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CX2SA > SATDIG 30.05.09 17:03l 987 Lines 32831 Bytes #999 (0) @ WW
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Today's Topics:
1. eggbeater rx performance (Eric Fort)
2. Satpc32 ooops (w7lrd@xxxxxxx.xxxx
3. Re: eggbeater rx performance (Mark Lunday)
4. Re: Satpc32 ooops (Glenn AA5PK)
5. Re: eggbeater rx performance (Steve Bluemel)
6. Re: eggbeater rx performance (Eric Fort)
7. Re: eggbeater rx performance (Mark Lunday)
8. Re: eggbeater rx performance (Mark Lunday)
9. Re: eggbeater rx performance (w7lrd@xxxxxxx.xxxx
10. Re: eggbeater rx performance (Greg D.)
11. Re: eggbeater rx performance (Dave Guimont)
12. Re: eggbeater rx performance (n3tl@xxxxxxxxx.xxxx
13. Re: FT-847 vs IC-910 (Wayne Estes)
14. Re: eggbeater rx performance (Art McBride)
15. Re: FT-847 vs IC-910 (Jim Jerzycke)
16. Re: eggbeater rx performance (Greg D.)
----------------------------------------------------------------------
Message: 1
Date: Fri, 29 May 2009 18:17:17 -0700
From: Eric Fort <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] eggbeater rx performance
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430905291817k762c2bb1ib8d12a97d9659c31@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
without using rotors or directional antennas and maybe while mobile. Uplink
seems not to be a problem as one can always QRO to a level where the
satellite sees an apropriate signal level that is enough but without robing
power from other transponder users. On recieve though you still gotta be
able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
decently or is there another (better) way? Is working mobile and/or without
directional antennas even practical? what's the best way to do it?
Thanks,
Eric
AF6EP
------------------------------
Message: 2
Date: Sat, 30 May 2009 02:00:12 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Satpc32 ooops
To: amsat-bb@xxxxx.xxx
Message-ID:
<561621878.6830351243648812654.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.
xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello
While using satpc32 with the lvbtracker I get a Ungulltige Gleitkammaoperation
error message along with that bad "thunk" sound.? What's going on??
73 Bob W7LRD
------------------------------
Message: 3
Date: Fri, 29 May 2009 22:46:50 -0400
From: "Mark Lunday" <mlunday@xx.xx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <eric.fort@xxxxx.xxx>, "'Amsat BB'" <amsat-bb@xxxxx.xxx>
Message-ID: <000f01c9e0d0$e26d40c0$a747c240$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Eric
Couple of thoughts for you:
No need for QRO, in my opinion. You can solve it all with a good antenna
setup.
Regarding antennas...nothing against eggbeaters, but you can accomplish
everything with a simple antenna setup, including mobile: Look for Elk
antennas and Arrow antennas, hand held and directional. Lots of great
success w/o anything other than 5 watts and one of those antennas. Ask
WD9EWK and N3TL, who have proven this over and over.
Mark Lunday
WD4ELG
wd4elg@xxxx.xxx
http://wd4elg.net
------------------------------
Message: 4
Date: Fri, 29 May 2009 21:54:08 -0500
From: "Glenn AA5PK" <aa5pk@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Satpc32 ooops
To: <amsat-bb@xxxxx.xxx>
Message-ID: <2D17A17D0CAA4128A67D520866D359C9@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Bob,
That messages translates to "Invalid floating decimal point operation," so
perhaps reload the software?
Glenn AA5PK
------------------------------
Message: 5
Date: Sat, 30 May 2009 03:16:46 +0000
From: "Steve Bluemel" <stevebluemel@xxxxx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: eric.fort@xxxxx.xxxx AMSAT-BB@xxxxx.xxx
Message-ID:
<841184508-1243653378-cardhu_decombobulator_blackberry.rim.net-17096807-
@xxxxxxx.xxxx.xxxx.xx.xxxxxxxxxx>
Content-Type: text/plain
Hey Eric,
I aggree with the comments on the hand held antenna. I use the Elk exclusively
at this point but would like to find a base antenna option. I cannot use beams
of rotored antennas as I just don't have the real estate.
