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CX2SA > SATDIG 16.12.15 20:13l 946 Lines 34025 Bytes #999 (0) @ WW
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Sent: 151216/1803Z @:CX2SA.SAL.URY.SOAM #:35609 [Salto] FBB7.00e $:AMSATBB10385
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Improve Orbital-decay predictions (Luc Leblanc)
2. Special Membership Offer for Fox-1A launch expiring December
31, 2015 (Andrew Glasbrenner)
3. Re: Special Membership Offer for Fox-1A launch expiring
December 31, 2015 (J. Boyd (JR2TTS))
4. Re: Help needed please (Aayush Yadav)
5. Telemetry Signals Heard from from Athenoxat-1
(Mani [VU2WMY/KJ6LRS])
6. Re: [amsatindia] Telemetry Signals Heard from from
Athenoxat-1 (Nitin Muttin)
7. Elk Antenna, Midland CT 890 and Full Duplex (Felix Paez)
8. Re: Elk Antenna, Midland CT 890 and Full Duplex
(Patrick STODDARD (WD9EWK/VA7EWK))
9. Re: Elk Antenna, Midland CT 890 and Full Duplex (Dani EA4GPZ)
10. SatPC32c Problem.......... (Carmen Peca)
11. Re: AO-7 (Gustavo Nicolau)
12. Re: SatPC32c Problem.......... (Burns Fisher)
----------------------------------------------------------------------
Message: 1
Date: Tue, 15 Dec 2015 16:32:55 -0500
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Improve Orbital-decay predictions
Message-ID: <56708707.13240.1374D6A@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; CHARSET=US-ASCII
http://www.nasa.gov/press-release/goddard/plunging-into-the-ionosphere-satelli
te-s-last-days-i
mprove-orbital-decay-predictions
Luc Leblanc VE2DWE
------------------------------
Message: 2
Date: Tue, 15 Dec 2015 22:16:06 -0500
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
To: "'Andrew Glasbrenner'" <glasbrenner@xxxxxxxxxx.xxx>, "'amsat-bb'"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Special Membership Offer for Fox-1A launch
expiring December 31, 2015
Message-ID: <0cdd01d137b0$1a4fbc60$4eef3520$@xxx>
Content-Type: text/plain; charset="UTF-8"
We've welcomed dozens of new members since the AO-85 launch with our offer
of ?Getting Started With The Amateur Satellites? as a free PDF with
membership in AMSAT, but this offer will come to an end on December 31st,
2015. Point your browser to
http://store.amsat.org/catalog/index.php?cPath=32 and help AMSAT keep
amateur radio in space, and get a free e-book as a thank you.
73, Drew KO4MA
AMSAT-VP Operations
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Andrew
Glasbrenner
Sent: Thursday, October 01, 2015 2:44 PM
To: amsat-bb
Subject: [amsat-bb] Special Membership Offer for Fox-1A launch on October 8,
2015
>From http://www.amsat.org/?p=4591
AMSAT?s Fox-1A is set to launch as part of the GRACE (Government Rideshare
Advanced Concepts Experiment) auxillary payload on the NROL-55 mission
October 8, 2015 from Vandenburg AFB on an Atlas V vehicle. More details will
be released when made available from our launch provider. NRO has released
this factsheet about the mission:
http://www.amsat.org/wordpress/wp-content/uploads/2015/10/GRACE_CubeSat_FactSh
eet.pdf
General information on Fox-1A is available in the downloadable AMSAT Fox
Operating Guide
http://www.amsat.org/wordpress/wp-content/uploads/2015/05/FoxOperatingGuide_Ma
y2015_Hi.pdf
FoxTelem software for decoding and submitting telemetry has been made
available for download at http://www.amsat.org/?page_id=4532 .
As part of the preparations for the launch and activation of this new
satellite, AMSAT is making our ?Getting Started With The Amateur Satellites?
book available for a limited time as a download with any paid new or renewal
membership purchased via the AMSAT Store. This offer is only available with
purchases completed online, and for only a limited time. A perennial
favorite, Getting Started is updated every year with the latest amateur
satellite information, and is the premier primer of satellite operation. The
132 page book is presented in PDF format, in full color, and covers all
aspects of making your first contacts on a ham radio satellite.
Please take advantage of this offer today by visiting the AMSAT store
(http://store.amsat.org/catalog/) and selecting any membership option. While
there, check out our other items, including the M2 LEOpack antenna system,
AMSAT shirts, hats, and other swag. Thank you, and see you soon on Fox-1A!
