[amsat-bb] Re: JPL Tour
At 08:10 PM 3/22/2011, Clint Bradford wrote: Just got back home from a day at Pasadena's JPL ... un-edited, no-captions-yet photos at ... http://tinyurl.com/JPL-042211 Clint deja vu for me. I worked there 1976-1979. Of course lots has changed. I tried to get a tour in Sept. 2001 but they were locked-down after 9-11. I did get a tour of Goldstone, but only because I wrote that I was coming, in advance, and because I used to work there 1971-1976. The gal that gave the tour was one of the trainees that took the program (in 1978) that I established in 1974. That was special. 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.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
[amsat-bb] OOPS
Sorry did not mean to send that to everyone... KF7MYK ___ 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
[amsat-bb] Re: OOPS
Send what to everyone? On 23-Mar-11 08:31, Kevin Deane wrote: Sorry did not mean to send that to everyone... KF7MYK ___ 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 -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. ___ 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
[amsat-bb] Cushcraft 416-TB
Hello All I acquired a Cushcraft 416-Tb antenna,the so called phasing harness was in bad shape,so I am going to make a new one for it. I could copy the original one,but yes I am making it hard on myself and decide to calculate the proper cable type and length,and to do that I need to know how the antenna actually works.Here is my problem ,the 2 driven elements have a balun to each of the Tmatchs to make the impedance 50 ohms on each driven element.The original phasing harness is 2 piece of 75 ohm aprox 13 that goes to each driven element and the a so239 connector on the other end of the harness is the 50 ohm feedline.I originally thought this was a matching stub,but when I do the calculation for the matching stub,should only be aprox 4 to each driven element.Am I missing something here,how are they able to do this,does anyone know this antenna and how it works. Thanks to all who read and respond in advance Howard VE4ISP ___ 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
[amsat-bb] Re: Cushcraft 416-TB
Hello Howard, From the cable length that you measure it looks like 3/4 Lambda instead of 1/4 Lambda which is too short for convenience working. From the electrical point of view it is the same, assuming low loss coax. David 4X1DG - Original Message - From: Howard Kowall To: AMSAT BB Sent: Wednesday, March 23, 2011 3:28 PM Subject: [amsat-bb] Cushcraft 416-TB Hello All I acquired a Cushcraft 416-Tb antenna,the so called phasing harness was in bad shape,so I am going to make a new one for it. I could copy the original one,but yes I am making it hard on myself and decide to calculate the proper cable type and length,and to do that I need to know how the antenna actually works.Here is my problem ,the 2 driven elements have a balun to each of the Tmatchs to make the impedance 50 ohms on each driven element.The original phasing harness is 2 piece of 75 ohm aprox 13 that goes to each driven element and the a so239 connector on the other end of the harness is the 50 ohm feedline.I originally thought this was a matching stub,but when I do the calculation for the matching stub,should only be aprox 4 to each driven element.Am I missing something here,how are they able to do this,does anyone know this antenna and how it works. Thanks to all who read and respond in advance Howard VE4ISP ___ 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 ___ 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
[amsat-bb] Re: Cushcraft 416-TB
Hello David I did think about that also I also though maybe the balun didn't make it 50 ohms but maybe a much high value But when i fed the ver driven element with 50ohm feed line and checked the swr with just a meter it was ok so that ruled that out. I realize the circular porization was done by the physical location of the driven elements, Thanks very much David Howard - Original Message - From: David Greenberg To: Howard Kowall ; AMSAT BB Sent: Wednesday, March 23, 2011 8:50 AM Subject: Re: [amsat-bb] Cushcraft 416-TB Hello Howard, From the cable length that you measure it looks like 3/4 Lambda instead of 1/4 Lambda which is too short for convenience working. From the electrical point of view it is the same, assuming low loss coax. David 4X1DG - Original Message - From: Howard Kowall To: AMSAT BB Sent: Wednesday, March 23, 2011 3:28 PM Subject: [amsat-bb] Cushcraft 416-TB Hello All I acquired a Cushcraft 416-Tb antenna,the so called phasing harness was in bad shape,so I am going to make a new one for it. I could copy the original one,but yes I am making it hard on myself and decide to calculate the proper cable type and length,and to do that I need to know how the antenna actually works.Here is my problem ,the 2 driven elements have a balun to each of the Tmatchs to make the impedance 50 ohms on each driven element.The original phasing harness is 2 piece of 75 ohm aprox 13 that goes to each driven element and the a so239 connector on the other end of the harness is the 50 ohm feedline.I originally thought this was a matching stub,but when I do the calculation for the matching stub,should only be aprox 4 to each driven element.Am I missing something here,how are they able to do this,does anyone know this antenna and how it works. Thanks to all who read and respond in advance Howard VE4ISP ___ 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 ___ 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
