[amsat-bb] Which preamp to buy for 2m?
Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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: Which preamp to buy for 2m?
Hi Tim and group May I suggest that you get a hold on a preamp from SSB-electronics. I myself am using the SP-2000, and I'm happily satisfied with what it does. Wiring is as simple as can be. Power is fed over the coax-line and it can switch via rf-sensing up to about 200W, so if you don't run any big PA's then you should be going with just that. However, I do not know enough about where to buy them outside europe, so can't help you on that one. Hope you could use the information given. Regards Martin, OZ1TMM -Original Message- From: Tim Goodrich t...@timgoodrich.net To: amsat-bb@amsat.org Date: Wed, 12 Oct 2011 23:04:20 -0700 Subject: [amsat-bb] Which preamp to buy for 2m? Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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 [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: Which preamp to buy for 2m?
I use the Advanced Research Preamp on my 440 and 220 repeater, I know it is a Different Application But they are good, I Also included a great link to check on some that may work for you Good Luck 73 De Don KA9QJG http://www.advancedreceiver.com/ http://www.dxzone.com/catalog/Technical_Reference/Preamplifiers/ -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Martin Møller Sent: Thursday, October 13, 2011 1:31 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Which preamp to buy for 2m? Hi Tim and group May I suggest that you get a hold on a preamp from SSB-electronics. I myself am using the SP-2000, and I'm happily satisfied with what it does. Wiring is as simple as can be. Power is fed over the coax-line and it can switch via rf-sensing up to about 200W, so if you don't run any big PA's then you should be going with just that. However, I do not know enough about where to buy them outside europe, so can't help you on that one. Hope you could use the information given. Regards Martin, OZ1TMM -Original Message- From: Tim Goodrich t...@timgoodrich.net To: amsat-bb@amsat.org Date: Wed, 12 Oct 2011 23:04:20 -0700 Subject: [amsat-bb] Which preamp to buy for 2m? Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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] Oscarlocator
Someone on the list was inquiring about an Oscarlocator a while back. Just FYI, one is up on ebay. I'm not the seller, just came across it in one of my searches. http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItemitem=370549993740 Rich, N8UX. ___ 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] SRMVU Telemetry
I was able to copy SRMVU this morning during the 1149UTC pass here at EN91ck (Cleveland, OH USA). I did notice that the AOS/LOS were off by a minute or slightly more. Perhaps the Keps will be updated soon. The signal strength was weak but copyable. A recording was made. The CW Telemetry: SRMVU C Z Z P P C (this was repeated without change throughout the entire pass) -- *Carl W8KRF* ___ 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] HudsonValleySatcomGroupNetTonightOct15@8PMEasternTimeOnEcholinkN@N2EYH-L
Hello all. It is time again for the HVSGN tonight on Echolink N2EYH-L @ 8 PM Eastern or on the MtBeacon ARC repeater 146.970 pl 100. Hope to hear you there. 73 Gary WA2AQH/Tom KC2DTQ ___ 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: Which preamp to buy for 2m?
Tim, I own SSB preamps, the SP-2000 (2 meter) and SP-7000 (70 cm). They have worked very well for me, both on my Icom IC-821 (powered by the radio) and with my FUNcube Dongle (powered with an external bias-T from ARR). The SSB preamps have helical filters on the front end which should help in your Los Angeles RF environment. You have at least four sources for the SSB preamp: 1. Direct from SSB in Germany, www.ssb.de 2. From SSB-Electronics USA, www.ssbusa.com 3. From Array Solutions, www.arraysolutions.com 4. From Universal Radio, www.universal-radio.com 73, Steve N9IP -- -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Tim Goodrich Sent: Thursday, October 13, 2011 2:04 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Which preamp to buy for 2m? Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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] SRMVU Entire Pass Vedio Clip !