73, Drew KO4MA
AMSAT VP Operations
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Wed, 16 Dec 2015 12:30:33 +0900
From: "J. Boyd (JR2TTS)" <the2belo@xxx.xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Special Membership Offer for Fox-1A launch
expiring December 31, 2015
Message-ID: <20151216122808.BC89.THE2BELO@xxx.xxxxxxx.xx.xx>
Content-Type: text/plain; charset="UTF-8"
On Tue, 15 Dec 2015 22:16:06 -0500, "Andrew Glasbrenner"
<glasbrenner@xxxxxxxxxx.xxx> wrote:
> We've welcomed dozens of new members since the AO-85 launch with our
> offer of ?Getting Started With The Amateur Satellites? as a free PDF
> with membership in AMSAT, but this offer will come to an end on December
> 31st, 2015. Point your browser to
> http://store.amsat.org/catalog/index.php?cPath=32 and help AMSAT keep
> amateur radio in space, and get a free e-book as a thank you.
And I am one of them! Became a member last weekend. Thanks to all in
AMSAT and on this board for the helpful information that comes in every
day.
Now then, can I obtain my SATPC32 password now? It's been four days... :)
--
J. Boyd, JR2TTS/NI3B
the2belo@xxx.xxxxxxx.xx.xx
http://www.flickr.com/photos/the2belo/
http://www.qrz.com/db/JR2TTS
Twitter: @xxxxxxxx
------------------------------
Message: 4
Date: Wed, 16 Dec 2015 16:55:37 +0530
From: Aayush Yadav <aayushyadav825@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] Help needed please
Message-ID:
<CALRS4DzNr7eMdjMpTE=UgFhNnNfTCRqdSkvCSCWVKzwvxYuQsA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello all,
Currently we are planning to transmit 1 Watt signal from the satellite but
due to vswr losses, the transmitted power is around 100 mW. This is due to
the antenna's S11 loss being around -1 rather than -10. This is for the VHF
band for which we are using an antenna 17 cm long, thus such high loss. The
length can not be increased much and so is the case with the
electronics(power amplifier) as we are restricted by other constraints.
We would love to hear some of your suggestions so as to how can we still
increase the transmission power meeting all these requirements. And if not,
what can be done on the Ground-Station to improve the reception. Are there
satellites available which transmit such low power and still can be
received?
Any Help would be appreciated.
Thanking you,
Aayush Yadav
Team Pratham.
On Mon, Dec 7, 2015 at 9:01 AM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
> Hi Aayush,
>
> As discussed please consider the below points.
>
> 1. Fine tune your antennas in the satellite sub band on VHF and UHF. VHF -
> 145.800Mhz - 146.000 Mhz. UHF 435-438 Mhz.
>
> 2. Replace the RG -58 Cable with Heliax or LMR 400 Cable.
>
> 3. Move the pre amp (LNA) to the mast closer to the antenna.
>
> 4. Refer http://www.dk3wn.info/satellites.shtml for the list of
> satellites , modes and frequencies.
>
> 5. For some satellites you can use sound card based software TNC like
> http://uz7.ho.ua/packetradio.htm for AX25.
>
> 73
> Nitin [VU3TYG]
>
> ------------------------------
> *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> *Cc:* Mani VU2 WMY <wmy@xxxx.xxx.xx>; Somashekar S. <vu3jba@xxxxx.xxx>
> *Sent:* Saturday, 5 December 2015 2:27 PM
> *Subject:* Re: Help needed please
>
> Hello sir,
> As discussed over the phone, could you please provide me with the various
> satellites to track, information regarding softwares and the cables.
> Thank you sir,
>
> Yours sincerely,
> Aayush
> Team pratham
>
>
>
> On Tue, Dec 1, 2015 at 6:28 PM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
>
> Hi Aayush,
>
> Sure, we can discuss on Saturday after 11AM. I can be reached on
> 9880018675.
>
> 73
> Nitin [VU3TYG]
>
> ------------------------------
> *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> *Cc:* Mani VU2 WMY <wmy@xxxx.xxx.xx>; Somashekar S. <vu3jba@xxxxx.xxx>
> *Sent:* Tuesday, 1 December 2015 3:40 PM
>
> *Subject:* Re: [amsat-bb] Help needed please
>
> Hi Nitin,
> I was wondering if you were free this week, we would really appreciate the
> help.
