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CX2SA > SATDIG 08.12.08 00:05l 590 Lines 21230 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V3 637
Path: IZ3LSV<I4UKI<IR4U<CX2SA
Sent: 081207/2130Z @:CX2SA.LAV.URY.SA #:55435 [Minas] FBB7.00e $:55435_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Kenwood TH-F6A for AO-51 / SO-50?? (Andrew Glasbrenner)
2. Re: Kenwood TH-F6A for AO-51 / SO-50?? (Jim Leder)
3. Re: Question re rx/tx relays and diplexer (Nigel Gunn G8IFF/W8IFF)
4. Re: Kenwood TH-F6A for AO-51 / SO-50?? (Trey Brown)
5. Re: Kenwood TH-F6a (Clint Bradford)
6. Re: ISS/MKS sending SSTV (Scott Richardson)
7. Re: Kenwood TH-F6A for AO-51 / SO-50?? (Jim Leder)
8. Re: BBsat Call for ideas (JoAnne Maenpaa)
9. ARISS downlink frequencies (Ronald G. Parsons)
----------------------------------------------------------------------
Message: 1
Date: Sun, 7 Dec 2008 13:32:57 -0500
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Kenwood TH-F6A for AO-51 / SO-50??
To: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <C02C03F447AA48A3BDD51DCB962E18F8@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
The F6 is a great radio and I have one that I use a lot. However...it's not
full duplex. The D7 can be had for a similar cost, and is full duplex and
has the built in TNC for packet ops.
Full duplex operation really makes the FM satellites easy to operate, and
results in less of a logjam on the uplink because you know if you are
doubling with another station. When using it with an antenna like the arrow
or elk, you can also change the antenna orientation while transmitting to
peak your uplink signal at the satellite. All of the FM satellites use
linear receive whips, and adjusting the arrow for max signal will yield more
gain than the beam itself! (20 db cross polarization versus maybe 6db from
the 3 element yagi)
Now...if you use the F6 with the 817, you get full duplex on the FM AND SSB
satellites, because of the all mode receiver in the F6.
73, Drew KO4MA
AMSAT-NA VP Operations
----- Original Message -----
From: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, December 07, 2008 12:06 PM
Subject: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
> Thanks for reading this. I am considering buying an HT for AO-51 and
> SO-50
> as well as AO-27 (hopefully!). I have been using a Yaesu FT-817 and
> either
> an Arrow or Elk antenna and this has worked very well; however, an HT
> would
> be easier to carry around. I am looking for recommendations / warnings /
> etc. specific to the Kenwood TH-F6A. I would like some advice from those
> who have used the radio for satellite work before I shell out $320.00. I
> seriously considered a used IC-W32A on e-bay but it went for over $150.00
> and I couldn't see paying that much for something that may or may not work
> properly. Any insights would be greatly appreciated.
>
>
>
> Thanks,
>
>
>
> Guy
>
> N3SCR
>
> Finksburg, MD
>
> _______________________________________________
> 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: 2
Date: Sun, 7 Dec 2008 13:42:01 -0500
From: "Jim Leder" <k8cxm@xxxx.xxx>
Subject: [amsat-bb] Re: Kenwood TH-F6A for AO-51 / SO-50??
To: "Amsat" <AMSAT-BB@xxxxx.xxx>, "Guy Brauning"
<guyjeanbraun@xxxxxxx.xxx>
Message-ID: <547D1F8574B04DDC801A1FD71EB224FE@xxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I have used my Kenwood TH-F6A along with an Arrow antenna, and IMHO it works
just fine. You do need to get it programmed right and you need to get used
to switching between VFOs as you track the satellite and the Doppler effect
on frequency. It is NOT a full duplex radio like the W32A, and you will not
be able to hear yourself, but I have never felt that's been a problem.. I
programmed mine to transmit on one VFO (uplink) and be able to receive on
several different frequencies (downlink) on the other VFO. On the transmit
VFO, the squelch is closed all the way, while on the receive VFO, it's open
all the way. So, VFO A is set for uplink of 145.920 on memory channel 150
and on memory channels 152-153 I have them programmed for 435.290 and
435.295 (downlink which is in VFO B). 154 is center frequency of 435.300 and
of course 155 and 156 are set to 435.305 and 435.310. By switching between
VFOs I can change downlink channels/frequencies to fit the Doppler shift. A
little cumbersome, but that little radio works very well. You can follow a
similar scheme on the QRP channel of AO51 (mine is 160-166) and SO50 (mine
is 170-176-get the picture). I have made several contacts with it on the QRP
channels but have had no luck on SO50, which is a lot more difficult
satellite to hear.
