Heading to the Desert RATS ham Fest tomorrow? If you want a new Arrow II sat antenna with duplexer for twenty bucks off normal HRO price, contact me ASAP. Only two available at this discount.
Clint, K6LCS 909-241-7666
Sent from my iPod.
On Jan 29, 2010, at 12:00, amsat-bb-request@amsat.org wrote:
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Today's Topics:
- Re: A0-27 on Sat the 30th (Clint Bradford)
- Re: A0-27 on Sat the 30th (Patrick STODDARD (WD9EWK/VA7EWK))
- FO-29 (David - KG4ZLB)
- Re: Heard on FO-29 (i8cvs)
- Re: FO-29 (w6zkh@comcast.net)
- HO-68 Schedule - 01-07 Feb 2010 (Alan Kung)
- Re: HO-68 Schedule - 01-07 Feb 2010 (Peter Scheller)
- Re: HO-68 29-01 1320utc (Pedro A. Perez)
- Re: [Mw] Satellite to carry Amateur Radio 5840.00 MHztelemetry beacon (Stephen Hicks, N5AC)
- DK7ZB 435MHz aerial question (Phil)
- updated pseudo moon keps (Bob DeVarney W1ICW)
- Re: DK7ZB 435MHz aerial question (Stan, W1LE)
- ND9M Road Trip Update #3 (claryco@aol.com)
- More great FO-29 passes (w6zkh@comcast.net)
- UX-14 (Jim)
Message: 1 Date: Thu, 28 Jan 2010 13:14:28 -0800 From: Clint Bradford clintbrad4d@earthlink.net Subject: [amsat-bb] Re: A0-27 on Sat the 30th To: amsat-bb@amsat.org Message-ID: 0CE3A982-FA46-4B8C-A7DE-33FD0BA78AF3@earthlink.net Content-Type: text/plain; charset=us-ascii
PATRICK - ONE OF THE HARDEST WORKIN' AMSAT-TERS>> ... I will have a demonstration using the AO-27 satellite just after 2.00pm ...
I am showing a pass at 1:01PM Pacific - is that the same pass, Patrick?
I will be working it at the Desert RATS HamFest in Palm Springs.
Clint, K6LCS
Message: 2 Date: Thu, 28 Jan 2010 16:52:28 -0700 From: "Patrick STODDARD (WD9EWK/VA7EWK)" amsat-bb@wd9ewk.net Subject: [amsat-bb] Re: A0-27 on Sat the 30th To: amsat-bb@amsat.org Message-ID: 2e18ad3e1001281552h28d4a6f6qf3d06bb31c180884@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1
Clint,
I am showing a pass at 1:01PM Pacific - is that the same pass, Patrick?
That will be the same pass. I think the software predicts the start of the 7- minute repeater time around 6 minutes past the hour, and I will be on as KM7CC.
I will be working it at the Desert RATS HamFest in Palm Springs.
Hope to hear you on Saturday.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/
Message: 3 Date: Thu, 28 Jan 2010 19:53:51 -0500 From: David - KG4ZLB kg4zlb@googlemail.com Subject: [amsat-bb] FO-29 To: amsat-bb@amsat.org Message-ID: 4B62319F.5080007@gmail.com Content-Type: text/plain; charset="iso-8859-1"
So nice to hear FO-29 booming again on this last pass at 00:46, really strong and loud - congrats to the team on getting this one back in shape, very much appreciated!
And hi to VE4EMU who obliged me with a contact although I lost you completely after the exchange!
A couple of others on as well!