[amsat-bb] WD9EWK @ Tucson AZ hamfest and post-hamfest activity on Saturday (26 March)
Hi! I will have an AMSAT table at the Radio Society of Tucson's spring hamfest on Saturday, 26 March 2011. The hamfest will be at the usual spot for hamfests in that city, in the Kino Sports Complex - along Ajo Way, east of I-10 and the baseball stadium (previously Tucson Electric Park, now Kino Veterans Memorial Stadium). There is a map of the area showing the hamfest location available at: http://www.rstclub.org/sites/default/files/HamfestMap11.jpg The hamfest officially starts at 0700 local (1400 UTC), but - as with most hamfests in Arizona - there will be people roaming around an hour or so earlier. WD9EWK will be on several satellite passes throughout the morning for demonstrations from approximately 1300 UTC, including AO-7 passes if it is in mode B (it should be, if the current pattern continues). The hamfest site is in grid DM42me. Depending on how long I stay in the Tucson area after the hamfest, I may make a drive to one of the different boundaries in southeastern Arizona for a few hours to work satellite passes before returning home. I have been to the DM51/DM52 boundary (along US-191, south of I-10 near the town of Sunsites in Cochise County) on the last couple of trips to that area, and it has been almost a year since I last visited the DM52/DM53 boundary (along US-70, northwest of Safford in Graham County). The Arizona/New Mexico state line along I-10 (grid DM52 only) is also a possibility. Whatever direction I go, I should be visible on APRS at (among other places): http://aprs.fi/wd9ewk-9 If you have a preference on which of these boundaries I should visit, please e-mail me directly. I can't guarantee I will honor all requests, and really can't do that given the distances between these points. It helps to know what others might be interested in working. Some have already worked me in all 3 of these locations during my past trips. Whether you work me at the hamfest and/or wherever I go afterwards, I will be happy to confirm any QSOs with QSL cards. There's no need to first send me a card or SASE, just an e-mail with the QSO details. I will take care of sending a card (or cards) out. I will also upload my QSOs to Logbook of the World. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ ___ 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
[amsat-bb] FAST1 heard over Brasil
http://www.qsl.net/py4zbz/satelite.htm#f 73 de Roland. ___ 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
[amsat-bb] Re: Cushcraft 416-TB
Hi Howard ,VE4ISP The Cushcraft 416 TB is a 2x8 elements crossed yagi for 70 cm with the horizontal and vertical elements spaced 1/4 wave lenght in free space over the boom. The dipoles are feed using the T match system wich is a balanced system and the balun is a 50 ohm coax line 1/2 electrical wavelengt used to transform the 200 ohm balanced impedance of the dipole into 50 ohm unbalanced impedance for the feed line. To calculate the lenght of the balun you must multiply 1/2 wavelenght into free space by the velocity factor of the coax cable used. If you use RG-58/CU with velocity factor Vf = 0.66 then each balun is long 22.7 cm or 8.9 including the lug lenght. The original phasing harness is 2 piece of 75 ohm coax cable wich is an odd number of 1/4 electrical wavelenght and in your case the odd number is 3 so that if you use RG-59/CU 75 ohm coax cable with Vf = 0.66 then each 75 ohm line is 34 cm or 13.4 long including the SO239 connector. You can find all data to modify the above antenna in order to get four polarizations H-V-RHCP-LHCP reading the instructions in the following address. http://www.pa3guo.com/cushcraft_416tb.html 73 de i8CVS Domenico - Original Message - From: Howard Kowall hkow...@shaw.ca To: AMSAT BB amsat-bb@amsat.org Sent: Wednesday, March 23, 2011 2:28 PM Subject: [amsat-bb] Cushcraft 416-TB Hello All I acquired a Cushcraft 416-Tb antenna,the so called phasing harness was in bad shape,so I am going to make a new one for it. I could copy the original one,but yes I am making it hard on myself and decide to calculate the proper cable type and length,and to do that I need to know how the antenna actually works.Here is my problem ,the 2 driven elements have a balun to each of the Tmatchs to make the impedance 50 ohms on each driven element.The original phasing harness is 2 piece of 75 ohm aprox 13 that goes to each driven element and the a so239 connector on the other end of the harness is the 50 ohm feedline.I originally thought this was a matching stub,but when I do the calculation for the matching stub,should only be aprox 4 to each driven element.Am I missing something here,how are they able to do this,does anyone know this antenna and how it works. Thanks to all who read and respond in advance Howard VE4ISP ___ 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 ___ 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
