[amsat-bb] FD Postmortem: was a cheap LEO tracker for single op
A quick follow-up and some questions. I made it to the FD site about 11pm local. Schedule had two passes of SO-50 (1am and 3am) and two passes of AO-7 (at 4am and 6am local). Let's focus on AO-7. I had my FT-847, two 10 ft lengths of coax, and the trusty Arrow dual-band. I had my Ubuntu netbook with gpredict and a printed frequency list. I ran AO-40 full manual back in the day (no computer assist or Doppler) --I can do this, right?: AO-7 (B) 432.125-175 up, 145.975-925 down. Load 432.125 on the main VFO, and 145.975 (USB) on the secondary. Set Sat mode, (tracking REVERSE) Hear the bird great -- can’t find my downlink. Nada. Voice or CW. Confirmed 432 TX and power out with a meter -- ran up to 30 watts in. Moved the sub-tune up and down on the RX side for Doppler (at least 15khz each side). Coax was connected correctly. Nothing on the next pass either excellent hearing, can’t find myself. Bird is directly overhead. Epic fail. So what did I do wrong? Did I have a de-sense issue because of the crossed yagi? Enough power? What sideband should the uplink have been (LSB, correct)? Even if it was wrong, I should have heard CW, right? Bill W1PA ___ 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: FD Postmortem: was a cheap LEO tracker for single op
Hi Bill, W1PA You are tuning the uplink 432.125 MHz (LSB) and 145.975 MHz (USB) for down link but so you are at the very edge of the transponder passband. I suggest to tune the uplink in the middle of the passband at 432.150 MHz (LSB) and while transmitting a CW string of dots tune very slowly the downlink in the middle of the passband around 145.950 MHz (USB) moving the RX tuning knob a little bit up and down on frequency until you hear your CW coming back. The rest of your station seems to be all OK. Have fun. 73 de i8CVS Domenico - Original Message - From: Bill (W1PA) w...@hotmail.com To: amsat-bb@amsat.org Sent: Wednesday, June 26, 2013 8:35 PM Subject: [amsat-bb] FD Postmortem: was a cheap LEO tracker for single op A quick follow-up and some questions. I made it to the FD site about 11pm local. Schedule had two passes of SO-50 (1am and 3am) and two passes of AO-7 (at 4am and 6am local). Let's focus on AO-7. I had my FT-847, two 10 ft lengths of coax, and the trusty Arrow dual-band. I had my Ubuntu netbook with gpredict and a printed frequency list. I ran AO-40 full manual back in the day (no computer assist or Doppler) --I can do this, right?: AO-7 (B) 432.125-175 up, 145.975-925 down. Load 432.125 on the main VFO, and 145.975 (USB) on the secondary. Set Sat mode, (tracking REVERSE) Hear the bird great -- can’t find my downlink. Nada. Voice or CW. Confirmed 432 TX and power out with a meter -- ran up to 30 watts in. Moved the sub-tune up and down on the RX side for Doppler (at least 15khz each side). Coax was connected correctly. Nothing on the next pass either excellent hearing, can’t find myself. Bird is directly overhead. Epic fail. So what did I do wrong? Did I have a de-sense issue because of the crossed yagi? Enough power? What sideband should the uplink have been (LSB, correct)? Even if it was wrong, I should have heard CW, right? Bill W1PA ___ 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: Nigerian scam span purporting to be from W0SL
Thanks Phil. Yes, I'm not sure how it was done but the settings are correct in my PC. ATT has helped me to assign a new password to my account to shut this down. They say it appears to have been hacked on the ATT web mail site. We too noticed the Reply To address change. I suspected something when I had no incoming mail. It appears that any, not just replies to me were going to that hacked address. The only thing I can think of is that ATT net mail was changing to a new setup. We were all notified that by June 30, all accounts would have to migrate to the new ATT.net/mail arrangement. Subsequently I received a message offering the opportunity to proceed with my migration. I did that and was surprised when they asked me to login again. Right there I gave someone my login info. They were then able to login to my web mail site and access the address book there. I am going to delete the address book there since I am not on the road much anymore. With the changed password, the hacker can no longer login into my account. My apologies to all who got that message. I have seen it before, coming from other people over the months. 73, Roy -- W0SL R/D/Gd/Ggd On 6/26/2013 11:05 PM, Phil Karn wrote: Today I got a scam email purporting to be from Roy Welch, W0SL, asking for an emergency loan. If I got it, I suspect many others on amsat-bb got it too. The originating IP address is in Nigeria. Where else? I've seen this exact scam before. In those cases someone had stolen the password of the person they were pretending to be. I don't think that happened here. The From address was his correct email account 'rdwe...@swbell.net' but the Reply-To: address was 'rdwel...@yahoo.com'. Note the extra 'l'. I think the scammers created this second account on Yahoo and used it to send the scam email, forging Roy's address in the from field. Any reply would, of course, go to the scammer's address on Yahoo and many people might not notice the subtle change. swbell.net has no SPF (Sender Policy Framework) records in the Domain Name System to indicate to the rest of the Internet which IP addresses may legitimately originate email from that domain, so recipient systems cannot easily detect forgeries. ___ 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: FO-29 wierdness during field day
Greg, I had a hard time getting into the bird on that pass, figured it was pointing angle or inversion layer. Next morning it was fine. Art, KC6UQH (W6NWG for FD) -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Greg D Sent: Tuesday, June 25, 2013 8:50 PM To: Amsat BB Subject: [amsat-bb] FO-29 wierdness during field day Hi folks, Now that the bustle of Field Day is over, an observation I want to pass on. Did anyone else experience this? On one of the Saturday night passes I noticed that FO-29 suddenly went kind of silent. Not totally so, but enough that the QSO that I was desperately trying to complete was interrupted. It was around 9:45 pm local PDT, if I recall. Just finished with K6MMM, and was trying to get K6AA, I think. (Note to self: turn on the recorder next time!) I didn't check for an eclipse, but that's my guess, though it was also about the time the bird went past TCA and all Doppler had broken loose. The bird sounded like 20 meters during the day, but with everyone's VFO on skids going in different directions. Right towards the end of the pass I heard another station on, so I know the bird hadn't died. Anybody hear that? Greg KO6TH ___ 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