I have met folks on this board who totaly believe in eggbeaters, but I cannot
afford to buy one only to learn that it didn't meet expectations. I have been
building some, but haven't quite worked it out yet.
I have built a turnstyle for 440 with an AAR preamp. It isn't great, but it
shows some promise.
I will follow this thread and hope we both find our solutions
73! Steve. KI6OQU
Sent via BlackBerry by AT&T
-----Original Message-----
From: Eric Fort <eric.fort@xxxxx.xxx>
Date: Fri, 29 May 2009 18:17:17
To: Amsat BB<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] eggbeater rx performance
I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
without using rotors or directional antennas and maybe while mobile. Uplink
seems not to be a problem as one can always QRO to a level where the
satellite sees an apropriate signal level that is enough but without robing
power from other transponder users. On recieve though you still gotta be
able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
decently or is there another (better) way? Is working mobile and/or without
directional antennas even practical? what's the best way to do it?
Thanks,
Eric
AF6EP
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Fri, 29 May 2009 20:17:47 -0700
From: Eric Fort <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: Mark Lunday <mlunday@xx.xx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430905292017n7e342608w803a7d2ef607fe8@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I have an arrow. It's just sorta difficult to point when in motion. Is the
pattern from a standard mobile whip really enough considering polorization
and radiation angle or would something else be more effective? I'm looking
to move from working portable to truly mobile.
Eric
AF6EP
On Fri, May 29, 2009 at 7:46 PM, Mark Lunday <mlunday@xx.xx.xxx> wrote:
> Eric
>
> Couple of thoughts for you:
>
>
> No need for QRO, in my opinion. You can solve it all with a good antenna
> setup.
>
> Regarding antennas...nothing against eggbeaters, but you can accomplish
> everything with a simple antenna setup, including mobile: Look for Elk
> antennas and Arrow antennas, hand held and directional. Lots of great
> success w/o anything other than 5 watts and one of those antennas. Ask
> WD9EWK and N3TL, who have proven this over and over.
>
>
>
> Mark Lunday
> WD4ELG
> wd4elg@xxxx.xxx
> http://wd4elg.net
>
>
>
>
------------------------------
Message: 7
Date: Sat, 30 May 2009 00:08:53 -0400
From: "Mark Lunday" <mlunday@xx.xx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <stevebluemel@xxxxx.xxx>, <eric.fort@xxxxx.xxx>,
<AMSAT-BB@xxxxx.xxx>
Message-ID: <002a01c9e0dc$58a2eff0$09e8cfd0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Steve
I took a shovel handle, a Radio Shack el cheapo rotor, some electrical tape,
and taped an Elk to the shovel handle in the attic. 30 degrees fixed
elevation. Rotate within 30 degrees azimuth during the pass. Works like a
charm.
Mark Lunday
WD4ELG
wd4elg@xxxx.xxx
http://wd4elg.net
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Steve Bluemel
Sent: Friday, May 29, 2009 11:17 PM
To: eric.fort@xxxxx.xxxx AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] Re: eggbeater rx performance
Hey Eric,
I aggree with the comments on the hand held antenna. I use the Elk
exclusively at this point but would like to find a base antenna option. I
cannot use beams of rotored antennas as I just don't have the real estate.
I have met folks on this board who totaly believe in eggbeaters, but I
cannot afford to buy one only to learn that it didn't meet expectations. I
have been building some, but haven't quite worked it out yet.
I have built a turnstyle for 440 with an AAR preamp. It isn't great, but it
shows some promise.