>
> Thanking you,
>
> Regards,
> Aayush Yadav
> Team Pratham.
>
>
>
> On Tue, Nov 24, 2015 at 9:10 PM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
>
> Sure Aayush we can discuss this next week over a phone call. This week we
> have a tight schedule to the HAMFEST 2015 in Rajkot.
>
> 73
> Nitin [VU3TYG]
> Secretary, AMSAT INDIA
> www.amsatindia.org
>
> ------------------------------
> *From:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> *To:* Nitin Muttin <vu3tyg@xxxxx.xx.xx>
> *Sent:* Tuesday, 24 November 2015 7:37 PM
>
> *Subject:* Re: [amsat-bb] Help needed please
>
> Hello Nitin,
>
> We would love to have your help on the same. If you have any advice on how
> we should continue our work we really welcome the suggestions. Thanks a lot
> for your reply.
> If you could help us in improving our sensitivity, as currently we get
> around -110 dbm noise at the antenna but as per our calculations the power
> of the signal we need to recieve would be of an order of -150 dbm.
>
> 73
> Aayush Yadav.
> Team Pratham.
>
>
>
> On Tue, Nov 24, 2015 at 11:40 AM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
>
> Thanks Burns for the pointers.
>
> @xxxxxxx I can help you with information so that you are able to
> successfully receive and decode telemetry.
>
> 73
> Nitin [VU3TYG]
>
> ------------------------------
> *From:* Burns Fisher <burns@xxxxxx.xx>
> *To:* Aayush Yadav <aayushyadav825@xxxxx.xxx>
> *Cc:* "amsat-bb@xxxxx.xxxx <AMSAT-BB@xxxxx.xxx>
> *Sent:* Tuesday, 24 November 2015 1:28 AM
> *Subject:* Re: [amsat-bb] Help needed please
>
> Hello Aayush,
>
> Starting out with very strong signals is probably a good idea even though
> you can probably get any satellite
> that you wish with a good ground station. Start out with AO-85 for FM
> reception and AO-73 for SSB
> reception. AO-73 is especially strong during local day time during
> Mon-Friday (UTC). There is not
> transponder turned on then, so all the power goes into the telemetry.
>
> Both of these can be received with an HT (handheld with a simple antenna)
> so you are very likely to receive
> them on any station you have and optimize from there.
>
> I would also suggest that you might find local colleagues in AMSAT-India
> who would be able to tell you
> things of local interest (what parts are available where, for example).
>
> 73,
>
> Burns W2BFJ
>
> On Mon, Nov 23, 2015 at 2:16 PM, Aayush Yadav <aayushyadav825@xxxxx.xxx>
> wrote:
>
> > Hello all,
> >
> > As a part of a student satellite project from India, I have a few
> questions
> > regarding how can i improve my reception of data on the ground station.
> We
> > have a TS2000 and have designed a few yagi antennas for uhf and vhf
> band. I
> > would like to know some satellites on which we can practice receiving any
> > signal. We are totally new to this system and have practiced some failed
> > attempts of the same. Further, we would really appreciate If anyone could
> > help on how we can increase our reception power. Any other help or advice
> > would also be appreciated. Thank you.
> >
> > Aayush Yadav,
> > Team Pratham,
> > IIT Bombay.
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
> >
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
>
>
>
>
>
>
>
>
>
------------------------------
Message: 5
Date: Wed, 16 Dec 2015 19:54:25 +0530
From: "Mani [VU2WMY/KJ6LRS]" <wmy@xxxx.xxx.xx>
To: "BB, AMSAT" <amsat-bb@xxxxx.xxx>, amsatindia@xxxxxxxxxxx.xxxx
VUHAMS <vuhams@xxxxxxxxxxx.xxx>, isrohams@xxxxxxxxxxx.xxx
Cc: giulio.manzoni@xxxxxxxxxxx.xxx
Subject: [amsat-bb] Telemetry Signals Heard from from Athenoxat-1
Message-ID: <20151216141858.1A88685EB@xxxxxxxxxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed; DelSp=Yes
Hello All,
Heard strong CW telemetry signals from just launched Athenoxat-1on 437.485
Mhz at 14:09 UTC during its first 22 degrees southern pass over Bangalore,
India.
But, couldn't decode as it was too fast.
Good wishes and greetings from all of us here in India for an early and
successful commissioning of all the six satellites from Singapore.
73 de
Mani [VU2WMY/KJ6LRS]
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre
HAL Airport Road, Bangalore-560 017.
