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CX2SA > SATDIG 05.06.08 01:30l 419 Lines 13293 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V3 284
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Sent: 080604/2334Z @:CX2SA.LAV.URY.SA #:8011 [Minas] FBB7.00e $:8011_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Possible SWR problems with 70cm antenna (Roger Kolakowski)
2. Re: Possible SWR problems with 70cm antenna (Diane Bruce)
3. 2.4 GHz Signal Sources & Downconverters (K5GNA(AT)aol.com)
4. Call for Papers--2008 ARRL/TAPR Digital Communications
Conference (Ford, Steve, WB8IMY)
5. Re: DO-64 heard over VK (Nigel Gunn G8IFF/W8IFF)
6. Re: 2.4 GHz Downconverters Are In Stock Again (David Barber)
7. Re: Possible SWR problems with 70cm antenna (i8cvs)
8. Re: DO-64 heard over VK (i8cvs)
9. Re: DO-64 heard over VK (Miguel Menendez)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Jun 2008 08:01:27 -0400
From: "Roger Kolakowski" <rogerkola(AT)aol.com>
Subject: [amsat-bb] Re: Possible SWR problems with 70cm antenna
To: <amsat-bb(AT)amsat.org>
Message-ID: <00b001c8c63a$ba0435a0$0200a8c0(AT)Tanguray>
Content-Type: text/plain; charset="iso-8859-1"
"... The way
> > the power out meter on my radio acts, it leads me to believe I may
> > have an SWR issue. Unfortunately I don't own or have access to an
> > SWR meter or anylyzer capable of working at 70Cm..."
You don't mention what rig you have but many of the modern transceivers have
High SWR protection circuits and will cut back on the power as evidenced by
the meter already in the rig in the presence of return power.
If you have a good dummyload, note the power meter reading directly into it.
It ahould be high on the scale.
Then compare it to your antenna meter reading. If it drops down it's time to
start isolating parts of the antenna system using the same method.
Watch your coaxial jumpers. Your connecters as previously noted, and one
stab in the dark...check your power supply voltage to make sure you are
maintaining your 13.6 os so on transmit. RF into some power supplies drives
them funky.
Maybe you can borrow a meter from a club member or just rebuild the whole
shooting match. You already have all the parts. There is not much to those
antennas so I would assume, if you have a problem it is coax or matching
connections related.
Roger
WA1KAT
------------------------------
Message: 2
Date: Wed, 4 Jun 2008 07:59:13 -0400
From: Diane Bruce <db(AT)db.net>
Subject: [amsat-bb] Re: Possible SWR problems with 70cm antenna
To: Michael Tondee <mat_62(AT)netcommander.com>
Cc: amsat-bb <amsat-bb(AT)amsat.org>
Message-ID: <20080604115913.GA88344(AT)night.db.net>
Content-Type: text/plain; charset=us-ascii
On Tue, Jun 03, 2008 at 08:33:11PM -0400, Michael Tondee wrote:
...
> I'm going to take a wild shot in the dark here and ask the bb because I sure
don't know. Would it be possible to put my 2 meter SWR meter in the 70cm line
and at least get a ballpark figure of SWR? Or would the reading be so far off,
it would be useless?
My advice is to stick your swr bridge on a 70cm line with a 50 ohm dummy
load and see how close it reads to 1:1. It's possible it might work.
- 73 Diane VA3DB
--
- db(AT)FreeBSD.org db(AT)db.net http://www.db.net/~db
------------------------------
Message: 3
Date: Wed, 4 Jun 2008 10:44:52 EDT
From: K5GNA(AT)aol.com
Subject: [amsat-bb] 2.4 GHz Signal Sources & Downconverters
To: amsat-bb(AT)amsat.org
Message-ID: <cd7.31dc8920.35780464(AT)aol.com>
Content-Type: text/plain; charset="US-ASCII"
To All:
Thanks to all that have responded.
I have a large number of 2.4 GHz weatherproof Signal sources available for
$19.95, but I only had listed 2 at a time on Ebay (there listing fees are too
high). I have increased the quantity, so they will be available for all
those who want one.
Ebay seller = K5GNA
Webpage = _www.k5gna.com_ (http://www.k5gna.com) there is a link here at
the top for my Ebay items.
Anyone who doesn't want to use Ebay can contact me directly. Check them out
on Ebay for pictures, links and other Info. The G0ORY links go into some
detail on what other things that you can do with these Gardiner
downconverters
and how to get into them.
