[amsat-bb] Re: Satellite at 1.2 GHZ
Dear Mineo, Is CO-65 still operational ? 73 de ZS1LS -Original Message- From: Mineo Wakita [mailto:ei7m-...@asahi-net.or.jp] Sent: 15 July 2013 01:55 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Satellite at 1.2 GHZ 1.2 GHz satellite is CO-65 (CUTE1.7+APDII), not CO-56. Uplink 1267.600MHz Downlink 437.475MHz, 9600bps GMSK http://www.ne.jp/asahi/hamradio/je9pel/ct17gmsk.htm JE9PEL, Mineo Wakita ___ 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] HO-68 WiSP directory download success
Hi, Just something I noticed on the 1845 Ho-68 pass. For 2 days I have been trying to download the directory without success. I uploaded 3 files now, but still couldn't get the directory. I then switched to voice mode with PL=67 Hz, and then tried again and the directory came screaming down. Very odd indeed. There are some screen shots here. http://www.rfdesign.co.za/default.asp?pageID=785423593filePath=D:\SoftPage_V5\files\5645456\Download-Library\Amateur-Radio\ZS1LS\Satellites\HO-68 73' Allan ZS1LS ___ 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: Fwd: 910/1.2ghz/sequencer
Hi Bob, You have to modify the IC-910 for it to work properly with a sequencer. I mounted a 3.5mm stereo socket on the back of the rig at the bottom RH corner at the back (looking at the back). I cut the PTT track coming from the MIC connector going to PIN 6 on the MIC PCB inside the IC-910 at the front. I then wired the Tip pin of the 3.5mm socket to the MIC, and the Ring of the 3.5mm socket to pin 6. Ground was connected to the shield of the 2 core cable. This way you intercept the PTT from the MIC and send it out the back of the rig via the Tip to the Sequencer, and then the TX delayed signal comes back in via the Ring to fire up the Transmitter. When not running the sequencer I just put in a 3.5mm stereo plug into the socket into the back of the rig with the tip and ring bridged. Some words of caution. NEVER hit the Transmit button on the rig. Also, if you plan to hook the 910 up to a TNC, you MUST use the PTT line from the TNC going to PIN 3 of the ACC or Main Data sockets otherwise the rig gets confused about what audio source to use. What I do is send the PTT signal from the TNC to the sequencer first, then the delayed output back to pin 3. Hope that helps. 73's Allan ZS1LS -Original Message- From: Bob- W7LRD [mailto:w7...@comcast.net] Sent: 23 January 2010 04:49 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Fwd: 910/1.2ghz/sequencer not takers on my first inquiry. I even sent a note to Icom, they may get back to me someday. I know there are some 910 smarties out there. Hello I am trying to set up my 910/sequencer/amp. Checking things out before hard wiring everything I discovered when grounding pin 3 of the acc socket the radio does go to xmit, and will do cw, however to send ssb the ptt on the mic has to be pushed. At times I use a Heil head set that has no PTT and I simply push the xmit on the radio. Do I have to pick off the PTT at the mic connector? I am probably overlooking something obvious. What do you 910 experts have to say. As always, thankyou 73 Bob W7LRD ___ 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] SatPC32 12.8a and IC-910
Hi Erich, Thanks for the great upgrade. I see you incorporated the CW-N mode and the display of the DOPPLER.sqf line in the CAT menu I suggested :) You are correct, one of the issues with fast changes in Doppler on a CW-N signal is that it jumps in pitch a lot. I enabled the x5 and x10 mode and I can see SatPC32 is now polling the IC-910 much quicker (the SUB light on the LCD flashes an instruction is sent to the rig via C-IV). But what I cant figure out is that even if I set the CW/SSB interval to 10Hz, the rig only changes every 100Hz. When I make small changes to the VFO by rocking the dial back and forth on the rig the full update to the goes back to the frequency display in SatPC32 right down to the last Hertz but as soon as I let go of the VFO knob the IC-910 jumps to the nearest 100 Hz increment up or down when the next C-IV instruction is received from SatPC32. So it seems the full frequency command is going from the IC-910 to SatPC32 but its not accepting it from SatPC32 ? Or am I missing something ? Maybe someone else can test and confirm this. 73's and Best Regards, Allan ZS1LS ___ 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] Arrow 10W Duplexer Performance Measurements
Quite a lot of guys are using the handy Arrow Model 10W duplexer for the handheld 146/437 antenna and mine arrived here today so I thought I would put it on the network analyser and see how it performs. From the Radio cable to the 2m antenna connector an Insertion Loss of 0.75dB was measured with a rejection of 57dB at 70cm. The VSWR at 2m was 1.24:1 From the Radio cable to the 70cm antenna connector an Insertion Loss of 1.2dB was measured with an attenuation of 56dB on the 2m signal. The VSWR at 70cm was 1.29:1 The VSWR on the 2m port was 1.21:1 and on the 70cm port was 1.20:1 For those guys wanting to look at the actual plots they can be found here http://www.rfdesign.co.za/default.asp?pageID=785423593filePath=D:\SoftPage_V5\files\5645456\Download-Library\Amateur-Radio\ZS1LS\Mode-J-Filter 73's Allan ZS1LS ___ 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: Arrow 10W Duplexer Performance Measurements