Phone:(Office)91-80-25082598/25082054/25082192
Mobile:? 91-9880 341 456
E-mail ID: wmy@xxxx.xxx.xx
? ? ? ? ? ?vu2wmy_mani@xxxxx.xxx
? ? ? ? ? ?isrohams@xxxxx.xxx
------------------------------------------------------------------------------
Confidentiality Notice: This e-mail message, including any attachments, is for
the sole use of the intended recipient(s) and may contain confidential and
privileged information. Any unauthorized review, use, disclosure or
distribution is prohibited. If you are not the intended recipient, please
contact the sender by reply e-mail and destroy all copies of the original
message.
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------------------------------
Message: 6
Date: Wed, 16 Dec 2015 14:35:38 +0000 (UTC)
From: Nitin Muttin <vu3tyg@xxxxx.xx.xx>
To: "amsatindia@xxxxxxxxxxx.xxxx <amsatindia@xxxxxxxxxxx.xxx>, "BB,
AMSAT" <amsat-bb@xxxxx.xxx>, VUHAMS <vuhams@xxxxxxxxxxx.xxx>,
"isrohams@xxxxxxxxxxx.xxxx <isrohams@xxxxxxxxxxx.xxx>
Cc: "giulio.manzoni@xxxxxxxxxxx.xxxx <giulio.manzoni@xxxxxxxxxxx.xxx>
Subject: Re: [amsat-bb] [amsatindia] Telemetry Signals Heard from from
Athenoxat-1
Message-ID:
<1463093728.2023426.1450276538901.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Congrats Mani, I could not hear any signals will try next pass?73
Nitin [VU3TYG]
From: "'Mani [VU2WMY/KJ6LRS]' wmy@xxxx.xxx.xx [amsatindia]"
<amsatindia@xxxxxxxxxxx.xxx>
To: "BB, AMSAT" <amsat-bb@xxxxx.xxx>; amsatindia@xxxxxxxxxxx.xxxx VUHAMS
<vuhams@xxxxxxxxxxx.xxx>; isrohams@xxxxxxxxxxx.xxx
Cc: giulio.manzoni@xxxxxxxxxxx.xxx
Sent: Wednesday, 16 December 2015 7:54 PM
Subject: [amsatindia] Telemetry Signals Heard from from Athenoxat-1
? Hello All,
Heard strong CW telemetry signals from just launched Athenoxat-1on 437.485
Mhz at 14:09 UTC during its first 22 degrees southern pass over Bangalore,
India.
But, couldn't decode as it was too fast.
Good wishes and greetings from all of us here in India for an early and
successful commissioning of all the six satellites from Singapore.
73 deMani [VU2WMY/KJ6LRS]
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre
HAL Airport Road, Bangalore-560 017.
Phone:(Office)91-80-25082598/25082054/25082192
Mobile:? 91-9880 341 456
E-mail ID: wmy@xxxx.xxx.xx
? ? ? ? ? ?vu2wmy_mani@xxxxx.xxx
? ? ? ? ? ?isrohams@xxxxx.xxx
Confidentiality Notice: This e-mail message, including any attachments, is
for the sole use of the intended recipient(s) and may contain confidential
and privileged information. Any unauthorized review, use, disclosure or
distribution is prohibited. If you are not the intended recipient, please
contact the sender by reply e-mail and destroy all copies of the original
message.
__._,_.___ Posted by: "Mani [VU2WMY/KJ6LRS]" <wmy@xxxx.xxx.xx>
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Message: 7
Date: Wed, 16 Dec 2015 17:59:36 +0100
From: Felix Paez <ea4gqs@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
Message-ID:
<CAGfY+e0JsnHWGn62Tvsac2kRSAX0zb0n9cuF6Lt33PgvBqmRFQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi all,
First of all, thanks for your patience. Still learning!
Well, until few days ago I have been able to do many contacts throught
SO-50 using my Baofeng UV-5R and Elk antenna in half duplex.
I wanted to go next step and try Full Duplex so I bought a Midland CT 890
Full Duplex handy (129 eur).
I can tell that the Midland receiver seems much better than the Baofeng
one. I have been able to work (still half duplex) even when the satellite
was a few degrees over the horizon. The Baofeng seems much deaf than the
Midland, but this my subjective experience. The measured sensitivities I
got from a review are: 0.179 uV (12 dB SINAD) in VHF and 0.205 uv (12 dB
SINAD) in UHF but I don?t have the Baofeng values. If somebody has them It
would be nice if you share so we can compare.
