[amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
Felix Paez
ea4gqs at gmail.com
Thu Dec 17 09:17:54 UTC 2015
Thanks Patrick and Dani,
yeah It seems the classic desensing issue... I did not remember that. When
I made the tests with the whip antenna I think it was U/V... I will try
AO-85 and let you know.
Very interesting the links to your messages about the handy tests Patrick,
Regards,
Felix EA4GQS
2015-12-16 19:01 GMT+01:00 <amsat-bb-request at amsat.org>:
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> 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 at videotron.ca>
> To: amsat-bb at amsat.org
> Subject: [amsat-bb] Improve Orbital-decay predictions
> Message-ID: <56708707.13240.1374D6A at lucleblanc6.videotron.ca>
> Content-Type: text/plain; CHARSET=US-ASCII
>
>
>
>
>
> http://www.nasa.gov/press-release/goddard/plunging-into-the-ionosphere-satellite-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 at mindspring.com>
> To: "'Andrew Glasbrenner'" <glasbrenner at mindspring.com>,
> "'amsat-bb'"
> <amsat-bb at amsat.org>
> Subject: [amsat-bb] Special Membership Offer for Fox-1A launch
> expiring December 31, 2015
> Message-ID: <0cdd01d137b0$1a4fbc60$4eef3520$@com>
> 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 at amsat.org] 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_FactSheet.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_May2015_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 at amsat.org. 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
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> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 16 Dec 2015 12:30:33 +0900
> From: "J. Boyd (JR2TTS)" <the2belo at msd.biglobe.ne.jp>
> To: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Special Membership Offer for Fox-1A launch
> expiring December 31, 2015
> Message-ID: <20151216122808.BC89.THE2BELO at msd.biglobe.ne.jp>
> Content-Type: text/plain; charset="UTF-8"
>
> On Tue, 15 Dec 2015 22:16:06 -0500, "Andrew Glasbrenner" <
> glasbrenner at mindspring.com> 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 at msd.biglobe.ne.jp
> http://www.flickr.com/photos/the2belo/
> http://www.qrz.com/db/JR2TTS
> Twitter: @Minus2_C
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 16 Dec 2015 16:55:37 +0530
> From: Aayush Yadav <aayushyadav825 at gmail.com>
> To: "amsat-bb at amsat.org" <AMSAT-BB at amsat.org>
> Subject: Re: [amsat-bb] Help needed please
> Message-ID:
> <CALRS4DzNr7eMdjMpTE=
> UgFhNnNfTCRqdSkvCSCWVKzwvxYuQsA at mail.gmail.com>
> 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 at yahoo.co.in> 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 at gmail.com>
> > *To:* Nitin Muttin <vu3tyg at yahoo.co.in>
> > *Cc:* Mani VU2 WMY <wmy at isac.gov.in>; Somashekar S. <vu3jba at gmail.com>
> > *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 at yahoo.co.in> wrote:
> >
> > Hi Aayush,
> >
> > Sure, we can discuss on Saturday after 11AM. I can be reached on
> > 9880018675.
> >
> > 73
> > Nitin [VU3TYG]
> >
> > ------------------------------
> > *From:* Aayush Yadav <aayushyadav825 at gmail.com>
> > *To:* Nitin Muttin <vu3tyg at yahoo.co.in>
> > *Cc:* Mani VU2 WMY <wmy at isac.gov.in>; Somashekar S. <vu3jba at gmail.com>
> > *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 at yahoo.co.in>
> 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 at gmail.com>
> > *To:* Nitin Muttin <vu3tyg at yahoo.co.in>
> > *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 at yahoo.co.in>
> wrote:
> >
> > Thanks Burns for the pointers.
> >
> > @Aayush, I can help you with information so that you are able to
> > successfully receive and decode telemetry.
