[amsat-bb] Re: AO-51 power levels
Hi Gould! Thanks for the update. I recalled seeing that the power has been dropped because of the 2 transmitter setup for Field Day. Apparently, what I am seeing is that if the bird is a low pass I have a hard time receiving it because of the distance. A fairly high pass, 63 degrees turned out alright though I did notice a number of station having poor audio into the receiver. If the uplink was strong the downlink was strong. AA5PK and myself were a good example tonight. We had the bird practically to ourselves for the first 3 to 4 minutes of the pass. We could hear others trying to get in but their audio was pretty bad and hard to understand. The good news is once Field Day is over then the eclipses begin to get shorter, though no connection between the two. :) Again, thanks to you and Drew for keeping the bird healthy and the operators happy. :) 73, Jeff WB3JFS Las Vegas, NV DM26 - Original Message - From: "Gould Smith" To: ; "Jeff Yanko" ; Sent: Thursday, June 25, 2009 7:25 PM Subject: AO-51 power levels >I am still trying to tweak the power levels to get through all the eclipes >during the day. > > Tonight I changed TXA (L/U) to 210 mW and TXB (V/U) to 290 (as low as I > can get it without turning it off). > The eclipse I measured on one pass tonight was 16:05 minutes +- 5 sec. > The eclipse time should start to decrease over the next few days. > > 73, > Gould, WA4SXM > - Original Message - > From: > To: "Jeff Yanko" ; > Sent: Thursday, June 25, 2009 9:45 PM > Subject: [amsat-bb] Re: AO-51 > > >> If I recall correctly from a post last week, the U/V pair is operating at >> roughly 290 milliwatts RF out on transmit, and the L/U pair is at roughly >> 260 mW. In other words, each transmitter is operating on slightly more >> than SO-50 (250 mW) power levels. >> >> I have had passes this week where the satellite was armchair copy on one >> pass, and about like has been described this evening on another. I >> suspect the lower power levels (half or less of what has been nominal for >> most of the past year) and the inevitable mismatch (depending on the >> angle between the satellite and a given ground station) of its >> circular-polarized antennas to many ground stations' linear-polarized >> antennas are contributing to the reception differences. >> >> Drew (KO4MA) or Gould (WA4SXM) can comment - and I hope they will if this >> is incorrect - but I suspect that AO-51 continues to operate as it has >> recently. I appreciate very much their efforts to maintain the satellite. >> That being said, it will definitely prove to be a challenge to work for >> many Field Day stations. >> >> I hope I can get the one contact on it that I can count for the club FD >> effort I'll be a part of. And I hope that other stations will make their >> one allowed contact and give other stations the same chance to get >> theirs. >> >> Best of Field Day luck and 73 to all, >> >> Tim - N3TL >> -- Original message from "Jeff Yanko" >> : -- >> >> >>> Wondering if AO-51 is operating? Just listened for the 2357z pass and >>> nothing received. The last time I checked the status of the bird it >>> shows >>> that the 435.300 downlink was active. I also listened for the 435.150 to >>> no >>> avail. >>> >>> >>> 73, >>> >>> Jeff WB3JFS >>> Las Vegas, NV >>> DM26 >>> >>> >>> ___ >>> 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 >> > > ___ 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-51 power levels
I am still trying to tweak the power levels to get through all the eclipes during the day. Tonight I changed TXA (L/U) to 210 mW and TXB (V/U) to 290 (as low as I can get it without turning it off). The eclipse I measured on one pass tonight was 16:05 minutes +- 5 sec. The eclipse time should start to decrease over the next few days. 73, Gould, WA4SXM - Original Message - From: To: "Jeff Yanko" ; Sent: Thursday, June 25, 2009 9:45 PM Subject: [amsat-bb] Re: AO-51 > If I recall correctly from a post last week, the U/V pair is operating at > roughly 290 milliwatts RF out on transmit, and the L/U pair is at roughly > 260 mW. In other words, each transmitter is operating on slightly more > than SO-50 (250 mW) power levels. > > I have had passes this week where the satellite was armchair copy on one > pass, and about like has been described this evening on another. I suspect > the lower power levels (half or less of what has been nominal for most of > the past year) and the inevitable mismatch (depending on the