Hi Bruce, I am afraid you are very much mistaken in your logic here. For mode J on AO51 say, The 5W signal you transmit on 2m will completely drive that 70cm preamp between the antenna and duplexer into saturation unless you put a very good filter on the input (the desense issue). That insertion loss might negate any gains you make on the preamp, increase your noise floor by 20dB and add a lot of hassle, and more importantly weight. Actually, the 1.2dB insertion loss is better than I was expecting and good enough for the short cable run to the HT. It is what it is and its good enough for the job it was intended for. 73's Allan -Original Message- From: Bruce Robertson [mailto:ve9...@gmail.com] Sent: 21 October 2009 02:01 PM To: Allan Saul Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] Arrow 10W Duplexer Performance Measurements I'm grateful to everyone who has contributed to this discussion. It strikes me that the greatest improvement we could make to hand-held yagis would be to somehow integrate a low noise preamp circuit very close to the 70cm port. I have an indoor-style ARR preamp that I've thought of connecting to the boom with cable ties. A powersupply using AA batteries and a DC to DC buck-boost chip from, e.g., Maxim, would keep the whole thing light. (Alternatively, I see that the max voltage for my ARR is pretty high: I might get away with a pair of Nicad '9v' batteries.) Like so much of amateur radio, it's more of a challenge of construction than anything else. Has anyone experimented with this sort of improvement? 73, VE9QRP Bruce On Wed, Oct 21, 2009 at 8:21 AM, Allan Saul al...@rfdesign.co.za wrote: Quite a lot of guys are using the handy Arrow Model 10W duplexer for the handheld 146/437 antenna and mine arrived here today so I thought I would put it on the network analyser and see how it performs. From the Radio cable to the 2m antenna connector an Insertion Loss of 0.75dB was measured with a rejection of 57dB at 70cm. The VSWR at 2m was 1.24:1 From the Radio cable to the 70cm antenna connector an Insertion Loss of 1.2dB was measured with an attenuation of 56dB on the 2m signal. The VSWR at 70cm was 1.29:1 The VSWR on the 2m port was 1.21:1 and on the 70cm port was 1.20:1 For those guys wanting to look at the actual plots they can be found here http://www.rfdesign.co.za/default.asp?pageID=785423593filePath=D:\SoftPage_V5\files\5645456\Download-Library\Amateur-Radio\ZS1LS\Mode-J-Filter 73's Allan ZS1LS ___ 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] Why is AO-27 not available in the Southern Hemisphere ?
Hi, Is there someone out there that can explain to me why AO-27 cannot be made available to Radio Amateurs south of the equator ? There are a bunch of operators in South America, South Africa, Australia and New Zealand amongst others who would dearly like an opportunity to operate on this satellite. Is there some valid technical reason it cannot be made available to us for a few days per month ? Allan ZS1LS South Africa ___ 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: Murphy on my G-5400B control box
Hi Sebastian, I had the same problem on my control box last week. Turns out there was a shorted turn in the transformer. Remove the cables to the rotator and LVB tracker and check you are getting the 11V and 26V AC out of the transformer. I just sent it down to one of the specialist companies the re-wind transformers in the area to fix it rather that going though the pain of sending it back to Yeasu for replacement. Best Regards, Allan Saul ZS1LS -Original Message- From: Sebastian [mailto:w...@bellsouth.net] Sent: 09 July 2009 01:15 AM To: AMSAT BB Subject: [amsat-bb] Murphy on my G-5400B control box Seems I can't get a break from Murphy. A couple of weeks ago, I received my azimuth rotor G5400B control box back from Yaesu after the rotor had failed. Yesterday I noticed the control box had turned off, and was generating a lot of heat. Sure enough, I checked the fuse, and it was blow. Opening up the case and looking for obvious problems, such as cold solder joints, burned components, etc., didn't show anything interesting; other than a hot transformer. Unit blows fuses as soon as they are replaced. So before I call up Yaesu and am off the air for another 2 or 3 weeks, any ideas from someone who perhaps has had the same problem? I had it connected to my LVB tracker, which no longer functions, as I believe it gets its power from the control box. 73 de W4AS Sebastian ___ 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: G-5500 and LVB tracker question.
Hi Howard and Marv, I had exactly the same problem. The issue revolved around the 7806 regulator the is used in the G-5500 control box that supplied the 6V DC to the position feedback potentiometers on the rotators. If you monitor the output voltage of the regulator, you will find they drift down considerably as the box warms up. Maybe they had a bad batch. I replaced the 7806 with a LM317T set for 6V and that solved the problem. 73's Allan Saul ZS1LS -Original Message- From: Howard Long [mailto:how...@howardlong.com] Sent: 30 June 2009 10:09 AM To: 'racer5039'; amsat-bb@amsat.org Subject: [amsat-bb] Re: G-5500 and LVB tracker question. Hi Marv. If you have the LCD fitted, do both the left and right Az/El readings move too? I am assuming you don't have the problem if the LVB Tracker is unplugged. 73, Howard G6LVB -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of racer5039 Sent: 30 June 2009 00:13 To: amsat-bb@amsat.org Subject: [amsat-bb] G-5500 and LVB tracker question. I have the G-5500 and a LVB Tracker on my antenna set. I have noticed that when the pair are just setting there the LVB tracker will loose its place. By that I mean if the G-5500 box is at 180* the LVB will start out at 180 but as it sets there it will soon be at 178, 174, 172 and so on. I also noted the meter on the g-5500 is going down too. Where do I start looking ? Marv N0FJP ___ 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