I will follow this thread and hope we both find our solutions
73! Steve. KI6OQU
Sent via BlackBerry by AT&T
-----Original Message-----
From: Eric Fort <eric.fort@xxxxx.xxx>
Date: Fri, 29 May 2009 18:17:17
To: Amsat BB<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] eggbeater rx performance
I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
without using rotors or directional antennas and maybe while mobile. Uplink
seems not to be a problem as one can always QRO to a level where the
satellite sees an apropriate signal level that is enough but without robing
power from other transponder users. On recieve though you still gotta be
able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
decently or is there another (better) way? Is working mobile and/or without
directional antennas even practical? what's the best way to do it?
Thanks,
Eric
AF6EP
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Sat, 30 May 2009 00:10:32 -0400
From: "Mark Lunday" <mlunday@xx.xx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <eric.fort@xxxxx.xxx>
Cc: 'Amsat BB' <amsat-bb@xxxxx.xxx>
Message-ID: <002b01c9e0dc$93a0b6a0$bae223e0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Good question. With Arrow/Elk, it is directional. Good gain but not omni.
With whip it is omni, but reduced gain.
Don't know of anyone who operated while driving, so I cannot help you with
that one. Maybe eggbeater is the way to go.
Mark Lunday
WD4ELG
<mailto:wd4elg@xxxx.xxx> wd4elg@xxxx.xxx
<http://wd4elg.net> http://wd4elg.net
From: Eric Fort [mailto:eric.fort@xxxxx.xxxx
Sent: Friday, May 29, 2009 11:18 PM
To: Mark Lunday
Cc: Amsat BB
Subject: Re: [amsat-bb] eggbeater rx performance
I have an arrow. It's just sorta difficult to point when in motion. Is the
pattern from a standard mobile whip really enough considering polorization
and radiation angle or would something else be more effective? I'm looking
to move from working portable to truly mobile.
Eric
AF6EP
On Fri, May 29, 2009 at 7:46 PM, Mark Lunday <mlunday@xx.xx.xxx> wrote:
Eric
Couple of thoughts for you:
No need for QRO, in my opinion. You can solve it all with a good antenna
setup.
Regarding antennas...nothing against eggbeaters, but you can accomplish
everything with a simple antenna setup, including mobile: Look for Elk
antennas and Arrow antennas, hand held and directional. Lots of great
success w/o anything other than 5 watts and one of those antennas. Ask
WD9EWK and N3TL, who have proven this over and over.
Mark Lunday
WD4ELG
wd4elg@xxxx.xxx
http://wd4elg.net
------------------------------
Message: 9
Date: Sat, 30 May 2009 04:17:49 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Re: eggbeater rx performance
To: eric fort <eric.fort@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID:
<1640664383.6855391243657069522.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx
.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Just about everyone I know that started out with eggbeaters now has
directional antennas.
73 Bob W7LRD
----- Original Message -----
From: "Eric Fort" <eric.fort@xxxxx.xxx>
To: "Amsat BB" <amsat-bb@xxxxx.xxx>
Sent: Friday, May 29, 2009 6:17:17 PM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] ?eggbeater rx performance
I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
without using rotors or directional antennas and maybe while mobile. ?Uplink
seems not to be a problem as one can always QRO to a level where the
satellite sees an apropriate signal level that is enough but without robing
power from other transponder users. ?On recieve though you still gotta be
able to hear 'em to work 'em. ?Is an eggbeater and a preamp enough to hear
decently or is there another (better) way? ?Is working mobile and/or without
directional antennas even practical? ?what's the best way to do it?
Thanks,
Eric
AF6EP
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Fri, 29 May 2009 21:23:46 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <mlunday@xx.xx.xxx>, <eric.fort@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <BLU133-W19EFBFCCC7E787265CA7B6A94E0@xxx.xxx>
Content-Type: text/plain; charset="Windows-1252"
Many years ago I worked the MIR space station while driving to work. I was
headed West on I-80, and MIR had just come up on the horizon. Admittedly it
had a lot higher power, and a lower orbit, but he was full quieting on FM into
my Larsen 2/70 glass mount. I wouldn't be surprised if you could get a fair
signal with a whip antenna and a good preamp running SSB on FO-29.