angle between > the satellite and a given ground station) of its circular-polarized > antennas to many ground stations' linear-polarized antennas are > contributing to the reception differences. > > Drew (KO4MA) or Gould (WA4SXM) can comment - and I hope they will if this > is incorrect - but I suspect that AO-51 continues to operate as it has > recently. I appreciate very much their efforts to maintain the satellite. > That being said, it will definitely prove to be a challenge to work for > many Field Day stations. > > I hope I can get the one contact on it that I can count for the club FD > effort I'll be a part of. And I hope that other stations will make their > one allowed contact and give other stations the same chance to get theirs. > > Best of Field Day luck and 73 to all, > > Tim - N3TL > -- Original message from "Jeff Yanko" > : -- > > >> Wondering if AO-51 is operating? Just listened for the 2357z pass and >> nothing received. The last time I checked the status of the bird it shows >> that the 435.300 downlink was active. I also listened for the 435.150 to >> no >> avail. >> >> >> 73, >> >> Jeff WB3JFS >> Las Vegas, NV >> DM26 >> >> >> ___ >> 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 > ___ 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] AJ9K on FM birds from KL7 (2-11 July)
I will be on vacation in Alaska between July 1 - 11, and will try to be active during a few passes during my stay. I will be using my 5w VX-5R HT and AL800 whip on AO27, SO50 and AO51, if in mode J. Here's my schedule: 2 July2 BP51 Anchorage 3-4 July AO63 Dutch Harbor, Aleutian Isl 5-8 July BP64 Fairbanks 9-11 July BP42 Denali NP While in transit, I may be able to fit in a few more grids. Since this is a vacation, and I will have minimal control over my schedule (that's my family's job, and I'm only a minority voting member...). I hope to be as active as practical. 73, Dan AJ9K ___ 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: AO-51
If I recall correctly from a post last week, the U/V pair is operating at roughly 290 milliwatts RF out on transmit, and the L/U pair is at roughly 260 mW. In other words, each transmitter is operating on slightly more than SO-50 (250 mW) power levels. I have had passes this week where the satellite was armchair copy on one pass, and about like has been described this evening on another. I suspect the lower power levels (half or less of what has been nominal for most of the past year) and the inevitable mismatch (depending on the angle between the satellite and a given ground station) of its circular-polarized antennas to many ground stations' linear-polarized antennas are contributing to the reception differences. Drew (KO4MA) or Gould (WA4SXM) can comment - and I hope they will if this is incorrect - but I suspect that AO-51 continues to operate as it has recently. I appreciate very much their efforts to maintain the satellite. That being said, it will definitely prove to be a challenge to work for many Field Day stations. I hope I can get the one contact on it that I can count for the club FD effort I'll be a part of. And I hope that other stations will make their one allowed contact and give other stations the same chance to get theirs. Best of Field Day luck and 73 to all, Tim - N3TL -- Original message from "Jeff Yanko" : -- > Wondering if AO-51 is operating? Just listened for the 2357z pass and > nothing received. The last time I checked the status of the bird it shows > that the 435.300 downlink was active. I also listened for the 435.150 to no > avail. > > > 73, > > Jeff WB3JFS > Las Vegas, NV > DM26 > > > ___ > 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: AO-51
It's on, but the power on 435.300 is less than a third of what it was last Saturday, since we are running two repeaters for Field Day. We are also in the really inefficient part of the transmitter power curve. AO-51 is five years old this month, and her age is beginning to show. Power levels will start to go back up soon, as we reenter continuous illumination before the end of July. 73, Drew KO4MA - Original Message - From: "Dacia & Warren Brandt" To: Sent: Thursday, June 25, 2009 9:23 PM Subject: [amsat-bb] Re: AO-51 > It just passed over me a couple of hours ago. The signal is very weak > compared to last Saturday. I could tell the satellite was there, but > couldn't make out what anyone was saying. > > Warren - KC0U > > -Original Message- > From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On > Behalf Of Jeff Yanko > Sent: Thursday, June 25, 2009 7:10 PM > To: amsat-bb@amsat.org > Subject: [amsat-bb] AO-51 > > Wondering if AO-51 is operating? Just listened for the 2357z pass and > nothing received. The last time I checked the status of the bird it shows > that the 435.300 downlink was active. I also listened for the 435.150 to > no > > avail. > > > 73, > > Jeff WB3JFS > Las Vegas, NV > DM26 > > > ___ > 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 ___ 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-51