I have checked that the Full Duplex mode works by transmiting with it and
at the same time receiving a signal from the Baofeng UV-5R but all this
using the whip antenna that comes with the Midland.
The problem comes when I connect the Elk antenna to it. If I press the PTT
the receiver noise goes to maximum. I tried to make a contact with the
SO-50 but I could not hear anything when I pressed the PTT. All was noise.
I had to disable the Full Duplex and then I was able to make some nice
contacts (EA1JM, CU2ZG?) in half duplex.
So my questions are?
1. Is it possible to use a single Log Periodic antenna (only one feed
point) as the Elk to work Full Duplex or two antennas are needed?
2. In case that it is possible? Would this improve by using separate
receiver and transmitter with a filter that gives a feed point for VHF and
another one for UHF? (the Elk antenna only has a feed point)
I have to make more tests but at first time, It does not seem possible to
use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
antenna in Full Duplex?
Thanks. Any comments are always welcome
Felix EA4GQS
------------------------------
Message: 8
Date: Wed, 16 Dec 2015 10:19:38 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
Message-ID:
<CAN6TEUfDxADq1yoHw3AEGaD+2FA5SQkQksya8XYmtz_6n0cn+Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hola, Felix!
Your Midland CT-890 is very similar to the Wouxun KG-UV8D HT,
which has been on sale in much of the world for the past year
and a half. I have not seen the CT-890 here, but I'll offer
some answers to your questions based on the thought that these
radios are very similar, if not the same, but sold with different
model numbers...
1. Yes, you can use a log periodic antenna to work satellites
full-duplex using your CT-890, but not SO-50. The HT's 70cm
receiver is desensed when you transmit on 2m, and this happens
when using other antennas as well. You may be able to work
the new AO-85 satellite full-duplex with this HT, as you
would transmit to AO-85 on 70cm instead of 2m, and avoid
the internal desense issues you experienced when transmitting
to SO-50 on 2m. This is a common issue with a few of the
Chinese-made dual-band HTs that are advertised as having
full-duplex capabilities.
2. A separate receiver and transmitter for SO-50 should let
you work SO-50 full-duplex. You could use the Baofeng HT as
your transmit radio, and use the better receiver in your
CT-890 to hear the satellite downlink. This should also work
for LilacSat-2 (2m uplink, 70cm downlink) and AO-85 - but
you may be able to work AO-85 full-duplex with just your
CT-890.
I had written about my experiences using my KG-UV8D to work
AO-85 full-duplex in a couple of posts to this list in
October and November:
http://amsat.org/pipermail/amsat-bb/2015-October/055462.html
http://amsat.org/pipermail/amsat-bb/2015-November/056254.html
You can also read about my tests with a few other HTs with
AO-85 from another AMSAT-BB post I made early this month:
http://amsat.org/pipermail/amsat-bb/2015-December/056269.html
You may find these posts useful, as you work with your new
CT-890.
Buena suerte, y 73!!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @xxxxxx
On Wed, Dec 16, 2015 at 9:59 AM, Felix Paez <ea4gqs@xxxxx.xxx> wrote:
> Hi all,
>
>
>
> First of all, thanks for your patience. Still learning!
>
>
>
> Well, until few days ago I have been able to do many contacts throught
> SO-50 using my Baofeng UV-5R and Elk antenna in half duplex.
>
>
>
> I wanted to go next step and try Full Duplex so I bought a Midland CT 890
> Full Duplex handy (129 eur).
>
?
?<snip>?
> So my questions are?
>
> 1. Is it possible to use a single Log Periodic antenna (only one feed
> point) as the Elk to work Full Duplex or two antennas are needed?
>
> 2. In case that it is possible? Would this improve by using separate
> receiver and transmitter with a filter that gives a feed point for VHF and
> another one for UHF? (the Elk antenna only has a feed point)
>
> I have to make more tests but at first time, It does not seem possible to
> use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
> antenna in Full Duplex?
>
>
>
------------------------------
Message: 9
Date: Wed, 16 Dec 2015 17:21:12 +0000
From: Dani EA4GPZ <daniel@xxxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
Message-ID: <56719D88.3080502@xxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
El 16/12/15 a las 16:59, Felix Paez escribi?:
> The problem comes when I connect the Elk antenna to it. If I press the PTT
> the receiver noise goes to maximum. I tried to make a contact with the
> SO-50 but I could not hear anything when I pressed the PTT. All was noise.