I'm not going to encourage anyone to operate CW while driving! Even for SSB,
get your rig hooked up to a small laptop with automatic doppler tracking, and
set it up before departing, or you might just shift yourself off the road and
into a tree. That might damage the rig.
Greg KO6TH
> From: mlunday@xx.xx.xxx
> To: eric.fort@xxxxx.xxx
> Date: Sat, 30 May 2009 00:10:32 -0400
> CC: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: eggbeater rx performance
>
> Good question. With Arrow/Elk, it is directional. Good gain but not omni.
> With whip it is omni, but reduced gain.
>
>
>
> Don't know of anyone who operated while driving, so I cannot help you with
> that one. Maybe eggbeater is the way to go.
>
>
>
>
>
> Mark Lunday
>
> WD4ELG
>
_________________________________________________________________
Hotmail? has ever-growing storage! Don?t worry about storage limits.
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_
Storage1_052009
------------------------------
Message: 11
Date: Fri, 29 May 2009 21:43:04 -0700
From: Dave Guimont <dguimon1@xxx.xx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: eric.fort@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <20090530044314848.STDR3923@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
>I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
>without using rotors or directional antennas and maybe while mobile. Uplink
>seems not to be a problem as one can always QRO to a level where the
>satellite sees an apropriate signal level that is enough but without robing
>power from other transponder users. On recieve though you still gotta be
>able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
>decently or is there another (better) way? Is working mobile and/or without
>directional antennas even practical? what's the best way to do it?
Eric,
Go to:
http://tinyurl.com/wb6lloOscar
And try the quadrifilars...You wont get much at low ELs, but on a
decent pass you will copy...use low loss coax, and good N connectors.
See the folder Antennaevaluation for some testing we've done..
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 12
Date: Sat, 30 May 2009 04:54:46 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: eggbeater rx performance
To: "Greg D." <ko6th_greg@xxxxxxx.xxx>, <mlunday@xx.xx.xxx>,
<eric.fort@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<053020090454.20279.4A20BC1600089C2D00004F3722218865869B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Greg and all,
I must respectfully disagree - unless we have different definitions of what
constitutes a fair signal. The carious satellite-description pages on the
AMSAT Web site include information about transmit power for all of the
satellites. All of them except AO-7 are transmitting nominally at power levels
less than 1 watt.
If anyone following this thread remembers the special operating mode the ISS
repeater was in during December, for the 25th anniverary, you may recall that
ARISS announed it would be a "low power" operation, which I believe meant 5
watts out. Somebody correct me if I'm wrong about that. Even at 5 watts, the
ISS, was so strong one almost didn't have to Doppler-tune for the downlink,
and it was on UHF! For the special operating period, they put the repeater in
Mode J instead of the usual Mode B.
My point is that the ISS, which is in an orbit quite a bit lower than our
satellites, was transmitting with more than 5 times the power of our FM and
most of the linear satellites. My experience with mobile operation has been
that I do best with AO-27 and SO-50. Both of them use 0-gain, quarter-wave
verticals mounted on one corner of the satellite.My vertical likes their
verticals ... hihi.
Dave is right about the quadrafiliars, by the way - I just saw his post come
in as I was typing this. Contact Allen, N5AFV, who has picked up one of the
Antennas US quadrafiliars, and he's using it mobile with pretty good success.
Eric, if you're interested in truly mobile operation, your decision will
involve a compromise. You will not get the same "coverage" during a pass that
you get with either the Arrow or the Elk when you are parked and pointing.