-- David KG4ZLB www.kg4zlb.com
Message: 4 Date: Fri, 29 Jan 2010 02:07:27 +0100 From: "i8cvs" domenico.i8cvs@tin.it Subject: [amsat-bb] Re: Heard on FO-29 To: "AMSAT-BB" amsat-bb@amsat.org, "Pierre van Deventer" pierrevd@icon.co.za, "Hal Lund ZS6WB" zs6wb@telkomsa.net, "Mineo Wakita" ei7m-wkt@asahi-net.or.jp Cc: fernandodibartolomeo@alice.it, I6IBE Ivo brugneraivo@alice.it, Marco Niccolini IW5EJM m.niccolini@gmail.com Message-ID: 007501caa07f$6cd0e280$0201a8c0@tin.it Content-Type: text/plain; charset="iso-8859-1"
----- Original Message ----- From: "Hal Lund ZS6WB" zs6wb@telkomsa.net To: "I8CVS Dom" domenico.i8cvs@tin.it Sent: Thursday, January 28, 2010 7:59 AM Subject: Heard on FO-29
Hello Dom
I just wanted to let you know that I heard you calling this morning on FO-29 at 0615 utc. You were on CW on a downlink of about 435.840 MHz. You were heard for several minutes and I copied your call distinctly several times.
You were probably transmitting on AO-7 at the time as AO-7 and FO-29 were very close together but AO-7 was just below a ridge to the west of me and I could not hear it directly at that time.
We could almost make it on AO-7 if my station wasn't sitting in a bit of a hole.
It appears that FO-29 has been operational for several hours continuously now so that looks very promising.
73 - Hal ZS6WB
Pretoria (KG44ee)
Hello Hal, ZS6WB and All on the List
Tank you very much for the above important information and I will try to explain you what was really happening this night/morning on day 28 jan at 06:15 UTC
Infact during orbit 61091 at 06:15 UTC I was transmitting to AO-07 around 432.158 MHz searching to be translated exactly on 145.940 MHz at the exact moment in wich AO-7 was at the very LOS for me with less than 0.3? elevation on South at the end of the descending orbit 61091 from North to South when AO-7 was about over ZS-land in South Africa and despite a few hills 20 km away over my horizon I received back my CW succesfully up to 0.3? elevation.
To determine my exact uplink frequency in order to be translated by AO-7 at 145.940 MHz +/- at the very AOS moment when the bird comes to me from South to North during an ascending orbit it was also very important for me this night because in the following days I plan to contact on skedule at 145.940 +/- MHz the friend ZS6BB, Pierre in KG43EU
But what was really happening this night ? You are right !
The distance into free space between AO-7 and FO-29 was about 1500 km at 06:15 UTC and both satellites where in mutual covisibility so that my 145.940 MHz CW signal that was translated by AO-7 was received by FO-29 and retranslated by FO-29 in 435.840 MHz at 06:15 UTC when you received my CW signal in Pretoria KG44EE through two satellites !
In more details at 06.15 UTC the subsatellite point (SSP) of AO7 was over Nigeria at 8.557? Latitude North and 10.095? Longitude Est and his footprint was not completely covering ZS land while the SSP of FO-29 was over Zaire at 6.482? Latitude South and Longitude 16.500? Est but his footprint was fully including ZS land where you was able to receive me in KG44EE
The above demonstrates that when the footprints of two satellites about overlaps a two way QSO between two satellites is possible particularly on CW provided that the uplink and downlink frequency bands are the same and one station transmit to one satellite in 70 cm listening in 2 meters while the other one transmit to the other satellite in 2 meters listening in 70 cm
Unfortunately this is not the case betwen AO-7 and FO-29 because the 70 cm bands are different 435.800 to 435.900 MHz for FO-29 and 432.125 to 432.175 MHz for AO-7 so that only one way two satellite link is possible as you Hal experienced because the same 2 meters band is in common between both satellites.
The above reception of my signal by you via FO-29 also demontrates that actually FO-29 is working very well after a very long QRT because it was so sensitive to receive my signal in 2 meters via AO-7 and retranslate it into 70 cm with sufficient power to be received by you in 70 cm in Pretoria South Africa
By the way since you in KG44EE are very close to Pierre in KG43EU I am confident the at the end of testing and try with Pierre via AO-7 I can try a QSO via AO-7 as well with you and I will informe you about if you agree.