> I had to disable the Full Duplex and then I was able to make some nice
> contacts (EA1JM, CU2ZG?) in half duplex.
Hi Felix,
Probably you are experiencing desensing on the receiver caused by the
transmit signal. This is much worse when working V/U because the 3rd
harmonic of the TX signal lies on the 70cm band. Patrick WD9EWK has made
many tests with different inexpensive Chinese full-duplex radios and it
seems that most of them are fine to work AO-85 (which is U/V) but it's
impossible to work SO-50 with any of them. Perhaps you could have more
luck with AO-85.
>
> So my questions are?
>
> 1. Is it possible to use a single Log Periodic antenna (only one feed
> point) as the Elk to work Full Duplex or two antennas are needed?
Yes. It's technically possible, although, as I said, desense can be an
issue. I think that it's worse with the elk than with, say the arrow
(which is two crossed yagis) because the coupling between the TX and RX
is much greater on the elk than on the arrow.
> 2. In case that it is possible? Would this improve by using separate
> receiver and transmitter with a filter that gives a feed point for VHF and
> another one for UHF? (the Elk antenna only has a feed point)
If you have a 2m/70cm duplexer, you can try using two radios. Perhaps a
cheap Baofeng for TX and the Midland (which is more sensitive) for RX.
This will probably be much better than just using the Midland
full-duplex, because the external duplexer will provide better isolation
than the one on the Midland.
> I have to make more tests but at first time, It does not seem possible to
> use the Midland CT 890 (and maybe other full duplex handys?) with the Elk
> antenna in Full Duplex?
It seems that it's difficult to get a handheld that can do V/U
full-duplex. However, U/V is much easier.
73,
Dani M0HXM/EA4GPZ.
------------------------------
Message: 10
Date: Wed, 16 Dec 2015 12:44:04 -0500
From: "Carmen Peca" <carmenpeca@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SatPC32c Problem..........
Message-ID: <000301d13829$5bb38000$131a8000$@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi All, I was wondering if anyone has had any problem with SatPC32c and CAT
control. I have been running SatPC32b with the 910H and everything worked
perfectly. I upgraded to version "C" and the LVB rotor control works fine
but I cannot get the CAT working. I made sure everything worked Ok with Ham
Radio Deluxe, and it worked flawlessly changed frequencies and mode with no
problems using the same com port. If anyone can point me in the right
direction to correct this, it would be greatly appreciated.
Thanks,73
Carm,WO3T
------------------------------
Message: 11
Date: Wed, 16 Dec 2015 15:46:41 -0200
From: Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-7
Message-ID:
<CAGHu4f9aOUWSJmrND03t0AyEAT5_+6+x6eUCWZ=yKTgiAhBYsA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi all. Today i'm qrv in AO7. 73 de PT9BM. Gustavo Nicolau. GH40
2015-12-12 13:56 GMT-02:00 Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>:
> > Hello to all, gud condictions today via AO7. I'm QRV.
> >
> > 73 de PT9BM.
>
------------------------------
Message: 12
Date: Wed, 16 Dec 2015 13:01:09 -0500
From: Burns Fisher <burns@xxxxxx.xx>
To: Carmen Peca <carmenpeca@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SatPC32c Problem..........
Message-ID:
<CABX7KxU8pcMFGVqPK+fdZE-z+cTn_0dFtqtUxM=4qPtiHr1+xA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Carmen,
I'm having trouble with my TS-2000 as well, but I have not used it for a
while (and have not really tried to debug it very much). However, check
the release notes on SatPC32c. When I was scanning around, I found that it
said to change a couple check boxes for some radios. It did not solve my
TS-2000 problem, but I don't remember if the 910H was also one that
required a change.
73,
Burns W2BFJ
On Wed, Dec 16, 2015 at 12:44 PM, Carmen Peca <carmenpeca@xxxxxxx.xxx>
wrote:
> Hi All, I was wondering if anyone has had any problem with SatPC32c and CAT
> control. I have been running SatPC32b with the 910H and everything worked
> perfectly. I upgraded to version "C" and the LVB rotor control works fine
> but I cannot get the CAT working. I made sure everything worked Ok with Ham
> Radio Deluxe, and it worked flawlessly changed frequencies and mode with no
> problems using the same com port. If anyone can point me in the right
> direction to correct this, it would be greatly appreciated.
>
> Thanks,73
> Carm,WO3T
>
> _______________________________________________
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> expressed
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>
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
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------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 385
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