January 2009 - AMSAT-BB - mailman.amsat.org

How is ISS currently configured?
by Mike Ryan 22 Jan '09

22 Jan '09

Heard lots of stations on 145.800 on the 04:10 UTC pass her ein the East US, but couldnt figure out what the uplink was. Looked at http://www.ariss.org and found no hints. Any help? Mike WB1AAT

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IC-910H For Sale
by John Henderson N4NAB 22 Jan '09

22 Jan '09

Like new 10 out of 10 IC-910H with UX-910 1.2Ghz board. Six months old but must sell. All boxes, manuals and original accessories. Current price at HRO for combo is $1940. Best offer....Pictures on request. John John Henderson N4NAB 212 Bayside Drive Cape Carteret, NC 28584

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Re: springtime project
by Jim Jerzycke 22 Jan '09

22 Jan '09

The sep kit that I have consists of some studs that go into the el rotor housing where the bracket was, and some nuts and "muffler clamps" (like 1/2 a u-bolt and clamp) that clamp the rotor housing to the side of the mast. The bottom end of the mast goes into a regular mast mount clamp (GC-038?) turned "upside down", and installed on the top of the az rotor. You could use two of these to mast-mount the az rotor, and then put a mast on the top. I use the sep kit with a G-5500 and an 8' Glen Martin tower. The az rotor goes on the tower shelf, and the mast goes up through the top of the tower and thrust bearing, and I have the el rotor about 6' above the thrust bearing. This gives me enough room to do a full 180 elevation flip with my antennas, and still clear the ground. I'm going to mount the whole shebang on a little Harbor Freight trailer this year, and tow it down to our Field Day site. Should be much easier than building everything up "from scratch" each year! 73, Jim --- On Wed, 1/21/09, Doug Faunt N6TQS +1-510-655-8604 <faunt(a)panix.com> wrote: > From: Doug Faunt N6TQS +1-510-655-8604 <faunt(a)panix.com> > Subject: Re: [amsat-bb] Re: springtime project > To: kq6ea(a)pacbell.net > Date: Wednesday, January 21, 2009, 5:31 PM > Really! The ones I've seen from Yeasu top-mounted the > elevation > rotator. > > 73, doug > > Date: Wed, 21 Jan 2009 17:26:10 -0800 (PST) > From: Jim Jerzycke <kq6ea(a)pacbell.net> > > Well, the one I have mounts the rotor to the *side* of > the mast. If you put enough mast through it, I suppose you > could mount another antenna on top, but I'd get worried > about the bending moment with something big on top. > > > --- On Wed, 1/21/09, Doug Faunt N6TQS +1-510-655-8604 > <faunt(a)panix.com> wrote: > > > From: Doug Faunt N6TQS +1-510-655-8604 > <faunt(a)panix.com> > > Subject: Re: [amsat-bb] Re: springtime project > > To: kq6ea(a)pacbell.net > > Date: Wednesday, January 21, 2009, 5:00 PM > > Ah, but that separation kit mounts the elevation > rotator on > > top of the > > mast, so if you want to mount an antenna above it, > you > > still need > > something custom. It's not that hard to do, > it's > > just that having an > > antenna above the satellite antennas can cause a > problem > > either > > because of physical or electrical obstruction. > > > > 73, doug > > > > Date: Wed, 21 Jan 2009 16:37:08 -0800 (PST) > > From: Jim Jerzycke <kq6ea(a)pacbell.net> > > > > You can also get a separation kit from Yaesu > that lets > > you mount the rotors apart. I've got one and it > works > > fine. > > Jim KQ6EA > > > > > > --- On Wed, 1/21/09, George Henry > <ka3hsw(a)att.net> > > wrote: > > > > > From: George Henry <ka3hsw(a)att.net> > > > Subject: [amsat-bb] Re: springtime project > > > To: "amsat bb" > <amsat-bb(a)amsat.org> > > > Date: Wednesday, January 21, 2009, 4:03 PM > > > ----- Original Message ----- > > > From: "Edward Cole" > > <kl7uw(a)acsalaska.net> > > > To: "George Henry" > <ka3hsw(a)att.net> > > > Sent: Tuesday, January 20, 2009 11:37 PM > > > Subject: Re: [amsat-bb] Re: springtime > project > > > > > > > > > [snip] > > > > > > > > You can separate the elevation section > from > > the > > > azimuth section of > > > > the B5400. Then you attach the > elevation > > section to > > > the side of the > > > > mast with a custom-made bracket. > > > > > > > > 73, Ed - KL7UW > > > > > > > > > > > > Ahhhh.... custom bracket. Shoulda thought > of > > that..... > > > > > > > > > DOH! > > > > > > > _______________________________________________ > > > Sent via AMSAT-BB(a)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 > > _______________________________________________ > > Sent via AMSAT-BB(a)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

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Re: antenna seperation
by Mike Ryan 22 Jan '09