Congratulation to SRMVU team for the great succes Without a break to hold a breath ,A continous telemetry received with the same data. Srmvuczzpxc srmvuczzpxc srmvuczzpxcc srmvuczzpxcc srmvuczzpxcc srmvuczzpxcc etc Signal was stable and strong . INHO for such a simple telemetry they had missed to give a break for the transmitter .At least for a period of several seconds . SRMVU entire pass vedio clip see the link http://www.youtube.com/watch?v=FlLt49AMI1c 73's Nader / ST2NH ___ 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: Which preamp to buy for 2m?
First, my sincere apologies...I think I managed to resend the entire digest to the list. I HATE it when people do that but now I know how easy it is to do accidentally. Sorry. Now to what I was going to say: I have the SSB SP-2000 and I'm also very happy with it. It seems to do auto RF switching well down to under 2 watts. (Some auto-switching are only spec'ed to switch down to 8 or 10W). It also bypasses itself if you just cut the power (to be expected, I guess). I'm using it with a second power feedline (which you can connect with a PL259) since I don't happen to have 13.8V phantom power available. On the other hand, it is about the most expensive 2m preamp you can find :-( Where to get it in the US? ssbusa.com appears to be a distributer. No one answered the phone, and they never returned my call. Another vendor (take it from whence it came) said they were phasing out. But in any case, Array Solutions was very helpful and fast and sent me my SP-2000 in a very short time. As I recall I had to talk to them on the phone since they did not have the SSB stuff fully integrated into their web site yet, but it was worthwhile. Array Solutions also advertises in QST :-) Burns, W2BFJ Message: 14 Date: Thu, 13 Oct 2011 10:19:24 -0400 From: Stephen E. Belter s...@wintek.com To: Tim Goodrich t...@timgoodrich.net, amsat-bb@amsat.org amsat-bb@amsat.org Subject: [amsat-bb] Re: Which preamp to buy for 2m? Message-ID: 51668A33220E754EABE6583357ECEE2D79CD61B2@Exchange.wintek.local Content-Type: text/plain; charset=us-ascii Tim, I own SSB preamps, the SP-2000 (2 meter) and SP-7000 (70 cm). They have worked very well for me, both on my Icom IC-821 (powered by the radio) and with my FUNcube Dongle (powered with an external bias-T from ARR). The SSB preamps have helical filters on the front end which should help in your Los Angeles RF environment. You have at least four sources for the SSB preamp: 1. Direct from SSB in Germany, www.ssb.de 2. From SSB-Electronics USA, www.ssbusa.com 3. From Array Solutions, www.arraysolutions.com 4. From Universal Radio, www.universal-radio.com 73, Steve N9IP -- -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Tim Goodrich Sent: Thursday, October 13, 2011 2:04 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Which preamp to buy for 2m? Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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: G5500 Elevation Rotator Short Circuit?
