[amsat-bb] KD8KSN/8 EN90/EM99 Tomorrow (Friday 17)
Hi All! I will be operating portable from the EN90/EM99 gridline tomorrow afternoon from about 1800z-2045z. I know these are not rare grids, but I have spoken with a few of you that need them. I finally got a little break in school, so it sounded like a good time to make a road trip. Here are the passes I am planning to be on: HO68 – 1805z – 8* (This will be a good pass to work some of the far northwestern North American stations) AO27 – 1837z – 73* SO50 – 1850z – 13* AO27 – 2019z – 12* SO50 – 2030z – 81* If this is a new grid(s) for anyone, just send me an email, and as long as you are in the log, I will send you a card. No need for a return card. 73! Zack KD8KSN ___ Sent via amsat...@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] LU6QI Sked?
I received this query in an email from Luis, LU6QI. Perhaps someone is in a position to respond. I am trying to attempt a qso with USA via AO7 or FO29. It could be possible with some station from Florida, Do you know who could be in conditions to make this try? Best 73 de --luis LU6QI ex LU6QI/W9-LQ16DX-LR6QI Happy Holidays! Nick KB1RVT ___ Sent via amsat...@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: LU6QI Sked?
I could try, could you send me his email address? I've worked northern Argentina before on LEOs, and would like to try some of the other countries there as well. 73, Drew KO4MA On 12/16/2010 9:21 AM, Daniel Nick Kucij wrote: I received this query in an email from Luis, LU6QI. Perhaps someone is in a position to respond. I am trying to attempt a qso with USA via AO7 or FO29. It could be possible with some station from Florida, Do you know who could be in conditions to make this try? Best 73 de --luis LU6QI ex LU6QI/W9-LQ16DX-LR6QI Happy Holidays! Nick KB1RVT ___ Sent via amsat...@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...@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: LU6QI Sked?
He's good on QRZ, but here's the email he used when he replied to me: lu6quin...@gmail.com GL Happy Holidays! 73 Nick KB1RVT ___ Sent via amsat...@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] AO-7 Scheduling page
There is a link off of the AO-7 resource page for a logger for scheduling contacts but it doesn't work. Does anybody know of a real time/near time reflector for scheduling more specifically AO-7 contacts or even a general reflector covering all the satellites? Thanks in advance and 73, Scott AA5AM From: kladuke1...@msn.com To: amsat-bb@amsat.org Date: Thu, 16 Dec 2010 11:55:37 -0700 Subject: [amsat-bb] UA0QJ All, Boris, UA0QJ (Asiatic Russia) is active on AO7 mode B. He has been operating CW so far. He lists his qth as PP42TA in the online AO7 log. 73 WC7V Kerry ___ Sent via amsat...@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...@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] Horizontal stacking distance question
I know that when stacking antennas for different bands on the same mast, the general rule of thumb is to space them at least 1/2 of the boom length for the higher frequency antenna. Does this rule also hold true for stacking 2 antennas on a horizontal crossboom? If I want to put a 2m and 70cm yagi on the same crossboom, how far apart should they be spaced? 73s John AA5JG ___ Sent via amsat...@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: Will the FTM-350AR do full-duplex?
No, not what WE call a full-duplex radio. But you can monitor the FMN broadcast band ion the left side, and have a ham freq on the right side. Clint, K6LCS ___ Sent via amsat...@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] Educate the Manufacturers
... but Kenyeacomco Model XYZ-123 claims it is full-duplex ... Several of us have tried for years to properly educate the manufacturers and marketing departments of ham radio transceivers. What they term full-duplex is usually a radio with two, independent VFOs - but the sub-band can NOT be monitored while we key up on the other. Clint, K6LCS http://www.work-sat.com ___ Sent via amsat...@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: Will the FTM-350AR do full-duplex?