The distance from my JN70ES and Pierre in KG43EU is 7548 km and with you in KG44EE is 7511 km both no bad distances from South Italy and South Africa via AO-7
Best 73" de
i8CVS Domenico
Message: 5 Date: Fri, 29 Jan 2010 02:47:45 +0000 (UTC) From: w6zkh@comcast.net Subject: [amsat-bb] Re: FO-29 To: kg4zlb@gmail.com Cc: amsat-bb amsat-bb@amsat.org Message-ID:
<1461961093.1075411264733265894. JavaMail.root@sz0155a.westchester.pa.mail.comcast.net>
Content-Type: text/plain; charset=utf-8
Pass over central US was still in operation with several SSB stations on. I was on CW but no contacts. Pass was a 19 deg pass for me, and the 0408 utc pass will be 40 degs so hopefully more West Coast will be on...
John W6ZKH
----- Original Message ----- From: "David - KG4ZLB" kg4zlb@googlemail.com To: amsat-bb@amsat.org Sent: Thursday, January 28, 2010 4:53:51 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] FO-29
So nice to hear FO-29 booming again on this last pass at 00:46, really strong and loud - congrats to the team on getting this one back in shape, very much appreciated! And hi to VE4EMU who obliged me with a contact although I lost you completely after the exchange! A couple of others on as well! -- David KG4ZLB www.kg4zlb.com _______________________________________________ Sent via AMSAT-BB@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: 6 Date: Fri, 29 Jan 2010 11:56:13 +0800 From: "Alan Kung" alankung@public3.bta.net.cn Subject: [amsat-bb] HO-68 Schedule - 01-07 Feb 2010 To: amsat-bb@amsat.org Message-ID: 002501caa098$c1711fd0$6c01a8c0@ba1duoffice Content-Type: text/plain; charset="gb2312"
31 Jan. 2010, FM/Digital Transponder
19:20...Turn On South Africa, Europe, NA 20:05...Turn Off
23:05...Turn On South Africa,South America,Europe, NA,North Pole,North Asia 23:50...Turn Off
01 Feb. 2010, FM/Digital Transponder
02:35...Turn On South Pole, South America,NA,North Asia,North Pole 03:20...Turn Off
11:40...Turn On Australia,New Zealand,South Asia, East Asia,North Asia,Europe 12:25...Turn Off
19:05...Turn On South Africa,Europe,NA,North Pole,North Asia 19:50...Turn Off
02 Feb. 2010, FM/Digital Transponder
00:30...Turn On South America,NA,North Asia, North Pole 01:15...Turn Off
04:20...Turn On South America,NA,Middle Asia 05:05...Turn Off
15:15...Turn On Australia, India,South Asia,Europe,NA 16:00...Turn Off
18:45...Turn On Africa,Europe,NA 19:30...Turn Off
03 Feb. 2010, FM/Digital Transponder
00:20...Turn On South America, NA,North Asia 01:05...Turn Off
03:45...Turn On South Pole,South America, NA North Asia, North Pole 04:30...Turn Off
13:10...Turn On Australia, South Asia, East Asia,North Asia 13:26...Turn Off
16:55...Turn On India,Middle East Asia,Europe,NA, 17:40...Turn Off
04 Feb. 2010, FM/Digital Transponder
01:40...Turn On South Pole,South America,NA,North Asia 02:25...Turn Off
01:55...Turn On South America,NA,North Asia 02:40...Turn Off
03:45...Turn On South America,NA,North Asia 04:30...Turn Off
10:50...Turn On Oceania,South Asia,East Asia,North Asia 11:35...Turn Off
16:35...Turn On India,Middle Asia,Africa,Europe,NA 17:20...Turn Off
20:00...Turn On Africa,Europe,NA,North Asia 20:45...Turn Off
05 Feb. 2010, FM/Digital Transponder
01:25...Turn On South America,NA,North Asia 02:10...Turn Off
03:15...Turn On South America,NA,North Asia 04:00...Turn Off
12:37...Turn On Oceania,South Asia, East Asia, North Asia 12:52...Turn Off
16:15...Turn On India,Middle Asia,Europe,NA 17:00...Turn Off
19:45...Turn On Africa,Europe,NA 20:30...Turn Off
06 Feb. 2010, FM/Digital Transponder
01:10...Turn On South America,NA,North Asia 01:55...Turn Off
10:15...Turn On Oceania,East Asia,North Asia,Europe 11:00...Turn Off
16:00...Turn On India,Middle Asia,Europe,NA 16:45...Turn Off
19:25...Turn On Africa,Europe,NA,North Asia 20:10...Turn Off
07 Feb. 2010, FM/Digital Transponder
00:50...Turn On South America,NA,North Asia 01:35...Turn Off
01:47...Turn On South Asia,East Asia, North Asia 02:02...Turn Off
73 Alan Kung, BA1DU HO-68(XW-1) Project Manager www.camsat.cn
Message: 7 Date: Thu, 28 Jan 2010 20:43:07 -1000 From: Peter Scheller nh6vb@msn.com Subject: [amsat-bb] Re: HO-68 Schedule - 01-07 Feb 2010 To: alankung@public3.bta.net.cn, amsat-bb amsat-bb@amsat.org Message-ID: BAY141-W25F1B4551950FCE07DA111E15B0@phx.gbl Content-Type: text/plain; charset="iso-8859-1"
Mr. Kung,
It is heartbreaking to watch the HO-68 schedule, and see the satellite virtually cutting off
seconds before the footprint reaches KH6 land. We are not asking to amend an existing and
published schedule, but would be grateful for future considerations.