All of the failures were specifically attributed to either a stuck relay in the control box, a manual switch sticking (not releasing) on the front rotor control panel, and a software or computer crash that continued to drive one of the up, down, left, or right control lines. 73, Tim - N8DEU - Original Message - From: Clive Wallis li...@g3cwv.co.uk To: amsat amsat-bb@amsat.org Sent: Sunday, October 09, 2011 11:50 AM Subject: [amsat-bb] Re: G5500 Elevation Rotator Short Circuit? Many thanks Tim for your comments. From what you've said it sounds like a faulty motor. In the ones you've repaired have you been able to determine the cause of motor over heating? The problems I've had in the past have always been due to water getting into the units. 73CliveG3CWV Hitchin, North Hertfordshire, UK On 07/10/2011 18:50, Tim Cunningham wrote: The common failure of the motor windings is caused by heat which causes the enamel coated wire to breakdown. When the enamel breaks down an inner winding short results. I have successfully rewound motor windings on these rotators just to say it could be done, but it takes some work (not recommended). I have never seen one of these motors with an open winding. The failure mode on the 8 that I have repaired were always enamel insulation breakdown as a result of overheating. Tim - N8DEU Sent from my HTC Tilt™ 2, a Windows® Mobile phone -Original Message- From: Clive Wallisamsat...@g3cwv.co.uk Sent: Friday, October 07, 2011 11:35 AM To: amsatamsat-bb@amsat.org Subject: [amsat-bb] G5500 Elevation Rotator Short Circuit? I wonder if this is a known fault. Recently the fuse on my G5500 blew. The problem seems to be a short on one of the motor circuits. Checking the DC resistance at the control end, the resistance of one winding is 1.2 ohms, whereas all the other windings are 4.6 ohms. I could understand a motor burning out and going open circuit, but a short circuit seems less likely. I'm wondering if it could be a short on the cable at the rotator end, where it is subject to much bending. There's about 15 metres of cable. Any thoughts would be much appreciated. Unfortunately, at the present time I'm not able to inspect the rotator. It's stuck in the horizontal position, so I will still be able to use the antenna for low elevation passes. 73 Clive G3CWV Hitchin, North Hertfordshire, UK ___ 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 ___ 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] Tracking program performance post chicken little date. (SatPC32 and GPredict)
All the hype over the chicken little contest caused me to wonder how tracking programs will handle it. I was looked into the Cal Poly CP6 and HAWKSAT1 satellites. The TLE data is published on both Amsat and Celestrack lists. SatPC32 shows neither of the satellites as moving. An error is generated when trying to select either of them. I thought that perhaps they had decayed but had not been removed from the TLE lists. GPredict continues to track Az-El for CP6 in real time in the text display but shows the elevation and altitude as negative and the up/down direction as D (decayed) - it does not display CP6 on the map. I am assuming that CP6 has decayed. The elevation for CP6 goes up and down and the tracking value change over time. Since the elevation is always negative perhaps GPredict is tracking what would have happened if the earth was just a tiny point of mass and the satellite is able to continue its downward descent. HAWKSAT1 shows up as above ground and running in GPredict. Since ARISSAT1 is probably going to decay fairly quickly I took a look at predicting ahead using the great Preview tracking in SatPC32 to see how decay is handled. After a couple of really bad years the coverage map for ARISSAT1 looks better than ever starting just two years from now in 2014. Unfortunately I could not figure out how to get GPredict to predict more than 14 days in the future and did not want to fool around changing the system clock. I have wondered what the NORAD routines would do after decay and how tracking programs that use the NORAD model would deal with it. Does the NORAD model continue to track as if the earth was just a very small very heavy point in space. A transparent 3D earth display would be very interesting to use to view the post chicken little results - someone must have one. Anyone know for sure ? HAWKSAT1 is still a bit of a mystery. 73 W9KE tom ... ___ 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: Tracking program performance post chicken little date. (SatPC32 and GPredict)