He asked, if it would do V/U or U/V full duplex, and yes, it most certainly does. On Thu, Dec 16, 2010 at 1:56 PM, Clint Bradford clintbra...@earthlink.netwrote: No, not what WE call a full-duplex radio. But you can monitor the FMN broadcast band ion the left side, and have a ham freq on the right side. Clint, K6LCS ___ Sent via amsat...@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...@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] AO7 Post Script
Few more comments: Running 50w into the Lindy works the middle of the pass, OK on AO7-mode A. I need my 8-element 2m yagi to do better. Since the support tower is out of commission until spring, I could move the B5400 and 2m/70cm antennas to a tripod mounted mast that I have used temporarily when roving or other things. I could mount the UHF part of the Arrow and the 8-element M2 2m yagi for a low impact set up that would probably still work mode O/V and mode-A OK. I will think about setting this up in the next couple weeks. This would resemble my old satellite setup at the old house on the flat roof (in a minimalist fashion). I will not set up the 1268 loop-yagi or 33-inch dish (KISS). I could set up the 2.4GHz panel antenna with LNA and drake converter. I'm back! 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 == *temp not in service ___ Sent via amsat...@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] Virgin Galactic's Plans For Orbital Spacecraft
http://spaceflightnow.com/news/n1012/16virgingalactic/ 73s Bernhard VA6BMJ @ DO33FL ___ Sent via amsat...@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] LVB Tracker
LVB Tracker with KR-5400A Controller. EEPROM does not hold calibration after Controller is turned off for a while. Do I have to go thru the calibration procedure every time it is turned on? Am I missing something here? 73, Harvey K5HV ___ Sent via amsat...@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: Educate the Manufacturers
Spot on. It has to be full duplex for cross band repeat to work, whether the guys who write the manual, marketing literature, or QST review realize it. That's correct, except that the radio doesn't need to be able to use the mic or speaker while in crossband receive mode, so it is theoretically possible to have a crossband repeat capable radio without being able to make use of the duplex capability otherwise. I believe this is the operative statement. I haven't tried it in a while (years), but I recall that my Alinco DR-610T mobile rig was not able to receive on 70cm while I was keyed up on 2m for a satellite contact. I remember this because it's frustrating when you can't hear what's going on. Haven't tried V/U satellite mobile since (and that was while parked in my driveway). The DR-610T is definitely capable of Cross-band Repeat, however. Greg KO6TH ___ Sent via amsat...@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: Educate the Manufacturers
On 12/17/2010 12:09 AM, Greg D. wrote: I believe this is the operative statement. I haven't tried it in a while (years), but I recall that my Alinco DR-610T mobile rig was not able to receive on 70cm while I was keyed up on 2m for a satellite contact. I remember this because it's frustrating when you can't hear what's going on. Haven't tried V/U satellite mobile since (and that was while parked in my driveway). The DR-610T is definitely capable of Cross-band Repeat, however. Greg KO6TH The 610 was definitely full duplex; see the second bullet at http://www.alinco.com/Products/DR-610T.shtml. I used a 605 extensively on satellite, and a friend has a 610 still. Just think about how a cross band repeater works, and you'll realize that any radio that does that must by design be capable of full duplex. 73, Drew KO4MA ___ Sent via amsat...@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: [VHF] Horizontal stacking distance question
Hi John. That old rule of thumb does not apply for modern antennas (and never did except for fairly short antennas). You need to know the aperture size of the antenna, and stack them at half of that measurement - for maximum gain, but somewhat closer if you are interested in a better pattern (less side lobes), at the expense of some gain. Most modern antenna manufacturers have done this for you and will specify the horizontal and vertical stacking distances. You can also look up the antenna lists maintained by VE7BQH and it shows the stacking information for most antennas. There are other sources on the web as well. Generally the stacking distance will be wider than it is high. IIRC the difference is about 1 foot for my ~4 wavelength 2 meter antennas. The above information is for stacking two identical antennas. For stacking different band antennas, to completely