I'm using it because it's what I had, and I'm happy to say with a little
use and practice you quickly get the hang of it.
Of course, either the W32A or the Kenwood TH-D7A do FULL duplex, but both
are no longer in production. Hearing yourself is nice, but not necessary.
Jim Bob Buckeye
AKA
**** Jim Leder****
K8CXM since 1961
IBM retiree since 1999
There are 10 types of people in this world -- those who understand binary
and those who don't.
----- Original Message -----
From: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, December 07, 2008 12:06 PM
Subject: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
> Thanks for reading this. I am considering buying an HT for AO-51 and
> SO-50
> as well as AO-27 (hopefully!). I have been using a Yaesu FT-817 and
> either
> an Arrow or Elk antenna and this has worked very well; however, an HT
> would
> be easier to carry around. I am looking for recommendations / warnings /
> etc. specific to the Kenwood TH-F6A. I would like some advice from those
> who have used the radio for satellite work before I shell out $320.00. I
> seriously considered a used IC-W32A on e-bay but it went for over $150.00
> and I couldn't see paying that much for something that may or may not work
> properly. Any insights would be greatly appreciated.
>
>
>
> Thanks,
>
>
>
> Guy
>
> N3SCR
>
> Finksburg, MD
>
> _______________________________________________
> 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: 3
Date: Sun, 07 Dec 2008 18:43:38 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Question re rx/tx relays and diplexer
To: Curt Nixon <cptcurt@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <493C195A.9010004@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Curt Nixon wrote:
> Do commercial coaxial relays for t/r use short the rx line when in tx?
> or do they leave it float?
No. I would recommend that you use a second low power relay to put 50R loads
across both in and out of your preamp.
>
> Also, should the 2M output on the diplexer for desense be terminated? or
> left open.
I think most people leave it open but personally, I would terminate it with a
50R resistor.
--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF W8IFF (have also held KC8NHF, M0NHF, 9H3GN)
1865 El Camino Drive, Xenia, OH 45385-1115, USA 937 825 5032
e-mail nigel@xxxxx.xxx www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
------------------------------
Message: 4
Date: Sun, 7 Dec 2008 12:36:49 -0600
From: "Trey Brown" <palintheus@xxxxx.xxx>
Subject: [amsat-bb] Re: Kenwood TH-F6A for AO-51 / SO-50??
To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx Guy Brauning <guyjeanbraun@xxxxxxx.xxx>
Message-ID:
<e79ccb000812071036k731bbd2eo5728bfd9959bf80e@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
You also cannot store cross band memories so when adjusting for doppler you
have to switch to the A or B vfo, whichever you are using for the downlink,
adjust frequency, then switch back. Shouldn't be a problem once you are used
to it since it's only one button turn the vfo hit the same button, but will
take some coordination.
On Sun, Dec 7, 2008 at 12:32 PM, Andrew Glasbrenner <
glasbrenner@xxxxxxxxxx.xxx> wrote:
> The F6 is a great radio and I have one that I use a lot. However...it's not
> full duplex. The D7 can be had for a similar cost, and is full duplex and
> has the built in TNC for packet ops.
>
> Full duplex operation really makes the FM satellites easy to operate, and
> results in less of a logjam on the uplink because you know if you are
> doubling with another station. When using it with an antenna like the arrow
> or elk, you can also change the antenna orientation while transmitting to
> peak your uplink signal at the satellite. All of the FM satellites use
> linear receive whips, and adjusting the arrow for max signal will yield
> more
> gain than the beam itself! (20 db cross polarization versus maybe 6db from
> the 3 element yagi)
>
> Now...if you use the F6 with the 817, you get full duplex on the FM AND SSB
> satellites, because of the all mode receiver in the F6.
>
> 73, Drew KO4MA
> AMSAT-NA VP Operations
>
> ----- Original Message -----
> From: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Sunday, December 07, 2008 12:06 PM
> Subject: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
>
>
> > Thanks for reading this. I am considering buying an HT for AO-51 and
> > SO-50
> > as well as AO-27 (hopefully!). I have been using a Yaesu FT-817 and
> > either
> > an Arrow or Elk antenna and this has worked very well; however, an HT
> > would
> > be easier to carry around. I am looking for recommendations / warnings /
> > etc. specific to the Kenwood TH-F6A. I would like some advice from those
> > who have used the radio for satellite work before I shell out $320.00. I
> > seriously considered a used IC-W32A on e-bay but it went for over $150.00
> > and I couldn't see paying that much for something that may or may not
> work
> > properly. Any insights would be greatly appreciated.
