful for complete beginners, like me.
We need a knowledgeable unbiased review of all full duplex tx/rx's . With
locked vfo's to maintain a fixed split to save operators moving around
within bandwidth of transponders, when used manually.
Also really helpful would be a review of all cat/ doppler tracking software
when associated with these radios.
To my knowledge, not that many models from mainstream manufacturers, have
this facility.
Excuse my naivety, asking this question.
Please don't flame me.
73 Mike G4GUG.
------------------------------
Message: 9
Date: Sat, 14 Apr 2018 14:20:21 -0600
From: Ron VE8RT <ve8rt@?????.??>
To: amsat-bb@?????.???
Subject: [amsat-bb] Field portable multi-mode duplex options?
Message-ID: <20180414142021.bfd087e2bab5052d714b6c82@?????.??>
Content-Type: text/plain; charset=US-ASCII
The FT-818 might have been of interest if it had cross-band duplex
capability, but I don't believe it does. I'd prefer to see a model
from Elecraft that did. There do not seem to be many battery friendly
portable options for satellite operation. I'd like to know if there
are.
Ron VE8RT
--
Ron VE8RT <ve8rt@?????.??>
------------------------------
Message: 10
Date: Sat, 14 Apr 2018 21:17:38 +0000
From: Rolf Krogstad <rolf.krogstad@?????.???>
To: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: [amsat-bb] Antenna switching
Message-ID:
<CAJJyj=YMQbW6WVyZ2V4CCKDxo4bxp2Qi99iWRm6wzNH8Lpewow@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
In the shack I am finally starting to use my Funcube Dongle Pro Plus with
SDR-Console 3 and really am liking the combo, especially for the linear
birds.
The one downside is having to manually unscrew coax connectors to swap the
antennas from receiver to transmitter and vice versa when going from V/U to
U/V and U/V to V/U.
I don't want to use multiple antenna switches because if I or a guest op
doesn't set them properly I could blow the front end of the receiver.
Does anyone have an idiot-proof solution for throwing one switch and having
the two antennas swapped between rcvr and xmtr?
Tnx es 73
Rolf NR0T
EN34it
------------------------------
Message: 11
Date: Sat, 14 Apr 2018 18:13:27 -0400
From: Mike Diehl <diehl.mike.a@?????.???>
To: Rolf Krogstad <rolf.krogstad@?????.???>
Cc: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Antenna switching
Message-ID: <E44DF7EB-87A9-466D-BAFB-F79FEF2B65A2@?????.???>
Content-Type: text/plain; charset=us-ascii
Maybe something like this would work?
https://www.birdrf.com/Products/Radio%20Infrastructure/RF%20Components/RF-Coax
ial-Selector-Switches/72-R_Reversing-Coaxial-Selector-Switch.aspx
73,
Mike Diehl
W8LID
> On Apr 14, 2018, at 17:17, Rolf Krogstad <rolf.krogstad@?????.???> wrote:
>
> In the shack I am finally starting to use my Funcube Dongle Pro Plus with
> SDR-Console 3 and really am liking the combo, especially for the linear
> birds.
>
> The one downside is having to manually unscrew coax connectors to swap the
> antennas from receiver to transmitter and vice versa when going from V/U to
> U/V and U/V to V/U.
>
> I don't want to use multiple antenna switches because if I or a guest op
> doesn't set them properly I could blow the front end of the receiver.
>
> Does anyone have an idiot-proof solution for throwing one switch and having
> the two antennas swapped between rcvr and xmtr?
>
> Tnx es 73
> Rolf NR0T
> EN34it
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Sat, 14 Apr 2018 15:30:38 -0700 (PDT)
From: "jim@?????.???? <jim@?????.???>
To: "AMSAT BB" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Antenna switching
Message-ID: <1523745038.645919253@????.?????????.???>
Content-Type: text/plain;charset=UTF-8
Yes, that Bird would do great, but you would not like the price!
Current new price: $2,058.61
There is a used one on eham.com for only $485.00 OBO
http://www.eham.net/classifieds/detail/434149
73
-----
Jim Walls - K6CCC
jim@?????.???
-----Original Message-----
From: "Mike Diehl" <diehl.mike.a@?????.???>
Sent: Saturday, April 14, 2018 15:13
To: "Rolf Krogstad" <rolf.krogstad@?????.???>
Cc: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Antenna switching
Maybe something like this would work?
https://www.birdrf.com/Products/Radio%20Infrastructure/RF%20Components/RF-Coax
ial-Selector-Switches/72-R_Reversing-Coaxial-Selector-Switch.aspx
73,
Mike Diehl
W8LID
> On Apr 14, 2018, at 17:17, Rolf Krogstad <rolf.krogstad@?????.???> wrote:
>
> In the shack I am finally starting to use my Funcube Dongle Pro Plus with
> SDR-Console 3 and really am liking the combo, especially for the linear
> birds.
>
> The one downside is having to manually unscrew coax connectors to swap the
> antennas from receiver to transmitter and vice versa when going from V/U to
> U/V and U/V to V/U.
>
> I don't want to use multiple antenna switches because if I or a guest op
> doesn't set them properly I could blow the front end of the receiver.
>
> Does anyone have an idiot-proof solution for throwing one switch and having
> the two antennas swapped between rcvr and xmtr?
>
> Tnx es 73
> Rolf NR0T
> EN34it
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
73
-----
Jim Walls - K6CCC
jim@?????.???
------------------------------
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!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 13, Issue 135
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