I now have the 12 MHz computer crystals to ship with the sources at no extra
cost. These put you at about 2400.020 MHz
There are still plenty of the TSI 2.4 GHZ K5GNA downconverters available --
they will not be on Ebay for a while, just here on the AMSAT BB.
TNX & 73,
Bob
K5GNA
**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4?&NCID=aolfod00030000000002)
------------------------------
Message: 4
Date: Wed, 4 Jun 2008 11:27:26 -0400
From: "Ford, Steve, WB8IMY" <sford(AT)arrl.org>
Subject: [amsat-bb] Call for Papers--2008 ARRL/TAPR Digital
Communications Conference
To: "RTTY Reflector" <rtty(AT)contesting.com>, <amsat-bb(AT)AMSAT.Org>,
<vhf(AT)w6yx.stanford.edu>, <psk31(AT)bipt106.bi.ehu.es>,
<digitalradio(AT)yahoogroups.com>
Message-ID:
<AD6F46BB3421B241903D155572BA86FE03BC0684(AT)cartagia.ARRLHQ.ORG>
Content-Type: text/plain; charset="us-ascii"
Technical papers are solicited for presentation at the 27th Annual ARRL
and TAPR Digital Communications Conference to be held September 26-28,
2008 in Chicago, Illinois. These papers will also be published in the
Conference Proceedings (you do NOT need to attend the conference to have
your paper included in the Proceedings). The submission deadline is July
31, 2008. Please send papers to:
Maty Weinberg
ARRL
225 Main St
Newington, CT 06111
or you can make your submission via e-mail to: maty(AT)arrl.org
Papers will be published exactly as submitted and authors will retain
all rights.
73 . . . Steve, WB8IMY
ARRL
------------------------------
Message: 5
Date: Wed, 04 Jun 2008 16:12:17 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel(AT)ngunn.net>
Subject: [amsat-bb] Re: DO-64 heard over VK
To: john heath <g7hia(AT)btinternet.com>
Cc: amsat <amsat-bb(AT)amsat.org>
Message-ID: <4846BEE1.4070807(AT)ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
How about stop whinging.
If you don't want to know about the "non transponder" sats then edit them out
of your keps download.
Spacetrack allows you to compile a favourites list.
john heath wrote:
> How about Oscar numbers issued only for satellites with working
> transponders.
>
> 73 John g7hia
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
>
--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. 59 Beadlemead, Milton Keynes, MK6 4HF, England.
Tel +44 (0)1908 604004 mobile +44 (0)7951079089
e-mail nigel(AT)ngunn.net www http://www.ngunn.net
Amateur radio stations G8IFF, W8IFF (was KC8NHF)
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
Dayton ARA #2128, AMSAT-NA AMSAT-UK, LM-1691, MKARS,
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
------------------------------
Message: 6
Date: Wed, 4 Jun 2008 17:26:02 +0100
From: "David Barber" <david.barber(AT)dbelectronics.co.uk>
Subject: [amsat-bb] Re: 2.4 GHz Downconverters Are In Stock Again
To: <amsat-bb(AT)amsat.org>
Message-ID: <001e01c8c65f$ae5f67e0$6401a8c0(AT)DBXPPPOR>
Content-Type: text/plain; charset="us-ascii"
As an endorsement of these items for anyone in the UK considering
purchasing.
I bought one from Bob a while back. It arrived swiftly, well packed and the
performance was excellent.
Don't believe all the doom and gloom merchants re: 2.4GHz. I used mine
hand-held with the corner reflector coupled to an FT-817ND with superb
results and no problems with the many surrounding Wi-Fi networks.
Only complaint I had was that UK customs decided to take their wedge and the
courier charged me for the privilege of collecting it on their behalf!!
David
-----Original Message-----
From: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org] On
Behalf Of K5GNA(AT)aol.com
Sent: 04 June 2008 04:06
To: amsat-bb(AT)amsat.org
Subject: [amsat-bb] 2.4 GHz Downconverters Are In Stock Again
Hello All:
My 2.4 GHz downconverters and corner reflectors are back in stock, ready
for
immediate shipment. I have just shipped the downconverters to all who were
on my waiting list and had previously responded.
Anyone interested in my downconverters or parts can check them out on my
website -- it has been updated.