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Guy
> >
> > N3SCR
> >
> > Finksburg, MD
> >
> > _______________________________________________
> > 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
>
--
Trey
They who can give up essential liberty to obtain a little temporary safety,
deserve neither liberty nor safety.
- Benjamin Franklin
------------------------------
Message: 5
Date: Sun, 7 Dec 2008 11:18:03 -0800 (GMT-08:00)
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Kenwood TH-F6a
To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Message-ID:
<28033835.1228677483758.JavaMail.root@xxxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.x
xx>
Content-Type: text/plain; charset=UTF-8
Do you need 220 capability? The TH-F6a is a great HT...but if you do not need
220, you can spend a lot less for a FM-bird-capable HT. I use the Yaesu FT-60R
in my demos and presentations. Not because it's the "ultimate," but to show
folks that they don't have to spend an awful lot to get into ham satellites.
The FT-60 has a rather unique battery situation, too, compared to several
other HTs: Add its optional AA alkaline case and populate it with either NiMH
cells or alkalines, and you have the capability of working at FULL TX POWER.
Add the optional AA case to the TH-F6a, and you're working at one-half of one
Watt (alkalines only - no NiMH).
And the rest of the features: 1,000 memories, 108-to-a-gig RX, bulletproof
case design, strongest belt clip of ANY amateur HT chassis on the market...
If you decide upon the TH-F6a, stick withthe stock antenna for local work.
Although physically ugly, Kenwood put a lot of research time into that
antenna, and it is quite a capable performer. Of course, a Smiley 270A ($16)
or a Diamond SRH-320A ($50) will perform better - but work with the stock
antenna for your local repeaters first before you shell out bucks for after-
market antennas.
Clint Bradford, K6LCS
909-241-7666
--------------------------------------
Clint Bradford, K6LCS / KAF3359
909-241-7666 - cell
------------------------------
Message: 6
Date: Sun, 7 Dec 2008 14:19:28 -0500
From: "Scott Richardson" <scott@xxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ISS/MKS sending SSTV
To: "amsat" <amsat-bb@xxxxx.xxx>
Message-ID: <DD2FB0BCB19A4F8086F5FE3A17878BD3@xxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I copied inside ISS SSTV images at 1640z and pictures out the window at
1815z. I always miss the first second or two transmitted because of my
setup. It would be great to have a CW ID ahead of each SSTV transmission. I
heard this once during Richard Garriott's time on the station and it took
the guesswork out of when I should press 'record'.
I'm very much enjoying and appreciating the special ARISS activities. Thanks
to all who are making it happen!
73, Scott N1AIA
------------------------------
Message: 7
Date: Sun, 7 Dec 2008 14:31:45 -0500
From: "Jim Leder" <k8cxm@xxxx.xxx>
Subject: [amsat-bb] Re: Kenwood TH-F6A for AO-51 / SO-50??
To: "Amsat" <AMSAT-BB@xxxxx.xxx>, "Guy Brauning"
<guyjeanbraun@xxxxxxx.xxx>
Message-ID: <8D74234889364821BBF11D4AF4F4F31D@xxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Guy, I have an FT-857D in my car and an old Kenwood TM-G707A in the shack.
While neither will do full duplex either, both do a nice job on cross band.
The TH-F6A won't do cross band, but it still works just fine as I described
the method I use.
Good luck 73 ...
Jim Bob Buckeye
AKA
**** Jim Leder****
K8CXM since 1961
IBM retiree since 1999
There are 10 types of people in this world -- those who understand binary
and those who don't.
----- Original Message -----
From: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>
To: "'Jim Leder'" <k8cxm@xxxx.xxx>
Sent: Sunday, December 07, 2008 2:16 PM
Subject: RE: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
> Jim,
> Thanks very much for the detailed information about the TH-F6A. It
> sounds
> like, based on your experience, it will work very well for my intended
> use.
> I have programmed my FT-817 in a very similar manner to that which you
> described for the TH-F6A except that the 817 allows for split band memory
> storage so you don't have to manually switch VFOs while switching from TX
> to
> RX to compensate for Doppler, you just step through the preprogrammed
> memories which are set up for Doppler on both TX and RX frequencies. I
> think I could get used to working the TH-F6A the way you have described.
> (SO-50 is a lot tougher to work than AO-51.)Thanks a million!