Hi Tom. Interesting question. I wonder if running a prediction program forward from a set of 'todays' keps will give a vaild answer for decay date? Looking at the keps, you have a number for decay rate. I reached the conclusion that this could be a major source of inaccuracy as presumably the value for decay rate will change as the satellite reduces altitude. It maybe the case that decay rate follows a curve which is not replicated by the program. Does anyone know if this is correct as it seems unlikely that software available to us e.g. Nova / GPredict will include algorithms for auto changing decay rate or for including other variables like sunspot cycle. I believe these variables are accounted for in more advanced software like AGI Satellite tool kit (STK) Thanks David G0MRF -Original Message- From: Thomas Doyle tomdoyle1...@gmail.com To: amsat-bb amsat-bb@amsat.org Sent: Thu, 13 Oct 2011 23:08 Subject: [amsat-bb] Tracking program performance post chicken little date. (SatPC32 and GPredict) All the hype over the chicken little contest caused me to wonder how tracking programs will handle it. I was looked into the Cal Poly CP6 and HAWKSAT1 satellites. The TLE data is published on both Amsat and Celestrack lists. SatPC32 shows neither of the satellites as moving. An error is generated when trying to select either of them. I thought that perhaps they had decayed but had not been removed from the TLE lists. GPredict continues to track Az-El for CP6 in real time in the text display but shows the elevation and altitude as negative and the up/down direction as D (decayed) - it does not display CP6 on the map. I am assuming that CP6 has decayed. The elevation for CP6 goes up and down and the tracking value change over time. Since the elevation is always negative perhaps GPredict is tracking what would have happened if the earth was just a tiny point of mass and the satellite is able to continue its downward descent. HAWKSAT1 shows up as above ground and running in GPredict. Since ARISSAT1 is probably going to decay fairly quickly I took a look at predicting ahead using the great Preview tracking in SatPC32 to see how decay is handled. After a couple of really bad years the coverage map for ARISSAT1 looks better than ever starting just two years from now in 2014. Unfortunately I could not figure out how to get GPredict to predict more than 14 days in the future and did not want to fool around changing the system clock. I have wondered what the NORAD routines would do after decay and how tracking programs that use the NORAD model would deal with it. Does the NORAD model continue to track as if the earth was just a very small very heavy point in space. A transparent 3D earth display would be very interesting to use to view the post chicken little results - someone must have one. Anyone know for sure ? HAWKSAT1 is still a bit of a mystery. 73 W9KE tom ... ___ 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] Ham Radio Deluxe Sat Tracking Question
I have a strange problem in hrd's satellite tracking program. When I am tracking arissat-1 the satellite name is written on the screen correctly but the voice announcements for aos, los and other alerts call it the international space station. How can I fix the voice alerts? What files if any can I edit to remedy this problem? Other than that odd behavior the program works well. Any information would be appreciated. Dave Marthouse N2AAM dmartho...@gmail.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] Re: Oscarlocator
I may still have one at the bottom of an 18 gallon storage container. -Original Message- From: Joe Sent: Thursday, October 13, 2011 5:40 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Oscarlocator wow thats a fancy one, it's in color! mine was just a black and white line drawing! Joe WB9SBD The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 10/13/2011 3:17 AM, Rich Dailey wrote: Someone on the list was inquiring about an Oscarlocator a while back. Just FYI, one is up on ebay. I'm not the seller, just came across it in one of my searches. http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItemitem=370549993740 Rich, N8UX. ___ 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 ___ 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] Oscarlocator
Anyone want to get rid of one I'll send you a SASE! Kevin 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: Oscarlocator
Take a look at OSCARgraphpredict In: http://cid-1973adc8c1d3207c.skydrive.live.com/summary.aspx?sa=140581470 before we made our own Oscar locators 73, Dave, WB6LLO dguim...@san.rr.com Disagree: I learn Pulling for P3E... ___ 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] Special Event Station K7P
I know is very short notice. I have just put my gear together to operate portable from BO40 tomorrow afternoon and possibly Saturday afternoon as well. I will be in Homer, Alaska for the annual Refuges on the air event. We will be operating on the HF bands as well. We are located at the Alaska Maritime National Wildlife Refuge center. We operated last year from there as KL7YY. This is to celebrate National Wildlife Refuge Week. 73, KL7XJ ___ 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: Special Event Station K7P
I forgot to say that I will be on AO51 passes only with my HT and Arrow ant. Dale KL7XJ On 10/13/2011 4:23 PM, Dale Hershberger wrote: I know is very short notice. I have just put my gear together to operate portable from BO40 tomorrow afternoon and possibly Saturday afternoon as well. I will be in Homer, Alaska for the annual Refuges on the air event. We will be operating on the HF bands as well. We are located at the Alaska Maritime National Wildlife Refuge center. We operated last year from there as KL7YY. This is to celebrate National Wildlife Refuge Week. 73, KL7XJ ___ 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: Oscarlocator