avoid interference between them, the stacking distance should be the same as for the antenna with the larger aperture (normally the lowest band). However if you need to stack them closer, be aware that the greatest interference will be to the lower frequency antenna. The higher band antenna will not be affected until the lower antenna is close enough to be inside of it's aperture. Basically you can think of aperture as a three dimensional oval shape that surrounds the antenna. The idea is to keep other objects outside of that oval as much as possible. All the above said, the major problem with too close spacing is pattern distortion - not gain reduction. So if you have to stack closer, don't be afraid to do so - the antennas will still work reasonably well unless you are working EME with them. 73, Russ K2TXB -Original Message- From: owner-...@w6yx.stanford.edu [mailto:owner-...@w6yx.stanford.edu] On Behalf Of John Geiger Sent: Thursday, December 16, 2010 3:21 PM To: v...@w6yx.stanford.edu; amsat-bb@amsat.org Subject: [VHF] Horizontal stacking distance question I know that when stacking antennas for different bands on the same mast, the general rule of thumb is to space them at least 1/2 of the boom length for the higher frequency antenna. Does this rule also hold true for stacking 2 antennas on a horizontal crossboom? If I want to put a 2m and 70cm yagi on the same crossboom, how far apart should they be spaced? 73s John AA5JG -- Submissions:v...@w6yx.stanford.edu Subscription/removal requests: vhf-requ...@w6yx.stanford.edu Human list administrator: vhf-appro...@w6yx.stanford.edu List rules and information: http://www-w6yx.stanford.edu/vhf/ ___ Sent via amsat...@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: FTM-350 - Semantics
... It cross-band repeats, which means it will receive on on band while transmitting on the other, doesn't it? But the AMSAT mantra for working the FM birds has been work 'em full duplex, so you can monitor the downlink as you transmit. Being able to cross-band repeat does not necessarily include the ability to monitor the downlink on one band while keying up an another band. Clint ___ Sent via amsat...@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: [VHF] Horizontal stacking distance question
Hi again John and all. Sorry, I made an error in my description. For minimum interference (or max gain) you need to stack so the apertures just 'touch'. So for two identical antennas, if the aperture is 9 feet then the 'edge' of that aperture is 1/2 the aperture diameter, or 4.5 feet. That was what I was thinking of - but of course the other antenna also needs 4.5 feet, so the correct stacking distance is the actual diameter of the aperture of a single one (or 9 feet in this example). In the case of two different band antennas, then the best stacking distance would be 1/2 the aperture of the smaller antenna plus 1/2 the aperture of the larger one. Regarding the experiments carried out by Kent Britian, I have not discussed it with him or heard his presentation. I am fairly sure he is right when you do not take into account the pattern distortion. So if your objective is to work fairly strong signals, and if you are in a quiet environment, then very close stacking will work OK. But if you are trying to hear very weak signals and you have significant man made noise to reject, then you need as tight a pattern from your array as you can get. In that case close stacking will create all kinds of what are called 'grating lobes', that will pick up noise from random directions and mask those weak signals. It is particularly bad for EME because you are pointed up, where there is no (or a lot less) noise, but those grating lobes still pick up noise from your neighbors house, electric poles and wires, etc. Thanks to Alan Larson, WA6AZP for catching my error. 73, Russ K2TXB -Original Message- From: owner-...@w6yx.stanford.edu [mailto:owner-...@w6yx.stanford.edu] On Behalf Of Russ Pillsbury Sent: Thursday, December 16, 2010 3:54 PM To: 'John Geiger'; v...