_www.k5gna.com_ (http://www.k5gna.com)
Please contact me for quotes on shipping at the website or at:
_k5gna(AT)aol.com_ (mailto:k5gna(AT)aol.com)
TNX & 73,
Bob
K5GNA
**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4?&NCID=aolfod00030000000002)
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: 7
Date: Wed, 4 Jun 2008 19:56:28 +0200
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Re: Possible SWR problems with 70cm antenna
To: "Michael Tondee" <mat_62(AT)netcommander.com>, "amsat-bb"
<amsat-bb(AT)amsat.org>
Message-ID: <001c01c8c66c$5161f140$0201a8c0(AT)tin.it>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Michael Tondee" <mat_62(AT)netcommander.com>
To: "amsat-bb" <amsat-bb(AT)amsat.org>
Sent: Wednesday, June 04, 2008 2:33 AM
Subject: [amsat-bb] Possible SWR problems with 70cm antenna
> I'm having some problems with a homebrew lineasrly polarized "cheap yagi"
for 70cm. I don't have any success hearing myself on VO-52 or AO-7. This
antenna used to work reasonably well for both. The way the power out meter
on my radio acts, it leads me to believe I may have an SWR issue.
Unfortunately I don't own or have access to an SWR meter or anylyzer capable
of working at 70Cm.
> I'm going to take a wild shot in the dark here and ask the bb because I
sure don't know. Would it be possible to put my 2 meter SWR meter in the
70cm line and at least get a ballpark figure of SWR? Or would the reading be
so far off, it would be useless?
> I'm not intending to try and tune the antenna in this manner, I just want
to get some indication as to if SWR is indeed the problem.
> I must confess I don't know what the frequency range determining elements
of an SWR bridge are. I must have missed that at some point or the other.
> Any other ways to determine if I have an SWR problem without a meter? It's
just not in the budget to buy one right now.
> Any suggestions are appreciated.
> Tnx and 73,
> Michael, W4HIJ
Hi Michael, W4HIJ
To measure the VSWR with accuracy you can build by your self a set of
inexpensive directional couplers ranging from 100 MHz to 10 GHz using
semirigid coax cables as described into the RSGB Microwave Handbook Volume 2
pages 10.13 to 10.18
73" de
i8CVS Domenico
------------------------------
Message: 8
Date: Wed, 4 Jun 2008 20:08:27 +0200
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Re: DO-64 heard over VK
To: "Nigel Gunn G8IFF/W8IFF" <nigel(AT)ngunn.net>, "john heath"
<g7hia(AT)btinternet.com>
Cc: amsat <amsat-bb(AT)amsat.org>
Message-ID: <003e01c8c66d$fd0112a0$0201a8c0(AT)tin.it>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Nigel Gunn G8IFF/W8IFF" <nigel(AT)ngunn.net>
To: "john heath" <g7hia(AT)btinternet.com>
Cc: "amsat" <amsat-bb(AT)amsat.org>
Sent: Wednesday, June 04, 2008 6:12 PM
Subject: [amsat-bb] Re: DO-64 heard over VK
> How about stop whinging.
> If you don't want to know about the "non transponder" sats then edit them
out of your keps download.
> Spacetrack allows you to compile a favourites list.
>
>
> john heath wrote:
> > How about Oscar numbers issued only for satellites with working
> > transponders.
> >
> > 73 John g7hia
> >
Hi John, G7HIA
For Oscar numbars issued only for satellites with working transponders
I suggest to use the "imaginary numbars" as for example OSCAR j73
73" de
i8CVS Domenico
------------------------------
Message: 9
Date: Wed, 4 Jun 2008 20:46:43 +0200
From: Miguel Menendez <ea1bcu(AT)amsat.org>
Subject: [amsat-bb] Re: DO-64 heard over VK
To: David <vk5dg(AT)aapt.net.au>
Cc: amsat-bb(AT)amsat.org
Message-ID: <5510466537.20080604204643(AT)amsat.org>
Content-Type: text/plain; charset=us-ascii
Hi David
It would be interesting to know and verify the frequency of listening.
> Hello All,
> Just hear DO-64 over VK (2008/06/03:23:40 UTC). Even managed to see the
> S-meter go to S7 on my FT-817 - nice and loud. First reception of DO-64
> since 22nd May and 10 attempts.
> 73 de David VK5DG
--
73,
Miguel, EA1BCU
www.ea1bcu.tk
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. 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 284
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