Seeing this kind of enthusiasm for vintage satellite gear might just inspire some enterprising individual to produce some brand new OSCAR Locators. On Thu, Oct 13, 2011 at 6:49 PM, Kevin Deane summit...@live.com wrote: Anyone want to get rid of one I'll send you a SASE! Kevin 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 ___ 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: Special Event Station K7P
I have another correction to make!... The way it goes when it is short notice and trying to coordinate all. The correct grid is BO49 Not BP40. I live in BP40 and we will operate from Homer, AK in grid BO49. Regarding the HF bands, I do not know the specific freqs but I do know we will be on 10,15,17,20 meter bands. 73, Dale,KL7XJ On 10/13/2011 4:23 PM, Dale Hershberger wrote: I know is very short notice. I have just put my gear together to operate portable from BO40 tomorrow afternoon and possibly Saturday afternoon as well. I will be in Homer, Alaska for the annual Refuges on the air event. We will be operating on the HF bands as well. We are located at the Alaska Maritime National Wildlife Refuge center. We operated last year from there as KL7YY. This is to celebrate National Wildlife Refuge Week. 73, KL7XJ ___ 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: Tracking program performance post chicken little date. (SatPC32 and GPredict)
Gents, Gpredict has simple formula based the tle for the decay date. That is starting to appear elsewhere for visualization purposes. The negative altitude is the result of running past where the data is valid. Charles On Oct 13, 2011 6:44 PM, g0...@aol.com wrote: Hi Tom. Interesting question. I wonder if running a prediction program forward from a set of 'todays' keps will give a vaild answer for decay date? Looking at the keps, you have a number for decay rate. I reached the conclusion that this could be a major source of inaccuracy as presumably the value for decay rate will change as the satellite reduces altitude. It maybe the case that decay rate follows a curve which is not replicated by the program. Does anyone know if this is correct as it seems unlikely that software available to us e.g. Nova / GPredict will include algorithms for auto changing decay rate or for including other variables like sunspot cycle. I believe these variables are accounted for in more advanced software like AGI Satellite tool kit (STK) Thanks David G0MRF -Original Message- From: Thomas Doyle tomdoyle1...@gmail.com To: amsat-bb amsat-bb@amsat.org Sent: Thu, 13 Oct 2011 23:08 Subject: [amsat-bb] Tracking program performance post chicken little date. (SatPC32 and GPredict) All the hype over the chicken little contest caused me to wonder how tracking programs will handle it. I was looked into the Cal Poly CP6 and HAWKSAT1 satellites. The TLE data is published on both Amsat and Celestrack lists. SatPC32 shows neither of the satellites as moving. An error is generated when trying to select either of them. I thought that perhaps they had decayed but had not been removed from the TLE lists. GPredict continues to track Az-El for CP6 in real time in the text display but shows the elevation and altitude as negative and the up/down direction as D (decayed) - it does not display CP6 on the map. I am assuming that CP6 has decayed. The elevation for CP6 goes up and down and the tracking value change over time. Since the elevation is always negative perhaps GPredict is tracking what would have happened if the earth was just a tiny point of mass and the satellite is able to continue its downward descent. HAWKSAT1 shows up as above ground and running in GPredict. Since ARISSAT1 is probably going to decay fairly quickly I took a look at predicting ahead using the great Preview tracking in SatPC32 to see how decay is handled. After a couple of really bad years the coverage map for ARISSAT1 looks better than ever starting just two years from now in 2014. Unfortunately I could not figure out how to get GPredict to predict more than 14 days in the future and did not want to fool around changing the system clock. I have wondered what the NORAD routines would do after decay and how tracking programs that use the NORAD model would deal with it. Does the NORAD model continue to track as if the earth was just a very small very heavy point in space. A transparent 3D earth display would be very interesting to use to view the post chicken little results - someone must have one. Anyone know for sure ? HAWKSAT1 is still a bit of a mystery. 73 W9KE tom ... ___ 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 ___ 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: Oscarlocator
Or operating via the vintage way to compensate for doppler shift by twisting the large knob! Joe WB9SBD The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 10/13/2011 8:20 PM, Clayton Coleman W5PFG wrote: Seeing this kind of enthusiasm for vintage satellite gear might just inspire some enterprising individual to produce some brand new OSCAR Locators. On Thu, Oct 13, 2011 at 6:49 PM, Kevin Deanesummit...@live.com wrote: Anyone want to get rid of one I'll send you a SASE! Kevin 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 ___ 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: Which preamp to buy for 2m?