[amsat-bb] A few more ND9M/MM Panama Canal Pics
Hi Everyone, For anyone interested, I posted a few more of the photos of Jim ND9M/MM's ship in the Panama Canal at: http://kb5wia.blogspot.com Managed to get photos of the ship in Miraflores, going under the Centennial Bridge, and leaving the canal at Gatun. 73 de Dave KB5WIA / CM88 ___ 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
[amsat-bb] Re: A few more ND9M/MM Panama Canal Pics
Good to know. Just in case he has APRS capabilities we have a couple of digipeaters working on 145.010 MHz. At least two of them should be reachable from the Canal. Regards, Alejandro HP1COO -Original Message- From: David Palmer [mailto:zda...@gmail.com] Sent: Miércoles, 23 de Marzo de 2011 05:41 p.m. To: AMSAT BB Subject: [amsat-bb] A few more ND9M/MM Panama Canal Pics Hi Everyone, For anyone interested, I posted a few more of the photos of Jim ND9M/MM's ship in the Panama Canal at: http://kb5wia.blogspot.com Managed to get photos of the ship in Miraflores, going under the Centennial Bridge, and leaving the canal at Gatun. 73 de Dave KB5WIA / CM88 ___ 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 ___ 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
[amsat-bb] More ND9M/MM Videos
Hi! Here are a couple other videos of Jim’s ship (well, the ship he is on ;-)). The first is Jim’s ship entering the Gatun Locks, and the second is when he is exiting: Gatun Locks 73! Zack KD8KSN ___ 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
[amsat-bb] Re: More ND9M/MM Videos
Whoops That link requires a password. Try this one: http://personalspace.sony.net/email/share/794e6244306d706c5a4764696d3279615a5a466d6170755a6c673d3d,first?rd=9612267#i0 Make sure you get it all. Let me know if you experience issues with that one. Zack KD8KSN From: Zachary Beougher Sent: Wednesday, March 23, 2011 8:19 PM To: amsat-bb@amsat.org Cc: Zachary Beougher Subject: More ND9M/MM Videos Hi! Here are a couple other videos of Jim’s ship (well, the ship he is on ;-)). The first is Jim’s ship entering the Gatun Locks, and the second is when he is exiting: Gatun Locks 73! Zack KD8KSN ___ 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
[amsat-bb] DX spots and old idea
I was looking at the cluster tonight and noticed where LU6QI had spotted ND9M, then I spotted him on a later pass. It made me think it might be fun to pick a pass of say FO-29, and originate a message from say the Mideast, which gets passed to Europe, then to the northeast US, then say Florida ;-), then to Central America, then to South America. Sort of like the parlor game where you pass a secret around the room. Yes I realize this is traffic handling, and some folks do it all the time on HF, but for some reason it amused me the idea of leapfrogging along the ground track of a bird. It's sort of what we have done with the AO-51 Sputnik and Apollo events, only two way. I'm sure someone will be right along to tear it to shreds. 73, Drew KO4MA ___ 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
[amsat-bb] ND9M/MM Op Sked: 24 March
Many tks to everyone who sent screen captures and video clips of my ship transiting the Panama Canal today. Although I've been sailing for a long time, this was my first time through the canal and a very exciting day for me. (Remember when this area was KZ5, now a deleted DXCC country?) Plus I was able to put a couple new grid squares into a bunch of logs to boot, so win-win! I operated the FO29 pass at 23/2126Z and AO51 pass a few minutes later from the middle lock at Gatun Locks in FJ09; the ship was literally going down at the time, but only by virtue of the water level being lowered as we approached the Atlantic side of the canal. We've since cleared the canal and are now fully into the Caribbean. Our route to Jacksonville will be around the western end of Cuba so that we can pick up the Gulf Stream near the Florida Keys; the Stream will push us along by adding about 15 percent to our speed. Since we're on a fixed ETA, we'll ease back on the engines a bit so that they don't have to work quite as hard, not to mention not burn as much fuel. We're due into Jacksonville next Tuesday, 29/3. On an unrelated note, congrats to Allen, N5AFV on making his 50,000th satellite contact early this morning; that's quite an accomplishment! Our course over the next 24 hours will be almost due north, so we'll cross into a new grid square about every five hours. Here's my planned op sked for tonight and tomorrow: Planned VO52 - 24/0208Z - FK00 - only pass this grid FO29 - 24/0904Z - FK01 AO51 - 24/0951Z - FK01 FO29 - 24/2216Z - FK04 AO51 - 24/2229Z - FK04 AO7 - 24/2256Z - FK04 VO52 - 25/0052Z FK04 VO52 - 25/0228Z - FK05 - only pass this grid Probable, but not certain AO7 - 24/1216Z - FK02 - probably the only pass this grid AO27 - 24/1916Z - FK03 - Approx turn on time; 3-minute window starting at 16 degrees going down FO29 - 24/2030Z - FK03 or FK04 AO51 - 24/2049Z - FK03 or FK04 ___ 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
