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HITSAT FM recorded
by Mineo Wakita 28 Sep '06

28 Sep '06

Today, 09:00 UTC, 28 Sep 2006, I recorded the HITSAT FM sounds on 437.425 MHz. These signals were switched on ONLY in the range of Japan. And these 1k2 AFSK (FM 437.425 MHz) be able to decode by modem of IC FX614, becauce NOT AX.25 (not NRZ-NRZI). http://www.ne.jp/asahi/hamradio/je9pel/60928hit.wav --------------------------------------------- Name: Mineo Wakita / JE9PEL, JAMSAT member Mail: ei7m-wkt(a)asahi-net.or.jp URL : http://www.ne.jp/asahi/hamradio/je9pel/ QTH : Yokohama Japan, GL:pm95tj Date: Sep 28, 2006 ---------------------------------------------

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Antennas IOio and CJU for VHF/UHF Satellite Mobile Operation
by i8cvs 28 Sep '06

28 Sep '06

Hi Rick, N1HID I have sent to you the requested drawings and information about the antennas IOio and CJU Unfortunately my message sent to n1hid(a)comcast.net failed and bounced back Do you have another email address to try again ? 73" de i8CVS Domenico

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Fw: 23 cm Loop feed
by kc6uqh 28 Sep '06

28 Sep '06

Here is a modification to a standard conifer type 2.4 GHz grill antenna. The loop gives it a feed for L Band used here to receive ATV 1.253 GHz while transmitting on 2.441 GHz. Filters are required on both bands to reduce white noise from the Xmit PA and leep power out of the receive preamp. Those interested in Pictures request via E-Mail and I will forward them. Art, KC6UQH Subject: 23 cm Loop feed Dave, Ted and Gary, Here are some pictures. #1, & #2 show the feed mounted on the dish from both sides, #3 shows the Split Feed balun. Clamp tight one end 12" length of # 12Ga house wire in shop vise, pull hard until straight, then strip off insulation with a box cutter. The loop is 2.64 " square center to center, formed from the # 12 hard drawn house wire with the insulation removed. Using a 3" length of 1/8 " copper hobbie tubing, cut two .025" wide slots one on each side for 2.4 " long. Trim back the braid 2.9 " on a piece of R/G 142, Strip 0.2" of the center dielectric from the end of the cable. Slide the copper tube on to the coax unsplit end first, fan out the braid, and bend over the center conductor and solder to one of the split ends, Each side of the loop connects to a split end of the tubbing. Silde a piece of 1/4" heat shrink tubbing over the copper tubbing and solder the braid to the unsplit end You can also solder a bracket to this end to support the cable, and in the center of the opposite side use a piece of acrylic plastic 1/16 thick, heated and bent to support the other side of the loop. After connecting the loop, shrink the tubbing and coat the matching section and connections with liquid electrical tape or yellow weatherstrip adhesive. Cable is then wire tied to the boom. The loop is 2.75 " from the center of the reflector where it is screwed to the 2.4 GHz antenna cover. This is a living document and comments about omissions, changes etc are welcome in the intrerest of maintaining an accurate documentation. Art, KC6UQH

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L Band Uplink Ant
by sco＠sco-inc.com 28 Sep '06

28 Sep '06

What do most folks use for a L Band uplink antenna? Les W4SCO

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Re: L Band Uplink Ant
by Wayne Estes 28 Sep '06

28 Sep '06

Ed Cole wrote: That being said, there is the benefit of using it [4-foot dish] as a dual-band antenna on 1268/2401. Wayne replies: AND it has right hand circular polarization to minimize fading. Wayne Estes W9AE Oakland, Oregon, USA, CN83ik

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Primestar L Band
by w7lrd＠comcast.net 28 Sep '06

28 Sep '06

Hello How much gain can I expect to get from a 36x30 inch primestar dish. Also a 54X48 ps dish? I plan to use a 5-6 turn helix feed. I've been googleling around and I can't find out. I have some 7/8 hardline I'll use from my IC-1271A running 10 watts. 73 Bob W7LRD Seattle

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L Band Uplink Ant
by Wayne Estes 28 Sep '06

28 Sep '06

Les W4SCO What do most folks use for a L Band uplink antenna? Wayne W9AE replies: The Teksharp 4-foot mesh dish kit was popular in the final months of AO-40 operation. Most people used it with a dual band patch feed, so one dish is used for L-band uplink AND S-band downlink. The TranSystem AIDC downconverter from K5GNA worked well in this setup because it doesn't require extra filtering to reject strong L-band TX signals. The 4-foot mesh dish has less wind load than a solid 3-foot dish and more gain than the biggest yagi or loop antenna. Wayne Estes W9AE Oakland, Oregon, USA, CN83ik

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Re: Arrow Antennas
by Tony Langdon 27 Sep '06

27 Sep '06

At 07:03 AM 9/28/2006, Fabio Roccatagliata wrote: >Dear OMs, > >I was wondering if arrow antennas are the only portable antennas >available on ham shops or other similar products are/were available. > >Any other suggestion for a simple V/U portable antenna to use for >handheld or portable operations ? Plenty of home brew designs that can be built cheaply for a couple of hours work. That's the approach I ended up using. 73 de VK3JED http://vkradio.com

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Florida AMSAT Net
by David J 27 Sep '06

27 Sep '06

The Florida AMSAT Net will meet this Thursday evening at the usual time of 19:30 ET, 23:30 UTC on the West Florida Group Ni4CE repeater system, the Orlando N4HHA repeater at 443.1 MHz, 103.5Hz tone, the N4LEM Cocoa repeater, 147.36 MHz +107.2 PL or connect by echolink to KG4YZY-R. The net's purpose is to provide a platform for hams with amateur satellite interest to meet and discuss topics of interest. All amateurs are invited to check in. K04MA will be the net control for this session. Dave, AA4KN

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Re: L Band Uplink Ant
by Wayne Estes 27 Sep '06

27 Sep '06

John Wilcox / NS1Z wrote: > I don't think this statement is true. For very low wind speeds you > might be right. However, once the wind reaches a certain speed (one > which would exert moderate force) the mesh dish no longer will pass > the wind thru the small openings of the mesh. Due to surface > turbulance etc the mesh dish would appear to be solid and no air would > be passing thru it. Wayne replies: I built my Teksharp 4-foot dish kit with 1/4 inch hardware cloth which is 80-90% holes. Other people estimated that it has about half the windload of a solid dish in a very high wind, which would be slightly less than the wind load of a 3-foot dish. Anecdotally, people have reported that it's still extremely windy when they stand downwind of the dish in a gale force wind. The dish would behave more "solid" in high winds if it was built with window screen or perforated metal instead of hardware cloth. > If the surface holes are larger (than the typical C/Ku dish) then the > air once again can pass thru at a higher wind speed. However, this > limits the dish usefulness since increased diameter surface holes > lower the useable frequency of the dish, something about a waveguide > beyond cutoff. The Teksharp dish isn't intended for higher microwave frequencies because of the 8-petal design isn't a precise parabola. And of course at higher frequencies you would need a finer mesh than 1/4 inch hardware cloth. I wonder if the 4-foot Teksharp 8-petal dish can match the gain of a perfectly shaped 2-foot dish at 5 or 10 GHz? That would still be a lot of gain. Wayne Estes W9AE Oakland, Oregon, USA, CN83ik

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