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CX2SA > SATDIG 17.04.10 04:26l 994 Lines 31853 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Arecibo and circular polarization using cheap yagis (i8cvs)
2. Re: Arecibo (Bill Dzurilla)
3. Arecibo (Bob- W7LRD)
4. Re: Arecibo heard (Mark L. Hammond)
5. Re: Arecibo (Edward Cole)
6. FW: Re: AO-7 is not OK (ps8rf Piraja)
7. AGWPE and Window 7 problems (D. Craig Fox)
8. Radios for satellite operations (Jacob Tennant)
9. Re: Arecibo (Luc Leblanc)
10. Re: Arecibo (Luc Leblanc)
11. Re: Radios for satellite operations (Michael Tondee)
12. Re: Arecibo (Rick - WA4NVM)
13. Re: Radios for satellite operations (Gary "Joe" Mayfield)
14. Re: Arecibo and circular polarization using cheap yagis (i8cvs)
15. Re: Arecibo and circular polarization using cheap yagis
(Idle-Tyme)
16. Re: Arecibo (i8cvs)
17. LVB Tracker USB serial port driver for Windows 7 x64?
(Bill Bordy, NJ1H )
18. Re: Radios for satellite operations (John Neeley)
----------------------------------------------------------------------
Message: 1
Date: Fri, 16 Apr 2010 21:12:45 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Arecibo and circular polarization using cheap
yagis
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, "Douglas Quagliana"
<dquagliana@xxx.xxx>, "amsat" <amsat-bb@xxxxx.xxx>, "Edward Cole"
<kl7uw@xxxxxxxxx.xxx>
Message-ID: <000d01cadd98$cc124f80$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Rick, WA4NVM
Plese look at the two last drawing of the SV1BSX page:
http://sv1bsx.50webs.com/antenna-pol/polarization.html
You will see that the polarity marked (+) over the dipoles are correct for
both the clockwice CW or RHCP polarization as well for the counterclockwise
CCW or LHCP polarization.
By the way the drawings of the circular pats of the wave along the antennas
are wrong and must be inverted. The green path on the top picture is LHCP
and must be inverted with the red path in the bottom picture wich is RHCP
Sorry I can't informe my very good friend Mak SV1BSX because unfortunately
the last year he went SK but he did a very beautiful job.
73" de
i8CVS Domenico
----- Original Message -----
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
To: "i8cvs" <domenico.i8cvs@xxx.xx>; "Douglas Quagliana"
<dquagliana@xxx.xxx>; "amsat" <amsat-bb@xxxxx.xxx>; "Edward Cole"
<kl7uw@xxxxxxxxx.xxx>
Sent: Friday, April 16, 2010 6:25 PM
Subject: Re: [amsat-bb] Re: Arecibo and circular polarization using cheap
yagis
> Hi All,
>
> A picture is worth a thousand words.........
>
> http://sv1bsx.50webs.com/antenna-pol/polarization.html
>
> Maybe this will help......
>
> 73, Rick WA4NVM
Hi Rick, WA4NVM
Plese look at the two last drawing of the SV1BSX page:
http://sv1bsx.50webs.com/antenna-pol/polarization.html
You will see that the polarity marked (+) over the dipoles are correct for
both the clockwice CW or RHCP polarization as well for the counterclockwise
CCW or LHCP polarization.
By the way the drawings of the circular pats of the wave along the antennas
are wrong and must be inverted. The green path on the top picture is LHCP
and must be inverted with the red path in the bottom picture wich is RHCP
Sorry I can't informe my very good friend Mak SV1BSX because unfortunately
the last year he went SK but he did a very beautiful job.
73" de
i8CVS Domenico
------------------------------
Message: 2
Date: Fri, 16 Apr 2010 12:27:03 -0700 (PDT)
From: Bill Dzurilla <billdz.geo@xxxxx.xxx>
Subject: [amsat-bb] Re: Arecibo
To: amsat-bb@xxxxx.xxx
Message-ID: <19877.2742.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I'm at work and not QRV, but I had no problem copying them with a single 12
el. yagi leaned again the chair when they did the test a couple of weeks
ago, and most everyone else gave them good reports. At the time, they were
running 50w, a barefoot Kenwood TS-2000. They must have changed rigs if now
they only have 20w. And something else must be wrong, because even folks
with big antennas are having trouble copying them (more so than the 50w vs.