Respectfully submitted
Peter Scheller, NH6VB
From: alankung@public3.bta.net.cn To: amsat-bb@amsat.org Date: Fri, 29 Jan 2010 11:56:13 +0800 Subject: [amsat-bb] HO-68 Schedule - 01-07 Feb 2010
31 Jan. 2010, FM/Digital Transponder
19:20...Turn On South Africa, Europe, NA 20:05...Turn Off
23:05...Turn On South Africa,South America,Europe, NA,North Pole,North Asia 23:50...Turn Off
01 Feb. 2010, FM/Digital Transponder
02:35...Turn On South Pole, South America,NA,North Asia,North Pole 03:20...Turn Off
11:40...Turn On Australia,New Zealand,South Asia, East Asia,North Asia,Europe 12:25...Turn Off
19:05...Turn On South Africa,Europe,NA,North Pole,North Asia 19:50...Turn Off
02 Feb. 2010, FM/Digital Transponder
00:30...Turn On South America,NA,North Asia, North Pole 01:15...Turn Off
04:20...Turn On South America,NA,Middle Asia 05:05...Turn Off
15:15...Turn On Australia, India,South Asia,Europe,NA 16:00...Turn Off
18:45...Turn On Africa,Europe,NA 19:30...Turn Off
03 Feb. 2010, FM/Digital Transponder
00:20...Turn On South America, NA,North Asia 01:05...Turn Off
03:45...Turn On South Pole,South America, NA North Asia, North Pole 04:30...Turn Off
13:10...Turn On Australia, South Asia, East Asia,North Asia 13:26...Turn Off
16:55...Turn On India,Middle East Asia,Europe,NA, 17:40...Turn Off
04 Feb. 2010, FM/Digital Transponder
01:40...Turn On South Pole,South America,NA,North Asia 02:25...Turn Off
01:55...Turn On South America,NA,North Asia 02:40...Turn Off
03:45...Turn On South America,NA,North Asia 04:30...Turn Off
10:50...Turn On Oceania,South Asia,East Asia,North Asia 11:35...Turn Off
16:35...Turn On India,Middle Asia,Africa,Europe,NA 17:20...Turn Off
20:00...Turn On Africa,Europe,NA,North Asia 20:45...Turn Off
05 Feb. 2010, FM/Digital Transponder
01:25...Turn On South America,NA,North Asia 02:10...Turn Off
03:15...Turn On South America,NA,North Asia 04:00...Turn Off
12:37...Turn On Oceania,South Asia, East Asia, North Asia 12:52...Turn Off
16:15...Turn On India,Middle Asia,Europe,NA 17:00...Turn Off
19:45...Turn On Africa,Europe,NA 20:30...Turn Off
06 Feb. 2010, FM/Digital Transponder
01:10...Turn On South America,NA,North Asia 01:55...Turn Off
10:15...Turn On Oceania,East Asia,North Asia,Europe 11:00...Turn Off
16:00...Turn On India,Middle Asia,Europe,NA 16:45...Turn Off
19:25...Turn On Africa,Europe,NA,North Asia 20:10...Turn Off
07 Feb. 2010, FM/Digital Transponder
00:50...Turn On South America,NA,North Asia 01:35...Turn Off
01:47...Turn On South Asia,East Asia, North Asia 02:02...Turn Off
73 Alan Kung, BA1DU HO-68(XW-1) Project Manager www.camsat.cn
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Message: 8 Date: Fri, 29 Jan 2010 07:44:09 +0100 From: "Pedro A. Perez" eb4dka@teleline.es Subject: [amsat-bb] Re: HO-68 29-01 1320utc To: amsat-bb@amsat.org Message-ID: 77E3AE86412946B791AF947425446532@gfas Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original
Yep! I'll try to work from my mobile station from IM79.