@w6yx.stanford.edu; amsat-bb@amsat.org Subject: RE: [VHF] Horizontal stacking distance question Hi John. That old rule of thumb does not apply for modern antennas (and never did except for fairly short antennas). You need to know the aperture size of the antenna, and stack them at half of that measurement - for maximum gain, but somewhat closer if you are interested in a better pattern (less side lobes), at the expense of some gain. Most modern antenna manufacturers have done this for you and will specify the horizontal and vertical stacking distances. You can also look up the antenna lists maintained by VE7BQH and it shows the stacking information for most antennas. There are other sources on the web as well. Generally the stacking distance will be wider than it is high. IIRC the difference is about 1 foot for my ~4 wavelength 2 meter antennas. The above information is for stacking two identical antennas. For stacking different band antennas, to completely avoid interference between them, the stacking distance should be the same as for the antenna with the larger aperture (normally the lowest band). However if you need to stack them closer, be aware that the greatest interference will be to the lower frequency antenna. The higher band antenna will not be affected until the lower antenna is close enough to be inside of it's aperture. Basically you can think of aperture as a three dimensional oval shape that surrounds the antenna. The idea is to keep other objects outside of that oval as much as possible. All the above said, the major problem with too close spacing is pattern distortion - not gain reduction. So if you have to stack closer, don't be afraid to do so - the antennas will still work reasonably well unless you are working EME with them. 73, Russ K2TXB -Original Message- From: owner-...@w6yx.stanford.edu [mailto:owner-...@w6yx.stanford.edu] On Behalf Of John Geiger Sent: Thursday, December 16, 2010 3:21 PM To: v...@w6yx.stanford.edu; amsat-bb@amsat.org Subject: [VHF] Horizontal stacking distance question I know that when stacking antennas for different bands on the same mast, the general rule of thumb is to space them at least 1/2 of the boom length for the higher frequency antenna. Does this rule also hold true for stacking 2 antennas on a horizontal crossboom? If I want to put a 2m and 70cm yagi on the same crossboom, how far apart should they be spaced? 73s John AA5JG -- Submissions:v...@w6yx.stanford.edu Subscription/removal requests: vhf-requ...@w6yx.stanford.edu Human list administrator: vhf-appro...@w6yx.stanford.edu List rules and information: http://www-w6yx.stanford.edu/vhf/ -- Submissions:v...@w6yx.stanford.edu Subscription/removal requests: vhf-requ...@w6yx.stanford.edu Human list administrator: vhf-appro...@w6yx.stanford.edu List rules and information: http://www-w6yx.stanford.edu/vhf/ ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not
[amsat-bb] Re: [VHF] Horizontal stacking distance question
This might give some insight John http://www.directivesystems.com/STACKING.htm It would be better if the other antenna was anything but 432. Carl - Original Message - From: John Geiger aa...@fidmail.com To: v...@w6yx.stanford.edu; amsat-bb@amsat.org Sent: Thursday, December 16, 2010 3:21 PM Subject: [VHF] Horizontal stacking distance question I know that when stacking antennas for different bands on the same mast, the general rule of thumb is to space them at least 1/2 of the boom length for the higher frequency antenna. Does this rule also hold true for stacking 2 antennas on a horizontal crossboom? If I want to put a 2m and 70cm yagi on the same crossboom, how far apart should they be spaced? 73s John AA5JG -- Submissions:v...@w6yx.stanford.edu Subscription/removal requests: vhf-requ...@w6yx.stanford.edu Human list administrator: vhf-appro...@w6yx.stanford.edu List rules and information: http://www-w6yx.stanford.edu/vhf/ ___ Sent via amsat...@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: Educate the Manufacturers
Date: Fri, 17 Dec 2010 00:40:56 -0500 From: glasbren...@mindspring.com To: ko6th_g...@hotmail.com CC: vk3...@gmail.com; m5...@yahoo.co.uk; amsat-bb@amsat.org Subject: Re: [amsat-bb] Re: Educate the Manufacturers On 12/17/2010 12:09 AM, Greg D. wrote: I believe this is the operative statement. I haven't tried it in a while (years), but I recall that my Alinco DR-610T mobile rig was not able to receive on 70cm while I was keyed up on 2m for a satellite contact. I remember this because it's frustrating when you can't hear what's going on. Haven't tried V/U satellite mobile since (and that was while parked in my driveway). The DR-610T is definitely capable of Cross-band Repeat, however. Greg KO6TH The 610 was definitely full duplex; see the second bullet at http://www.alinco.com/Products/DR-610T.shtml. I used a 605 extensively on satellite, and a friend has a 610 still. Just think about how a cross band repeater works, and you'll realize that any radio that does that must by design be capable of full duplex. 73, Drew KO4MA Hi Drew, Well, I need to try it again, then, because I definitely recall that the operation was difficult. Have you or anyone had problems with desense? Maybe that was it. I was using the mobile setup, with the radio and a Larsen 2/70 glass-mount antenna. I think I was trying AO-27 at the time. Greg KO6TH ___ Sent via amsat...@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