20w would suggest).
There's a live feed at http://www.ustream.tv/channel/kp4ao-eme
Good luck and 73,
Bill NZ5N
> From: Sebastian <w4as@xxxxxxxxx.xxx>
> Subject: [amsat-bb] Re: Arecibo
> To: "Mark L.Hammond" <marklhammond@xxxxx.xxx>
> Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
> Message-ID: <4141F900-265D-4987-B3BE-59B3834BE01B@xxxxxxxxx.xxx>
> Content-Type: text/plain;???
> charset=us-ascii
>
> I can hear very faint CW from them.?
>
> I'm surprised as I have just a single yagi, and apparently
> their amp isn't working.
>
> 73 de W4AS
------------------------------
Message: 3
Date: Fri, 16 Apr 2010 19:43:00 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Arecibo
To: amsat-bb@xxxxx.xxx
Message-ID:
<810912633.6794541271446980172.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
Nill copy till the last 10 min barely out of the noise.? The west coast
seemed not to hear very well?? 910/40 el. cp yagi. Hope they get the amp
running.? The video streaming is neat.? Better luck tomorrow.
73 Bob W7LRD
------------------------------
Message: 4
Date: Fri, 16 Apr 2010 15:53:01 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Arecibo heard
To: Bill Dzurilla <billdz.geo@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<m2m5d8cecfe1004161253w53bc034cwf439883db5acd08a@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I went home for a "lunch break" and was able to copy them on CW (but
not SSB) with the following:
M2 440-18 (an 11' vertical/linear antenna that claims 14.5 dBd)
ARR MSP432VDG-160 preamp (claims 0.55 dB NF)
TS-2000X radio, CW mode, filter width betwen 600Hz and 200Hz
It wasn't arm-chair copy, but after nudging the array around a bit, I
could make out characters and their call. Didn't try to listen to
anybody else (assuming they would quite a bit lower).
The moon was around 67 deg elevation, right in the small "hole" of the
forest canopy growing at my home :)
Anyhow, it was fun, and given their low output, will be fun to listen
tomorrow with a repaired amp!
73,
Mark N8MH
On Fri, Apr 16, 2010 at 3:27 PM, Bill Dzurilla <billdz.geo@xxxxx.xxx> wrote:
> I'm at work and not QRV, but I had no problem copying them with a single
12 el. yagi leaned again the chair when they did the test a couple of weeks
ago, and most everyone else gave them good reports. ?At the time, they were
running 50w, a barefoot Kenwood TS-2000. ?They must have changed rigs if now
they only have 20w. ?And something else must be wrong, because even folks
with big antennas are having trouble copying them (more so than the 50w vs.
20w would suggest).
>
> There's a live feed at http://www.ustream.tv/channel/kp4ao-eme
>
> Good luck and 73,
> Bill NZ5N
>
>> From: Sebastian <w4as@xxxxxxxxx.xxx>
>> Subject: [amsat-bb] Re: Arecibo
>> To: "Mark L.Hammond" <marklhammond@xxxxx.xxx>
>> Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
>> Message-ID: <4141F900-265D-4987-B3BE-59B3834BE01B@xxxxxxxxx.xxx>
>> Content-Type: text/plain;
>> charset=us-ascii
>>
>> I can hear very faint CW from them.
>>
>> I'm surprised as I have just a single yagi, and apparently
>> their amp isn't working.
>>
>> 73 de W4AS
>
>
>
>
>
> _______________________________________________
> 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
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 5
Date: Fri, 16 Apr 2010 12:20:29 -0800
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Arecibo
To: Bill Dzurilla <billdz.geo@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <201004162020.o3GKKTSq031187@xxxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
In march they set up the radios in the antenna structure at the feed;
now probably have some feedline loss since relocating to a more
amenable operating room. I cannot watch the TV stream since
something has turned off my active-X on this computer.