Your "operating window" will be more narrow. But it's definitely do-able. I
was shocked to work Craig, KL4E, in Anchorage a couple weeks ago from
southwest Missouri. We worked on AO-27, and I was using my Yaesu VX-7R HT and
an MFJ 1729 dual-band mag mount. That pass was a maximum elevation of 16
degrees to my location, which was just east of Seymour, Mo., along the side of
U.S. 60 on a county road. I had about a minute of readable copy, and I was in
a location with a "look" toward the satellite that was flatter and more
unobstructed than what I routinely deal with at home. If I'd gotten to that
spot in time to assemble the Elk, I would have been able to work from at least
3 degrees elevation coming up to 3 degrees going down. That's my nominal
AOS/LOS cutoff with the handheld Elk. Using the Elk would've given me several
minutes of the pass, instead of just 1 on the vertical. That's where the
compromise of an omni directional antenna comes in.
Whichever way you go, have fun with it!
Thanks, Mark, for the kind words about the operating Patrick and I are doing
with our portable stations. It far exceeds anything I expected.
73 to all,
Tim - N3TL
Athens, Ga. - EM84ha
-------------- Original message from "Greg D." <ko6th_greg@xxxxxxx.xxx>: -----
---------
> Many years ago I worked the MIR space station while driving to work. I was
headed West on I-80, and MIR had just come up on the horizon. Admittedly it
had a lot higher power, and a lower orbit, but he was full quieting on FM into
my Larsen 2/70 glass mount. I wouldn't be surprised if you could get a fair
signal
> with a whip antenna and a good preamp running SSB on FO-29.
> I'm not going to encourage anyone to operate CW while driving! Even for SSB,
get your rig hooked up to a small laptop with automatic doppler tracking, and
set it up before departing, or you might just shift yourself off the road and
> into a tree. That might damage the rig.
>
> Greg KO6TH
>
>
> > From: mlunday@xx.xx.xxx
> > To: eric.fort@xxxxx.xxx
> > Date: Sat, 30 May 2009 00:10:32 -0400
> > CC: amsat-bb@xxxxx.xxx
> > Subject: [amsat-bb] Re: eggbeater rx performance
> >
> > Good question. With Arrow/Elk, it is directional. Good gain but not omni.
> > With whip it is omni, but reduced gain.
> >
> >
> >
> > Don't know of anyone who operated while driving, so I cannot help you with
> > that one. Maybe eggbeater is the way to go.
> >
> >
> >
> >
> >
> > Mark Lunday
> >
> > WD4ELG
> >
>
> _________________________________________________________________
> Hotmail¶© has ever-growing storage! Donƒ_Tt worry about storage limits.
>
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_
St
> orage1_052009
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 13
Date: Sat, 30 May 2009 00:00:50 -0500
From: Wayne Estes <w9ae@xxxxxxx.xxx>
Subject: [amsat-bb] Re: FT-847 vs IC-910
To: amsat-bb@xxxxx.xxx
Message-ID: <4A20BD82.6080306@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Not all FT-847's are alike. A stock FT-847 has wide, low-Q ceramic IF
filters. My FT-847 has INRAD CW and SSB crystal filters that give
narrower IF bandwidth, with MUCH higher Q. I haven't compared them, but
I suspect that a FT-847 receiver with quality IF filters performs
roughly on par with an IC-910.
If shopping for a used FT-847, look for one with optional IF filters.
Collins mechanical filters are an improvement over the stock ceramic
filters, but crystal filters are even better.
Wayne Estes W9AE
Oakland, Oregon, USA
------------------------------
Message: 14
Date: Fri, 29 May 2009 22:08:13 -0700
From: "Art McBride" <kc6uqh@xxx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <eric.fort@xxxxx.xxx>, "'Amsat BB'" <amsat-bb@xxxxx.xxx>
Message-ID: <A5AAB2A80E7A4DDF9DD9045B1379435C@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Eric,
A Quadrifilar Helix antenna will meet your needs, and if you choose 1
wavelength, 1 turn design you will have a greater gain at the horizon than
at the zenith which is what you need to compensate for the change in
satellite distance to the observer over the entire pass.