22 Jan '09

A similar and related question. I'm building a 3element 2m and 7element 70cm beam using the Wa5VJB Cheap Yagi design ( I am thinking 1 inch PVC instead of wood). In the original design it puts both on the same boom, the 70cm antenna in front of the 2M. This will make for somewhat a longer boom and I'm hoping for alternatives. I know the Arrow has the antennas interleaved as does the Cushcraft A270 and mfj-1868 but I cant help but think there is interaction between them that I wont have the equipment or expertise to compensate for. I will be mounting horizontal. Instead can I stack them one over the other and if so how far apart? (same question as original poster). Or how about side by side? Will that be less sensitive and how far apart in that case? Mike WB1AAT ----- Angus angus at young5769.freeserve.co.uk Sun Jan 18 01:39:01 PST 2009 a.. Previous message: [amsat-bb] Re: az/el rotor for sale b.. Next message: [amsat-bb] ISS orbital timing & links c.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] -------------------------------------------------------------------------------- Hi all, perhaps what appears to be a simple question but how far apart do I need to space a 6 ele X yagi for 2mtrs (1 wavelength long) and a pair of 12 ele X for 70cms (horizontally spaced and 3 wavelengths long each). The antennas are all homebrew and I know that as far apart as possible is the best solution BUT this is not possible so just how far should I be looking for as a minimum? I am trying to make sure that the de-sensing of any other radio equipment is kept to a minimum (no fancy rigs here, an old FT817 for 70cms and a FT-480r with a 25 watt linear when needed). regards Gus M0IKB -- I am using the free version of SPAMfighter. We are a community of 5.8 million users fighting spam. SPAMfighter has removed 7796 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message

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Re: springtime project
by George Henry 22 Jan '09

22 Jan '09

----- Original Message ----- From: "Edward Cole" <kl7uw(a)acsalaska.net> To: "George Henry" <ka3hsw(a)att.net> Sent: Tuesday, January 20, 2009 11:37 PM Subject: Re: [amsat-bb] Re: springtime project [snip] > > You can separate the elevation section from the azimuth section of > the B5400. Then you attach the elevation section to the side of the > mast with a custom-made bracket. > > 73, Ed - KL7UW Ahhhh.... custom bracket. Shoulda thought of that..... DOH!

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Very-short Antenna experts?
by Robert Bruninga 22 Jan '09

22 Jan '09

Need Antenna experts on very-short, yet broadband antennas. Sorry for off-amsat-topic post, but some research students need: Size: on the order of 3 feet or less Freq: 10 MHz BW: 500 KHz Range: 1 km between like antennas Power: say 10W? We know how to make very short HF antennas, we know how to make broadband antennas, but we don't know how to make very short, very broadband antennas. Looked at some H field claims, but they seemed to be snake-oil salesmen. Bob

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Re: ISS Crew Active!
by w7lrd＠comcast.net 21 Jan '09

21 Jan '09

Sebastian It never gets old!! 73 Bob W7LRD -- "if this were easy, everyone would be doing it" -------------- Original message -------------- From: Sebastian <w4as(a)miamisky.com> > What a thrill to announce my call while I was just getting into the > footprint of the ISS, and getting a response from Mike - NA1SS, of the > crew of the Shuttle! > > At first I didn't hear anyone, it was quiet, but I heard my downlink > stronger than usual, and all of a sudden, I heard "W4AS this is Mike > NA1SS of the International Space Shuttle". I think my first words > were, are you really in the shuttle? > > He went on and worked a few more stations, he didn't seem to be in a > hurry, and we actually had a bit of a rag chew, but at 4:30 pm eastern > time, I guess there weren't too many hams trying to hear the ISS. > > Just wanted to put this up here, so others can be aware that they are > active on the 'repeater' 70cm up and 2 meters down. > > At one point the signal was 60 db over S9, I should have turned my > preamp off to see what the actual reading was. > > If anyone recorded the pass I would love to have it. Guess I should > start to record them from now on. > > > 73 de W4AS > Sebastian > > > > > > > _______________________________________________ > Sent via AMSAT-BB(a)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

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LCU-3 and ICOM 471 or 271
by Dave 21 Jan '09

21 Jan '09

Hi group- Any one have experience with the Hosenose LCU-3 interface to IC-471 or IC-271 ? I'm thinking of using it with SatPC32. Any advice? Thanks, Dave/KA0SWT

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ISS Crew Active!
by Sebastian 21 Jan '09

21 Jan '09

What a thrill to announce my call while I was just getting into the footprint of the ISS, and getting a response from Mike - NA1SS, of the crew of the Shuttle! At first I didn't hear anyone, it was quiet, but I heard my downlink stronger than usual, and all of a sudden, I heard "W4AS this is Mike NA1SS of the International Space Shuttle". I think my first words were, are you really in the shuttle? He went on and worked a few more stations, he didn't seem to be in a hurry, and we actually had a bit of a rag chew, but at 4:30 pm eastern time, I guess there weren't too many hams trying to hear the ISS. Just wanted to put this up here, so others can be aware that they are active on the 'repeater' 70cm up and 2 meters down. At one point the signal was 60 db over S9, I should have turned my preamp off to see what the actual reading was. If anyone recorded the pass I would love to have it. Guess I should start to record them from now on. 73 de W4AS Sebastian

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Re: antenna separation
by Henk, PA3GUO 21 Jan '09

21 Jan '09

Hi Gus, I do not have the answer on which distance to apply really. Just to share my experience: - here at home I never have had any issue with de-sensing and I do not use any filter or trick. with any of the radios (ts2000, ft817, thd7) it all works fine. - field operations: I use no desensing filters either. 145mhz antenna straight to the ft817 435mhz antenna straight to the thd7 antennas clambed together on eachother ... well, in this set-up it makes a BIG difference how I align the antennas. Moving one forward 1 cm does make a big difference. (sliding the booms across eachother) so not the boom2boom but element to element distance. but that is applicable for arrow like setup, not for permanent mounted constructions. Mmm, I am afraid this information doesnt help you at all :-) Henk

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