73, Ed - KL7UW
At 11:27 AM 4/16/2010, Bill Dzurilla wrote:
>I'm at work and not QRV, but I had no problem copying them with a
>single 12 el. yagi leaned again the chair when they did the test a
>couple of weeks ago, and most everyone else gave them good
>reports. At the time, they were running 50w, a barefoot Kenwood
>TS-2000. They must have changed rigs if now they only have
>20w. And something else must be wrong, because even folks with big
>antennas are having trouble copying them (more so than the 50w vs.
>20w would suggest).
>
>There's a live feed at http://www.ustream.tv/channel/kp4ao-eme
>
>Good luck and 73,
>Bill NZ5N
>
> > From: Sebastian <w4as@xxxxxxxxx.xxx>
> > Subject: [amsat-bb] Re: Arecibo
> > To: "Mark L.Hammond" <marklhammond@xxxxx.xxx>
> > Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
> > Message-ID: <4141F900-265D-4987-B3BE-59B3834BE01B@xxxxxxxxx.xxx>
> > Content-Type: text/plain;
> > charset=us-ascii
> >
> > I can hear very faint CW from them.
> >
> > I'm surprised as I have just a single yagi, and apparently
> > their amp isn't working.
> >
> > 73 de W4AS
>
>
>
>
>
>_______________________________________________
>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
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
------------------------------
Message: 6
Date: Fri, 16 Apr 2010 20:18:57 -0300
From: ps8rf Piraja <ps8rf@xxxxxxx.xxx>
Subject: [amsat-bb] FW: Re: AO-7 is not OK
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT121-W6B05DB90A475C3F084882E00E0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello Domenico,
I was waiting till a proper orbit of AO-7 for reply to it. Today ( AO-7 .077
orbit ) I kept a QSO with Roland, PY4ZBZ, Joe, K3SZH and Rocco, W2RTV. And I
did not notice any deviation in the uplink or modulation of the AO-7. The
signs were good between 5/5 and 5/7. However I could only hear better,
when the satellite passed over my station. At the end of the orbiter with 1
degree of elevation, when the satellite was heading to North America I
listening Rocco calling " Cq ". I'm more excited. It might have been
problems in one of its solar panels. I have not read anything about the
operation of the same however I seem to be making any changes in the
satellite position justifies the significant improvement in the RX after the
passage of AO-7 on my station. In orbirt "opposite" when the satellite comes
from Europe to South America, I noticed many deviation in uplink frequency.
73'
Piraj?, PS8RF
_________________________________________________________________
O seu navegador tamb?m te ajuda a ficar longe de v?rus. Leia mais sobre
seguran?a.
http://www.microsoft.com/brasil/windows/internet-explorer/?WT.mc_id=1500
------------------------------
Message: 7
Date: Fri, 16 Apr 2010 17:16:14 -0700
From: "D. Craig Fox" <DFox@xxxxxx.xxx>
Subject: [amsat-bb] AGWPE and Window 7 problems
To: "Amsat \(E-mail\)" <amsat-bb@xxxxx.xxx>
Message-ID:
<A8E6E57AFA652D419A823F42AD6ACBDE035940CE@xxxxxxxxx.xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Greetings all. Having only 12 el on 70cm and no az/el, Arecibo is so not
happening at my QTH. But I digress. I recently went to a new Windows 7
(Intel Core I-7 processor) computer from a P4 (what a delight.) Anyway,
SatPC, digipan, MMRTTY, HRD all work fine using my Signalink. What no
longer works, however, is AGWPE and UISS. Unless I set the default speakers
in the computer to the USB codec (Signalink), it simply will not transmit
packet. Decodes fine. This is preventing me from d'ing on NO44 and ISS. I
have posted this problem on some other sites but so far no useful feedback.
If you are running Signalink, AGWPE and Windows 7, can we talk offline?
Thanks in advance.