Pedro EB4DKA http://eb4dka.laserenadigital.com
----- Original Message ----- From: "jp-byj-free" jp.f6byj@free.fr To: amsat-bb@amsat.org Sent: Thursday, January 28, 2010 7:10 PM Subject: [amsat-bb] HO-68 29-01 1320utc
Hi
Ho-68 Linear Transponder Tomorrow 1320UTC very good conditions for QSO NorthAmerica - Europe.
S'73 Jep.
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Message: 9 Date: Thu, 28 Jan 2010 13:41:48 -0600 From: "Stephen Hicks, N5AC" n5ac@n5ac.com Subject: [amsat-bb] Re: [Mw] Satellite to carry Amateur Radio 5840.00 MHztelemetry beacon To: Graham Shirville g.shirville@btinternet.com Cc: microwave@lists.eclectechs.com, Amsat Reflector amsat-bb@amsat.org, Stan stan@capecod.com Message-ID: 49b964731001281141s5a6745fbi7df880166cf3408e@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1
I'd be happy to program the additional frequency in the A32 if that would help. Let me know if you would like this done. generally, I add it to the software and then state what release it is in and then any after that release will always have that frequency.
73, Steve
Sent from Austin, Texas, United States
On Thu, Jan 28, 2010 at 12:10, Graham Shirville g.shirville@btinternet.comwrote:
Hi Stan,
The website http://www.unisec.jp/unitec-1/en/cooperation.html gives quite a lot of info as well...if you wish to make direct contact then you can email Naomi Kurahara703kurahara@gmail.com
73
Graham G3VZV ----- Original Message ----- From: "Stan" stan@capecod.com To: "Trevor ." m5aka@yahoo.co.uk Cc: microwave@lists.eclectechs.com; "Amsat Reflector" < amsat-bb@amsat.org>; "Stephen Hicks, N5AC" n5ac@n5ac.com Sent: Wednesday, January 27, 2010 3:25 PM Subject: [amsat-bb] Re: [Mw] Satellite to carry Amateur Radio 5840.00 MHztelemetry beacon
This satellite holds some promise of a decent and doable microwave
technical challenge.
It will be possible to use our 5760 Transverters for a RX only application, maybe with minor tweaking.
The LO is 5616 MHz, with the RF of 5840 MHz, the IF is 224 MHz, right in the US 222 MHz band.
Maybe with a bigger dish, and a very low noise figure preamplifier, optimized at 5840 MHz, we could be in the UNITEC-1 deep space telemetry collection business.
The DEMI A32 LO with an external 10 MHz reference, can add the frequency stability needed. Or maybe Steve, N5AC, can preprogramm the A32 for a 5,840-145= 5,695 / 5 = 1,139.0 MHz
A reasonable challenge this winter morning, as I sip my lukewarm tea at the dining room table.
But more questions are raised:
- Keplerian elements are great for satellites, but once UNITEC1
enters deep space, what do we use to calculate and predict the path for our accurate tracking ?
- Is there anything special about the modulation scheme ?