It is also circular giving excellent rejection to ground and building
reflections that cause QSB. The designs were developed by C.C. Kilgus MSEE
in the mid to late 60's. Designs vary from 1/4 Wave, 1/4 turn to 1 wave
length, 1 turn. His work was published in the December 1970 Microwave
Journal beginning on Pg 49.
Art,
KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Eric Fort
Sent: Friday, May 29, 2009 6:17 PM
To: Amsat BB
Subject: [amsat-bb] eggbeater rx performance
I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
without using rotors or directional antennas and maybe while mobile. Uplink
seems not to be a problem as one can always QRO to a level where the
satellite sees an apropriate signal level that is enough but without robing
power from other transponder users. On recieve though you still gotta be
able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
decently or is there another (better) way? Is working mobile and/or without
directional antennas even practical? what's the best way to do it?
Thanks,
Eric
AF6EP
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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Message: 15
Date: Fri, 29 May 2009 22:28:52 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: FT-847 vs IC-910
To: amsat-bb@xxxxx.xxxx Wayne Estes <w9ae@xxxxxxx.xxx>
Message-ID: <583658.802.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I agree with Wayne. I added a 2.1kHz INRAD filter on the receive side, and a
Collins mechanical filter on the transmit side. The receive improved
tremendously, even the DSP works better, and my local friends tell me the
transmit audio sounds more natural.
I've never used a '910, so my observations are strictly relevant to the '847.
73, Jim KQ6EA
--- On Fri, 5/29/09, Wayne Estes <w9ae@xxxxxxx.xxx> wrote:
> From: Wayne Estes <w9ae@xxxxxxx.xxx>
> Subject: [amsat-bb] Re: FT-847 vs IC-910
> To: amsat-bb@xxxxx.xxx
> Date: Friday, May 29, 2009, 10:00 PM
> Not all FT-847's are alike.? A
> stock FT-847 has wide, low-Q ceramic IF
> filters.? My FT-847 has INRAD CW and SSB crystal
> filters that give
> narrower IF bandwidth, with MUCH higher Q.? I haven't
> compared them, but
> I suspect that a FT-847 receiver with quality IF filters
> performs
> roughly on par with an IC-910.
>
> If shopping for a used FT-847, look for one with optional
> IF filters.
> Collins mechanical filters are an improvement over the
> stock ceramic
> filters, but crystal filters are even better.
>
> Wayne Estes W9AE
> Oakland, Oregon, USA
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx.
> Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur
> satellite program!
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>
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Message: 16
Date: Fri, 29 May 2009 22:56:54 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: eggbeater rx performance
To: <n3tl@xxxxxxxxx.xxx>, <mlunday@xx.xx.xxx>, <eric.fort@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <BLU133-W16ECCF7CAF94F3EF9B1AB6A94E0@xxx.xxx>
Content-Type: text/plain; charset="Windows-1252"
Hi Tim,
Actually I think we do agree on this. That some, when things align, can work
satellite with an HT and a whip antenna, tells me that working satellite while
mobile with a groundplane antenna and a preamp is possible, if not
occasionally likely. It certainly won't be as reliable or smooth as the local
repeater, but then those same some people would offer that the local repeater
is not as much fun either.
One might also suggest that the only thing more exciting than working
satellite while mobile, is driving fast enough to require re-doing the Doppler
shift calculation... :-)
Greg KO6TH
From: n3tl@xxxxxxxxx.xxx
To: ko6th_greg@xxxxxxx.xxxx mlunday@xx.xx.xxxx eric.fort@xxxxx.xxx
CC: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Re: eggbeater rx performance
Date: Sat, 30 May 2009 04:54:46 +0000
Greg and all,
I must respectfully disagree - unless we have different definitions of what
constitutes a fair signal. The carious satellite-description pages on the
AMSAT Web site include information about transmit power for all of the
satellites. All of them except AO-7 are transmitting nominally at power levels
less than 1 watt.