73s
Craig
N6RSX
NOTICE: This communication may contain privileged or other confidential
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------------------------------
Message: 8
Date: Fri, 16 Apr 2010 12:18:43 -0400
From: "Jacob Tennant" <k8jwt@xxxxxxx.xxx>
Subject: [amsat-bb] Radios for satellite operations
To: <amsat-bb@xxxxx.xxx>
Message-ID: <003801cadd80$7c2592b0$7470b810$@xxx>
Content-Type: text/plain; charset="us-ascii"
Was wondering today after searching around on the internet, what radios are
people using for satellite operations as I noticed the ICOM IC-910H and the
Yaesu FT-847 are now discontinued?
Was hoping to get into the SSB/CW satellites but was hoping to do it on a
new radio, but it seems the satellite radios are disappearing from the
market.
I do have a Yaesu FT-857D that I am getting setup to do the FM satellites
with and will try the SSB/CW satellites if I can do it with that radio.
Jacob Tennant - K8JWT
------------------------------
Message: 9
Date: Fri, 16 Apr 2010 14:44:08 -0400
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] Re: Arecibo
To: amsat-bb@xxxxx.xxx
Message-ID: <4BC877B8.14945.129DEF1@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
On a 24elem linear yagi+preamp signal here is very very weak could be one or
two dits from them. Just hope they can get their linear back i
will try JT65B
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 10
Date: Fri, 16 Apr 2010 15:55:56 -0400
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] Re: Arecibo
To: amsat-bb@xxxxx.xxx
Message-ID: <4BC8888C.24972.16B9A36@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1
On 16 Apr 2010 at 19:43, Bob- W7LRD wrote:
Date sent: Fri, 16 Apr 2010 19:43:00 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Arecibo
To: amsat-bb@xxxxx.xxx
>
> Nill copy till the last 10 min barely out of the noise.? The west coast
seemed not to hear very well?? 910/40 el. cp yagi. Hope they get the amp
running.? The video streaming is neat.? Better luck tomorrow.
> 73 Bob W7LRD
> _______________________________________________
Hi Bob
Someone in Texas was able to copy them with an 11 element yagi but reception
pattern seems to not be equal tend to favor less northern
latitude compare to those at the equator as per i saw on the video stream.
My first JT65B experience intrigue me a bit i got some call signs in my
monitoring screen F5BUU KU7Z K3AX IQ2CJ I'm not able to TX yet
but it will be my next step
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 11
Date: Fri, 16 Apr 2010 21:25:45 -0400
From: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Radios for satellite operations
To: amsat-bb@xxxxx.xxx
Message-ID: <4BC90E19.5020705@xxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The Kenwood TS-2000 and 2000X are still out there. They have an annoying
birdie right smack dab on the downlink of SO-50 and AO-27 but both of
those are FM sats. You can work around the birdie with a preamp but the
pass time is shortened a bit because you are waiting for the receive
frequency to get a little bit away from the birdie so you can hear. I
don't know of any issues with SSB/CW sats though.
Icom is coming out with a new radio that has HF plus sat capapbility
but for the price I've heard you could just about buy a Flex 5000A and
add the soon upcoming V/U module for not much more.
The Flex 5000A is cutting edge technology but you have to get over
most hams confounded affinity for knobs. I just got my 5000A today. I
chose it over replacing the TS-2000X I used to have with another. It
will be awhile before I can afford to add the V/U module but I'm willing
to wait because IMHO the Flex is head and shoulders above any other
radio on the market today.
73,
Michael, W4HIJ
On 4/16/2010 12:18 PM, Jacob Tennant wrote:
> Was wondering today after searching around on the internet, what radios are
> people using for satellite operations as I noticed the ICOM IC-910H and the
> Yaesu FT-847 are now discontinued?
>
>
>
> Was hoping to get into the SSB/CW satellites but was hoping to do it on a
> new radio, but it seems the satellite radios are disappearing from the
> market.
>
>
>
> I do have a Yaesu FT-857D that I am getting setup to do the FM satellites
> with and will try the SSB/CW satellites if I can do it with that radio.