Stan, W1LE Cape Cod FN41sr
Trevor . wrote:
On May 20 Japan is planning to launch four "CubeSats". The largest of them, UNITEC-1, will carry a 15 watt Amateur Radio 5840.00 MHz telemetry beacon and travel into deep space towards Venus
Three of the satellites will carry Amateur Radio payloads. On the AMSAT bulletin board Mineo Wakita JE9PEL writes
Four CubeSats in Japan are planned to launch at 20 May 2010 together with PLANET-C which belongs to JAXA by H-IIA rocket. http://www.jaxa.jp/index_e.html
UNITEC-1, NPO UNISEC (University Space Engineering Consortium) 5.8GHz http://www.unisec.jp/unitec-1/en/top.html
Negai*", Soka University 437.305MHz CW, Packet 1200bps FSK AX.25 http://kuro.t.soka.ac.jp/main.html
WASEDA-SAT2, Waseda University 437.485 MHz CW(FM), PCM-FSK(FM) 9600bps http://www.miyashita.mmech.waseda.ac.jp/Waseda-Sat2/index.htm
KSAT, Kagoshima University Uplink: S-band(2GHz, 10kbps), Downlink: Ku-band(13.275GHz, 10kbps/ 1Mbps) http://www.sci.kagoshima-u.ac.jp/~nishio/download/Ukaren2008Nishio.pdf
IARU Amateur Satellite Frequency Coordination information Unitec-1 http://www.amsat.org.uk/iaru/finished_detail.asp? serial=141 Negai http://www.amsat.org.uk/iaru/finished_detail.asp?serial=90 WASEDA-SAT2 http://www.amsat.org.uk/iaru/finished_detail.asp?serial=123
AMSAT Bulletin Board AMSAT-BB http://www.amsat.org/amsat-new/tools/maillist/
AMSAT-UK publish a colour A4 newsletter, OSCAR News, that is full of Amateur Satellite information. Join online at https://secure.amsat.org.uk/subs_form/
73 Trevor M5AKA Daily Amateur Radio News (Email/RSS): http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Use Form at: http://www.southgatearc.org/news/your_news_1.htm
Microwave mailing list microwave@lists.valinet.com http://www.valinet.com/mailman/listinfo/microwave
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Message: 10 Date: Fri, 29 Jan 2010 16:53:18 +1000 From: Phil phillor@telstra.com Subject: [amsat-bb] DK7ZB 435MHz aerial question To: amsat-bb@amsat.org Message-ID: 201001291653.18597.phillor@telstra.com Content-Type: text/plain; charset="us-ascii"
Thank you for reading this.
I'm in the process of setting up my satellite station after a five year break and my UHF aerial doesn't seem to be performing as well as I expect it should. I always suspected that it's performance was below par. AO-51, for instance, is received no better than strength 3 on my FT-847.
The aerial is a twelve element design (twelve elements in each plane) by DK7ZB and is without a doubt the best 435MHz aerial that I have ever built. The extra twelve elements have been removed for testing purposes and is currently hand held and rotated as accurately as possible.
I suspect that the poor gain might be due to the matching system because I was always unsure of the exact physical length of parallel quarter wave matching cable. The element lengths are spot on and the element spacing is within a millimetre of the design figures. The SWR, even after all this time, is still around 1.2:1. The Belden 9913 cable connecting the aerial to the radio is only nine metres long and, as best I can tell, has a about a half DB loss.
I would like to make e-mail contact with anyone who may have built this aerial or one of the other UHF designs by DK7ZB.
-- Regards, Phil
Message: 11 Date: Fri, 29 Jan 2010 08:49:36 -0500 From: Bob DeVarney W1ICW we1u@myfairpoint.net Subject: [amsat-bb] updated pseudo moon keps To: amsat-bb@amsat.org, uni_Trac@topica.com Message-ID: 4B62E770.3020009@myfairpoint.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Here is a set of pseudo keps for the moon calculated using the MoonKeps program by HB9BNI ( thank you ! ) to calculate them, and then rewritten in two line form. These work fine for my Uni_Trac 2003 using both the -2003 and the -2000 software. Perhaps they may help someone else with a stand-alone tracker like mine.
Cheers,
Bob W1ICW
MOON 1 00000U 00000A 10019.90529622 .00000000 00000-0 00000-0 0 0004 2 00000 25.1631 348.5977 0637000 142.8591 221.8486 00.036600996 6
Message: 12 Date: Fri, 29 Jan 2010 09:49:10 -0500 From: "Stan, W1LE" stanw1le@verizon.net Subject: [amsat-bb] Re: DK7ZB 435MHz aerial question To: Phil phillor@telstra.com Cc: amsat-bb@amsat.org Message-ID: 4B62F566.6080903@verizon.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello Phil,
One big problem....