>
> CUL,
> Guy
>
> -----Original Message-----
> From: Jim Leder [mailto:k8cxm@xxxx.xxxx
> Sent: Sunday, December 07, 2008 1:42 PM
> To: Amsat; Guy Brauning
> Subject: Re: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
>
> I have used my Kenwood TH-F6A along with an Arrow antenna, and IMHO it
> works
>
> just fine. You do need to get it programmed right and you need to get used
> to switching between VFOs as you track the satellite and the Doppler
> effect
> on frequency. It is NOT a full duplex radio like the W32A, and you will
> not
> be able to hear yourself, but I have never felt that's been a problem.. I
> programmed mine to transmit on one VFO (uplink) and be able to receive on
> several different frequencies (downlink) on the other VFO. On the transmit
> VFO, the squelch is closed all the way, while on the receive VFO, it's
> open
> all the way. So, VFO A is set for uplink of 145.920 on memory channel 150
> and on memory channels 152-153 I have them programmed for 435.290 and
> 435.295 (downlink which is in VFO B). 154 is center frequency of 435.300
> and
>
> of course 155 and 156 are set to 435.305 and 435.310. By switching between
> VFOs I can change downlink channels/frequencies to fit the Doppler shift.
> A
> little cumbersome, but that little radio works very well. You can follow a
> similar scheme on the QRP channel of AO51 (mine is 160-166) and SO50 (mine
> is 170-176-get the picture). I have made several contacts with it on the
> QRP
>
> channels but have had no luck on SO50, which is a lot more difficult
> satellite to hear.
> I'm using it because it's what I had, and I'm happy to say with a little
> use and practice you quickly get the hang of it.
> Of course, either the W32A or the Kenwood TH-D7A do FULL duplex, but both
> are no longer in production. Hearing yourself is nice, but not necessary.
>
> Jim Bob Buckeye
> AKA
> **** Jim Leder****
> K8CXM since 1961
> IBM retiree since 1999
>
> There are 10 types of people in this world -- those who understand binary
> and those who don't.
>
>
> ----- Original Message -----
> From: "Guy Brauning" <guyjeanbraun@xxxxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Sunday, December 07, 2008 12:06 PM
> Subject: [amsat-bb] Kenwood TH-F6A for AO-51 / SO-50??
>
>
>> Thanks for reading this. I am considering buying an HT for AO-51 and
>> SO-50
>> as well as AO-27 (hopefully!). I have been using a Yaesu FT-817 and
>> either
>> an Arrow or Elk antenna and this has worked very well; however, an HT
>> would
>> be easier to carry around. I am looking for recommendations / warnings /
>> etc. specific to the Kenwood TH-F6A. I would like some advice from those
>> who have used the radio for satellite work before I shell out $320.00. I
>> seriously considered a used IC-W32A on e-bay but it went for over $150.00
>> and I couldn't see paying that much for something that may or may not
>> work
>> properly. Any insights would be greatly appreciated.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Guy
>>
>> N3SCR
>>
>> Finksburg, MD
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com
> Version: 8.0.176 / Virus Database: 270.9.15/1834 - Release Date: 12/6/2008
> 4:55 PM
>
------------------------------
Message: 8
Date: Sun, 7 Dec 2008 13:34:19 -0600
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Subject: [amsat-bb] Re: BBsat Call for ideas
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000c01c958a2$cd518db0$67f4a910$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hello,
First of all congratulations to William PE1RAH on his pico transponder. This
is enabling-technology for getting transponders aboard the flocks of
cubesats. And, it represents a nice contribution toward solving the radio
problem the student designers are facing.
While reading Nuts and Volts magazine I came across a pre-packaged OEM
VHF/UHF transponder module from a company called Radiometrix. Below are two
links for you to find more information about their product lines ...
http://www.radiometrix.com/
http://www.lemosint.com/ (USA rep for Radiometrix)
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
Message: 9
Date: Sun, 7 Dec 2008 13:59:40 -0600
From: "Ronald G. Parsons" <w5rkn@xxxxx.xxx>
Subject: [amsat-bb] ARISS downlink frequencies
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Cc: Kenneth Ransom <ransomk@xxxxx.xxx>
Message-ID: <90E4F202FA6C49B49F51A09A936389B5@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
ARISS currently has four modes, Packet Radio (1200 and 9600), Voice, Cross-
band repeater, and SSTV. All modes use 145.800 MHz as the downlink frequency
except Packet which uses 145.825.
These last and next few weeks have (and will be) very exciting as all these
modes are being used. I currently keep several programs running just in case a
mode change occurs. I am using Ham Radio Deluxe for SSTV, AGWTracker for
Packet, and SatPC32 and SatPC32ISS for frequency control for all modes with my
Icom IC-910H.
Why couldn't Packet operate on 145.800 simplex instead of 145.825? Then one
could just listen to 145.800 and tell which mode is being used. Currently I
must switch between 800 and 825 if no mode is apparent.
Ron W5RKN
------------------------------
_______________________________________________
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 3, Issue 637
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