>
>
>
> Jacob Tennant - K8JWT
>
>
------------------------------
Message: 12
Date: Fri, 16 Apr 2010 20:37:19 -0500
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Arecibo
To: "Luc Leblanc" <lucleblanc6@xxxxxxxxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <B6F823A4791649C9B99ECC3B89D4B5E2@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Luc and All,
I was able to copy the CW signal "fair" at times (when my local pulse noise
was down) today around 1840 utc with just a Cushcraft 432-20T
(my 1970's antenna) using a SSB 7000 and a TS-2000x with both preamps on. I
was talking to a local EME operator on 220mhz (WD4JHD)
and would tell him when I heard the signal. He would confirm my reception
each time. I will say it was not good enough to work a contact.
I was just amazed that I could hear them at all with my "flea" antenna.
It's only 4 ft long and was running axial feed to both driven elements. I
was elevated between 67 to 70 plus degrees at the time. I never could hear
the other station, but did hear KP4AO give someone a 559 report.
I hope they run digital mode Sunday to see if I can decode it.
73 all,
Rick WA4NVM
>
> On a 24elem linear yagi+preamp signal here is very very weak could be one
> or two dits from them. Just hope they can get their linear back i
> will try JT65B
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> DSTAR urcall VE2DWE
> WAC BASIC CW PHONE SATELLITE
>
>
> _______________________________________________
> 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: Fri, 16 Apr 2010 21:09:48 -0500
From: "Gary \"Joe\" Mayfield" <gary_mayfield@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Radios for satellite operations
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL114-DS154CB04E4546A412581D5D8A0D0@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Again if price is no object, you should be able to do it with a K3 from
Elecraft (using the sub receive and their transverters).
73,
Joe kk0sd
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Michael Tondee
Sent: Friday, April 16, 2010 8:26 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Radios for satellite operations
The Kenwood TS-2000 and 2000X are still out there. They have an annoying
birdie right smack dab on the downlink of SO-50 and AO-27 but both of
those are FM sats. You can work around the birdie with a preamp but the
pass time is shortened a bit because you are waiting for the receive
frequency to get a little bit away from the birdie so you can hear. I
don't know of any issues with SSB/CW sats though.
Icom is coming out with a new radio that has HF plus sat capapbility
but for the price I've heard you could just about buy a Flex 5000A and
add the soon upcoming V/U module for not much more.
The Flex 5000A is cutting edge technology but you have to get over
most hams confounded affinity for knobs. I just got my 5000A today. I
chose it over replacing the TS-2000X I used to have with another. It
will be awhile before I can afford to add the V/U module but I'm willing
to wait because IMHO the Flex is head and shoulders above any other
radio on the market today.
73,
Michael, W4HIJ
On 4/16/2010 12:18 PM, Jacob Tennant wrote:
> Was wondering today after searching around on the internet, what radios
are
> people using for satellite operations as I noticed the ICOM IC-910H and
the
> Yaesu FT-847 are now discontinued?
>
>
>
> Was hoping to get into the SSB/CW satellites but was hoping to do it on a
> new radio, but it seems the satellite radios are disappearing from the
> market.
>
>
>
> I do have a Yaesu FT-857D that I am getting setup to do the FM satellites
> with and will try the SSB/CW satellites if I can do it with that radio.
>
>
>
> Jacob Tennant - K8JWT
>
>
_______________________________________________
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: 14
Date: Sat, 17 Apr 2010 04:37:19 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Arecibo and circular polarization using cheap
yagis
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, "Douglas Quagliana"
<dquagliana@xxx.xxx>, "amsat" <amsat-bb@xxxxx.xxx>, "Edward Cole"
<kl7uw@xxxxxxxxx.xxx>
Message-ID: <000001caddd7$2e227e00$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Edward Cole" <kl7uw@xxxxxxxxx.xxx>
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>; "i8cvs" <domenico.i8cvs@xxx.xx>;
"Douglas Quagliana" <dquagliana@xxx.xxx>; "amsat" <amsat-bb@xxxxx.xxx>
Sent: Friday, April 16, 2010 8:20 PM
Subject: Re: [amsat-bb] Re: Arecibo and circular polarization using cheap
yagis
My M2 436CP42 looks just like Dom's drawing but
it has a 1/2 wavelength longer phasing line
between the rear and front driven elements. They
say this is the setup for RHCP? It would seem
the M2 system would have the front antenna
180-degrees out of phase? So would that not
produce LHCP? It is actually easier to visualize
with both elements at the same point on the boom
and one fed with a 1/4 wave longer feed line.