> >
> > 73
> > Nitin [VU3TYG]
> >
> > ------------------------------
> > *From:* Burns Fisher <burns at fisher.cc>
> > *To:* Aayush Yadav <aayushyadav825 at gmail.com>
> > *Cc:* "amsat-bb at amsat.org" <AMSAT-BB at amsat.org>
> > *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 at gmail.com>
> > 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 at amsat.org. 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 at amsat.org. 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 at isac.gov.in>
> To: "BB, AMSAT" <amsat-bb at amsat.org>, amsatindia at yahoogroups.com,
> VUHAMS <vuhams at yahoogroups.com>, isrohams at yahoogroups.com
> Cc: giulio.manzoni at micro-space.org
> Subject: [amsat-bb] Telemetry Signals Heard from from Athenoxat-1
> Message-ID: <20151216141858.1A88685EB at lansing182.amsat.org>
> 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 at isac.gov.in
> ? ? ? ? ? ?vu2wmy_mani at yahoo.com
> ? ? ? ? ? ?isrohams at yahoo.com
>
> ------------------------------------------------------------------------------
> 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.
>
> ------------------------------------------------------------------------------
>
>
>
> ------------------------------
>
> Message: 6
> Date: Wed, 16 Dec 2015 14:35:38 +0000 (UTC)
> From: Nitin Muttin <vu3tyg at yahoo.co.in>
> To: "amsatindia at yahoogroups.com" <amsatindia at yahoogroups.com>, "BB,
> AMSAT" <amsat-bb at amsat.org>, VUHAMS <vuhams at yahoogroups.com>,
> "isrohams at yahoogroups.com" <isrohams at yahoogroups.com>
> Cc: "giulio.manzoni at micro-space.org" <giulio.manzoni at micro-space.org>
> Subject: Re: [amsat-bb] [amsatindia] Telemetry Signals Heard from from
> Athenoxat-1
> Message-ID:
> <1463093728.2023426.1450276538901.JavaMail.yahoo at mail.yahoo.com>
> 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 at isac.gov.in [amsatindia]" <
> amsatindia at yahoogroups.com>
> To: "BB, AMSAT" <amsat-bb at amsat.org>; amsatindia at yahoogroups.com; VUHAMS
> <vuhams at yahoogroups.com>; isrohams at yahoogroups.com
> Cc: giulio.manzoni at micro-space.org
> 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 at isac.gov.in
> ? ? ? ? ? ?vu2wmy_mani at yahoo.com
> ? ? ? ? ? ?isrohams at yahoo.com
> 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 at isac.gov.in>
> | Reply via web post | ? | Reply to sender | ? | Reply to group
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>
> ------------------------------
>
> Message: 7
> Date: Wed, 16 Dec 2015 17:59:36 +0100
> From: Felix Paez <ea4gqs at gmail.com>
> To: amsat-bb at amsat.org
> Subject: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID:
> <
> CAGfY+e0JsnHWGn62Tvsac2kRSAX0zb0n9cuF6Lt33PgvBqmRFQ at mail.gmail.com>
> 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 at wd9ewk.net>
> To: "amsat-bb at amsat.org" <amsat-bb at amsat.org>
> Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID:
> <
> CAN6TEUfDxADq1yoHw3AEGaD+2FA5SQkQksya8XYmtz_6n0cn+Q at mail.gmail.com>
> 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: @WD9EWK
>
>
>
> On Wed, Dec 16, 2015 at 9:59 AM, Felix Paez <ea4gqs at gmail.com> 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 at destevez.net>
> To: "amsat-bb at amsat.org" <amsat-bb at amsat.org>
> Subject: Re: [amsat-bb] Elk Antenna, Midland CT 890 and Full Duplex
> Message-ID: <56719D88.3080502 at destevez.net>
> 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 at comcast.net>
> To: <amsat-bb at amsat.org>
> Subject: [amsat-bb] SatPC32c Problem..........
> Message-ID: <000301d13829$5bb38000$131a8000$@comcast.net>
> 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 at gmail.com>
> To: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] AO-7
> Message-ID:
> <CAGHu4f9aOUWSJmrND03t0AyEAT5_+6+x6eUCWZ=
> yKTgiAhBYsA at mail.gmail.com>
> 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 at gmail.com>:
>
> > > 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 at fisher.cc>
> To: Carmen Peca <carmenpeca at comcast.net>
> Cc: AMSAT BB <amsat-bb at amsat.org>
> Subject: Re: [amsat-bb] SatPC32c Problem..........
> Message-ID:
> <CABX7KxU8pcMFGVqPK+fdZE-z+cTn_0dFtqtUxM=
> 4qPtiHr1+xA at mail.gmail.com>
> 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 at comcast.net>
> 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
> >
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. 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
> >
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> Sent via amsat-bb at amsat.org.
> 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 10, Issue 385
> *****************************************
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