If anyone following this thread remembers the special operating mode the ISS
repeater was in during December, for the 25th anniverary, you may recall that
ARISS announed it would be a "low power" operation, which I believe meant 5
watts out. Somebody correct me if I'm wrong about that. Even at 5 watts, the
ISS, was so strong one almost didn't have to Doppler-tune for the downlink,
and it was on UHF! For the special operating period, they put the repeater in
Mode J instead of the usual Mode B.
My point is that the ISS, which is in an orbit quite a bit lower than our
satellites, was transmitting with more than 5 times the power of our FM and
most of the linear satellites. My experience with mobile operation has been
that I do best with AO-27 and SO-50. Both of them use 0-gain, quarter-wave
verticals mounted on one corner of the satellite.My vertical likes their
verticals ... hihi.
Dave is right about the quadrafiliars, by the way - I just saw his post come
in as I was typing this. Contact Allen, N5AFV, who has picked up one of the
Antennas US quadrafiliars, and he's using it mobile with pretty good success.
Eric, if you're interested in truly mobile operation, your decision will
involve a compromise. You will not get the same "coverage" during a pass that
you get with either the Arrow or the Elk when you are parked and pointing.
Your "operating window" will be more narrow. But it's definitely do-able. I
was shocked to work Craig, KL4E, in Anchorage a couple weeks ago from
southwest Missouri. We worked on AO-27, and I was using my Yaesu VX-7R HT and
an MFJ 1729 dual-band mag mount. That pass was a maximum elevation of 16
degrees to my location, which was just east of Seymour, Mo., along the side of
U.S. 60 on a county road. I had about a minute of readable copy, and I was in
a location with a "look" toward the satellite that was flatter and more
unobstructed than what I routinely deal with at home. If I'd gotten to that
spot in time to assemble the Elk, I would have been able to work from at least
3 degrees elevation coming up to 3 degrees going down. That's my nominal
AOS/LOS cutoff with the handheld Elk. Using the Elk would've given me several
minutes of the pass, instead of just 1 on the vertical. That's where the
compromise of an omni directional antenna comes in.
Whichever way you go, have fun with it!
Thanks, Mark, for the kind words about the operating Patrick and I are doing
with our portable stations. It far exceeds anything I expected.
73 to all,
Tim - N3TL
Athens, Ga. - EM84ha
-------------- Original message from "Greg D." <ko6th_greg@xxxxxxx.xxx>: -----
---------
> Many years ago I worked the MIR space station while driving to work. I was
headed West on I-80, and MIR had just come up on the horizon. Admittedly it
had a lot higher power, and a lower orbit, but he was full quieting on FM into
my Larsen 2/70 glass mount. I wouldn't be surprised if you could get a fair
signal
> with a whip antenna and a good preamp running SSB on FO-29.
> I'm not going to encourage anyone to operate CW while driving! Even for SSB,
get your rig hooked up to a small laptop with automatic doppler tracking, and
set it up before departing, or you might just shift yourself off the road and
> into a tree. That might damage the rig.
>
> Greg KO6TH
>
>
> > From: mlunday@xx.xx.xxx
> > To: eric.fort@xxxxx.xxx
> > Date: Sat, 30 May 2009 00:10:32 -0400
> > CC: amsat-bb@xxxxx.xxx
> > Subject: [amsat-bb] Re: eggbeater rx performance
> >
> > Good question. With Arrow/Elk, it is directional. Good gain but not omni.
> > With whip it is omni, but reduced gain.
> >
> >
> >
> > Don't know of anyone who operated while driving, so I cannot help you with
> > that one. Maybe eggbeater is the way to go.
> >
> >
> >
> >
> >
> > Mark Lunday
> >
> > WD4ELG
> >
>
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