73, Ed - KL7UW, WD2XSH/45
Hi Ed, KL7UW
What the M2 say is correct.
In a crossed yagi with vertical and horizontal elements spaced 1/4
wavelenght ( 90?) over the boom if you look from the rear of the
antenna toward the direction of radiation the phase relations are as
follows:
Assume that the power is splitted in two equal parts and the horizontal
and vertical dipoles are feed in phase with equal lenghts of coax cable.
The inner conductor (+) of one coax cable is connected to the right side
of the horizontal rear dipole.
The inner conductor (+) of the other coax cable is connected to the upper
side of the front vertical dipole.
With the above coax cable connections and +90? of phase shift over the
boom the antenna radiates RHCP
If you now add a 1/2 electrical wavelenght (180?) to the coax cable
supplying the front dipole then the polarization reverses in LHCP because
90? of mechanical shift over the boom minus 180? for the 1/2 wavelength
of coax cable make a difference of - 90?
This is exactly what your M2 436CP42 does when switching between
RHCP to LHCP
I agree with you that it is actually easier to visualize with both elements
at the same point on the boom and one fed with a 1/4 wave longer feed
line.
73" de
i8CVS Domenico
------------------------------
Message: 15
Date: Fri, 16 Apr 2010 21:51:05 -0500
From: Idle-Tyme <nss@xxx.xxx>
Subject: [amsat-bb] Re: Arecibo and circular polarization using cheap
yagis
To: amsat-bb@xxxxx.xxx
Message-ID: <4BC92219.20309@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
But what about antennas like the M2 ants where it's a balanced feed, and
there is no + side of the element or coax?
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 4/16/2010 9:37 PM, i8cvs wrote:
> ----- Original Message -----
> From: "Edward Cole"<kl7uw@xxxxxxxxx.xxx>
> To: "Rick - WA4NVM"<wa4nvm@xxxxxxx.xxx>; "i8cvs"<domenico.i8cvs@xxx.xx>;
> "Douglas Quagliana"<dquagliana@xxx.xxx>; "amsat"<amsat-bb@xxxxx.xxx>
> Sent: Friday, April 16, 2010 8:20 PM
> Subject: Re: [amsat-bb] Re: Arecibo and circular polarization using cheap
> yagis
>
> My M2 436CP42 looks just like Dom's drawing but
> it has a 1/2 wavelength longer phasing line
> between the rear and front driven elements. They
> say this is the setup for RHCP? It would seem
> the M2 system would have the front antenna
> 180-degrees out of phase? So would that not
> produce LHCP? It is actually easier to visualize
> with both elements at the same point on the boom
> and one fed with a 1/4 wave longer feed line.
>
> 73, Ed - KL7UW, WD2XSH/45
>
>
> Hi Ed, KL7UW
>
> What the M2 say is correct.
>
> In a crossed yagi with vertical and horizontal elements spaced 1/4
> wavelenght ( 90?) over the boom if you look from the rear of the
> antenna toward the direction of radiation the phase relations are as
> follows:
>
> Assume that the power is splitted in two equal parts and the horizontal
> and vertical dipoles are feed in phase with equal lenghts of coax cable.
>
> The inner conductor (+) of one coax cable is connected to the right side
> of the horizontal rear dipole.
> The inner conductor (+) of the other coax cable is connected to the upper
> side of the front vertical dipole.
>
> With the above coax cable connections and +90? of phase shift over the
> boom the antenna radiates RHCP
>
> If you now add a 1/2 electrical wavelenght (180?) to the coax cable
> supplying the front dipole then the polarization reverses in LHCP because
> 90? of mechanical shift over the boom minus 180? for the 1/2 wavelength
> of coax cable make a difference of - 90?
>
> This is exactly what your M2 436CP42 does when switching between
> RHCP to LHCP
>
> I agree with you that it is actually easier to visualize with both elements
> at the same point on the boom and one fed with a 1/4 wave longer feed
> line.