ALL elements must be installed to effectively test. The V and H elements do interact, but that interaction is designed around by the designer.
Add the other elements with matching system and retest.
To prove this try modeling the entire element then remove all of the V or H elements.
Stan, W1LE Cape Cod FN41sr
Phil wrote:
Thank you for reading this.
I'm in the process of setting up my satellite station after a five year break and my UHF aerial doesn't seem to be performing as well as I expect it should. I always suspected that it's performance was below par. AO-51, for instance, is received no better than strength 3 on my FT-847.
The aerial is a twelve element design (twelve elements in each plane) by DK7ZB and is without a doubt the best 435MHz aerial that I have ever built. The extra twelve elements have been removed for testing purposes and is currently hand held and rotated as accurately as possible.
I suspect that the poor gain might be due to the matching system because I was always unsure of the exact physical length of parallel quarter wave matching cable. The element lengths are spot on and the element spacing is within a millimetre of the design figures. The SWR, even after all this time, is still around 1.2:1. The Belden 9913 cable connecting the aerial to the radio is only nine metres long and, as best I can tell, has a about a half DB loss.
I would like to make e-mail contact with anyone who may have built this aerial or one of the other UHF designs by DK7ZB.
Message: 13 Date: Fri, 29 Jan 2010 10:59:23 -0500 From: claryco@aol.com Subject: [amsat-bb] ND9M Road Trip Update #3 To: amsat-bb@amsat.org Message-ID: 8CC6F1328B96CAF-59D0-D12E@webmail-m082.sysops.aol.com Content-Type: text/plain; charset="us-ascii"
Yesterday's snowfall in SW Kansas complicated road conditions and especially safety so I opted to hold off getting to the DM98/EM08 line until today (Friday). I'll operate from that line during the AO27 pass that starts at about 29/1950Z. Depending on accessibiltiy, I may get to the quad grid point and add DM99/EM09.
From there, we'll head north to Nebraska and put out DM99/EM09 during the AO51 pass at 2236Z and then either put out the DN90/EN00 grid line or the DM99/EM09/DN90/EN09 quad field point on the AO51 pass starting at 30/0014Z.
We have to focus on getting to Denver now, so time permitting, Saturday's game plan will be to hit the DN91/EN01 line on AO27 at 30/1922Z, stop again in DN91 for the second AO27 pass at 2101Z, and then the DN80/DN81 grid line on AO51 at 30/2335.
After that, we'll be in Denver (DN70) and Cheyenne (DN71) with family for a few days before heading south through NM and into TX.
73 for now,
Jim, ND9M / VQ9JC Wekeeney, KS / EM09
Message: 14 Date: Fri, 29 Jan 2010 16:50:44 +0000 (UTC) From: w6zkh@comcast.net Subject: [amsat-bb] More great FO-29 passes To: amsat-bb amsat-bb@amsat.org Message-ID:
<1354380632.1292461264783844056. JavaMail.root@sz0155a.westchester.pa.mail.comcast.net>
Content-Type: text/plain; charset=utf-8
It sure is nice to have FO-29 back online, after being off for awhile. The 0415 utc 2/29 pass provided my first QSO with VE4AMU and this last pass of 1602 utc provided a contact with Larry, WA6DIR. This last pass was out over the Pacific. (I missed the 1416 utc pass; was still in bed). I hope it stays active, but do know it is in a test phase.
John W6ZKH
Message: 15 Date: Fri, 29 Jan 2010 09:39:54 -0800 From: "Jim" hartwell@hartwell.net Subject: [amsat-bb] UX-14 To: AMSAT-BB@amsat.org Message-ID: 000601caa10a$1226d480$36747d80$@net Content-Type: text/plain; charset="us-ascii"
Hi all
I am looking for a ICOM UX-14 interface board.
TNX
Jim
K7UDG
Hartwell@hartwell.net
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End of AMSAT-BB Digest, Vol 5, Issue 54