One of the best SSB alternatives is actually the preamps from HF-Berg in Germany! http://hf-berg.de/HFC/preisliste_amateurfunk.htm You can contact them directly and they will ship it to you. The price for their 2m preamp with VOX and protective housing is currently Euro 154. That's what you more or less will pay once they deduct the local sales tax because you buy from the US and add shipping cost. Don't worry about the website being in German they are very good in getting back to you in English and their shipping is quick and reliable and they take PayPal. Hope this helps, Stefan On Thu, Oct 13, 2011 at 2:26 PM, Burns Fisher bu...@fisher.cc wrote: First, my sincere apologies...I think I managed to resend the entire digest to the list. I HATE it when people do that but now I know how easy it is to do accidentally. Sorry. Now to what I was going to say: I have the SSB SP-2000 and I'm also very happy with it. It seems to do auto RF switching well down to under 2 watts. (Some auto-switching are only spec'ed to switch down to 8 or 10W). It also bypasses itself if you just cut the power (to be expected, I guess). I'm using it with a second power feedline (which you can connect with a PL259) since I don't happen to have 13.8V phantom power available. On the other hand, it is about the most expensive 2m preamp you can find :-( Where to get it in the US? ssbusa.com appears to be a distributer. No one answered the phone, and they never returned my call. Another vendor (take it from whence it came) said they were phasing out. But in any case, Array Solutions was very helpful and fast and sent me my SP-2000 in a very short time. As I recall I had to talk to them on the phone since they did not have the SSB stuff fully integrated into their web site yet, but it was worthwhile. Array Solutions also advertises in QST :-) Burns, W2BFJ Message: 14 Date: Thu, 13 Oct 2011 10:19:24 -0400 From: Stephen E. Belter s...@wintek.com To: Tim Goodrich t...@timgoodrich.net, amsat-bb@amsat.org amsat-bb@amsat.org Subject: [amsat-bb] Re: Which preamp to buy for 2m? Message-ID: 51668A33220E754EABE6583357ECEE2D79CD61B2@Exchange.wintek.local Content-Type: text/plain; charset=us-ascii Tim, I own SSB preamps, the SP-2000 (2 meter) and SP-7000 (70 cm). They have worked very well for me, both on my Icom IC-821 (powered by the radio) and with my FUNcube Dongle (powered with an external bias-T from ARR). The SSB preamps have helical filters on the front end which should help in your Los Angeles RF environment. You have at least four sources for the SSB preamp: 1. Direct from SSB in Germany, www.ssb.de 2. From SSB-Electronics USA, www.ssbusa.com 3. From Array Solutions, www.arraysolutions.com 4. From Universal Radio, www.universal-radio.com 73, Steve N9IP -- -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Tim Goodrich Sent: Thursday, October 13, 2011 2:04 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Which preamp to buy for 2m? Hi all, I just got a M2 2M4 and 420-50-11 to mount on my az/el rotor and go with my 736R. As I'm hoping to potentially work some EME with the big guns when conditions are just right, I'm wondering if anyone can provide advice on which preamp to get for 2m. I live in the Los Angeles metro area, so lots of noise/QRM, and also would like something to take advantage of the 736's preamp switch/voltage over coax option. In other words, something that doesn't require any complicated power/switching controls, if possible. Any suggestions? Thanks, Tim K6TW ___ 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