>
> 73" de
>
> i8CVS Domenico
>
>
>
>
>
>
>
> _______________________________________________
> 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: 16
Date: Sat, 17 Apr 2010 04:52:53 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Arecibo
To: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>, "Luc Leblanc"
<lucleblanc6@xxxxxxxxx.xx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <000001caddd9$57610be0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
To: "Luc Leblanc" <lucleblanc6@xxxxxxxxx.xx>; <amsat-bb@xxxxx.xxx>
Sent: Saturday, April 17, 2010 3:37 AM
Subject: [amsat-bb] Re: Arecibo
>
> Luc and All,
>
> I was able to copy the CW signal "fair" at times (when my local pulse
> noise was down) today around 1840 utc with just a Cushcraft 432-20T
>
> 73 all,
> Rick WA4NVM
>
Hi Rick, WA4NVM
As far I remember the 432-20T should be a 10 + 10 elements crossed yagi.
Do you remember if your antenna is connected for RHCP or LHCP ?
Since Arecibo transmit a RHCP toward the moon and the moon reflects
back a LHCP wave if you was able to copy the CW signal then your antenna
should be LHCP.
Please let us know if possible.
Tanks
73" de
i8CVS Domenico
------------------------------
Message: 17
Date: Fri, 16 Apr 2010 23:14:56 -0400
From: "Bill Bordy, NJ1H " <nj1h@xxxxxxx.xxx>
Subject: [amsat-bb] LVB Tracker USB serial port driver for Windows 7
x64?
To: AMSAT-BB@xxxxx.xxx
Message-ID: <4BC927B0.9080204@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Has anyone located a driver for the LVB Tracker internal USB to serial
port adapter on Windows 7 x64?
If not, has anyone reverted to the serial port connection on LVB Tracker
and used an external USB to serial port adapter successfully with
SatPC32 on Windows 7 x64?
I have an Edgeport multiple USB to serial port that has drivers for
Windows 7 x64 that I will use if I have to. I would prefer using the LVB
Tracker with its USB to serial adapter if someone has another solution.
73,
Bill
NJ1H
------------------------------
Message: 18
Date: Fri, 16 Apr 2010 20:18:24 -0700 (PDT)
From: John Neeley <w6zkh@xxx.xxx>
Subject: [amsat-bb] Re: Radios for satellite operations
To: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <22440.48266.qm@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Saw all the Flex goodies at the DX Convention here in Visalia today. Dunno,
I still like to twist knobs, but it is quite a system they have...
John W6ZKH
________________________________
From: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Fri, April 16, 2010 6:25:45 PM
Subject: [amsat-bb] Re: Radios for satellite operations
The Kenwood TS-2000 and 2000X are still out there. They have an annoying
birdie right smack dab on the downlink of SO-50 and AO-27 but both of
those are FM sats. You can work around the birdie with a preamp but the
pass time is shortened a bit because you are waiting for the receive
frequency to get a little bit away from the birdie so you can hear. I
don't know of any issues with SSB/CW sats though.
Icom is coming out with a new radio that has HF plus sat capapbility
but for the price I've heard you could just about buy a Flex 5000A and
add the soon upcoming V/U module for not much more.
The Flex 5000A is cutting edge technology but you have to get over
most hams confounded affinity for knobs. I just got my 5000A today. I
chose it over replacing the TS-2000X I used to have with another. It
will be awhile before I can afford to add the V/U module but I'm willing
to wait because IMHO the Flex is head and shoulders above any other
radio on the market today.
73,
Michael, W4HIJ
On 4/16/2010 12:18 PM, Jacob Tennant wrote:
> Was wondering today after searching around on the internet, what radios are
> people using for satellite operations as I noticed the ICOM IC-910H and the
> Yaesu FT-847 are now discontinued?
>
>
>
> Was hoping to get into the SSB/CW satellites but was hoping to do it on a
> new radio, but it seems the satellite radios are disappearing from the
> market.
>
>
>
> I do have a Yaesu FT-857D that I am getting setup to do the FM satellites
> with and will try the SSB/CW satellites if I can do it with that radio.
>
>
>
> Jacob Tennant - K8JWT
>
>
_______________________________________________
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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 5, Issue 172
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