Wondering if AO-51 is operating? Just listened for the 2357z pass and nothing received. The last time I checked the status of the bird it shows that the 435.300 downlink was active. I also listened for the 435.150 to no avail. 73, Jeff WB3JFS Las Vegas, NV DM26 ___ 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-51
it was on abit week for a 53 el pass, but heard a few stations working, Rodney kc0zhf ___ 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: AO-51
It just passed over me a couple of hours ago. The signal is very weak compared to last Saturday. I could tell the satellite was there, but couldn't make out what anyone was saying. Warren - KC0U -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jeff Yanko Sent: Thursday, June 25, 2009 7:10 PM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 Wondering if AO-51 is operating? Just listened for the 2357z pass and nothing received. The last time I checked the status of the bird it shows that the 435.300 downlink was active. I also listened for the 435.150 to no avail. 73, Jeff WB3JFS Las Vegas, NV DM26 ___ 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] Circular switching techniques
All, has anybody had any real success with the switching method described in the ARRL Antenna Handbook using one coaxial relay and a length of 93 ohm line to switch from LHCP to RHCP on crossed yagis? I have tried this method several times and there appears to be very little difference in signal level. I seem to think that the 93 ohm cable is close enough to 75ohm and becomes a transformer instead of the delay line that the idea is trying to achieve. I also seem to think that for this idea to work properly that the delay line impedance should be in the vicinity of 110-125 ohms. I have seen many methods using two relays, and yes that would have to be the surest method of accomplishing this. However, for ease of construction I like the single relay method. I have constructed these to the letter using only one velocity compensated ¼ wave length of coax on the 75ohm transformers and on the delay line, thats were I thinking that the transformer sections and delay lines should perhaps be long odd multiple of a ¼ wave length, i.e.; 3/4 , 5/4 etc to see a better impedance match. Any ideas from past experience would be appreciated. Best 73s Frank VK5KV ___ 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] VO-52 W4IY on FD
Woodbridge Wireless will be on VO-52 (HAMSAT.) Looks like the Indian Transponder is active. Hope to work you guys. Should be fun. We're going to try omnis, Ham Radio Deluxe and a TS-2000. 73's Stu2 W7IY ___ 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] AMSAT Contact
Which AMSAT member should I contact regarding a CubeSat construction inquiry? Clint, K6LCS 909-241-7666 -- Clint Bradford, K6LCS http://www.clintbradford.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] Hudson Valley Satcom Group Net Tonight June 25 At 8PM Echolink node n2eyh-L
Hello all. It's time again for The Hudson Valley Satcom Group Net. You can check-in on Echolink n2eyh-L.Or if you are in the Hudson Valley area on the Mt. Beacon repeater on 146.970 pl100. Please join us. The Net will be celebrating it's third anniversary in September. We usually have one or two Amsat area coordinators on the net two answer any of your questions. Hope to hear you there tonight at 8PM EDT. 73 Gary **Make your summer sizzle with fast and easy recipes for the grill. (http://food.aol.com/grilling?ncid=emlcntusfood0005) ___ 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] Field Day Call Sign
After taking a year off last year... Wisconsin Nine Lousy Operator W9LO Will be back again... Gary - N9UUR ___ 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: Field Day Call Sign
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I'll be operating W1AEC Sunday morning and hope to get on some on the FM birds. - -- Ben Jackson - N1WBV - New Bedford, MA bbj innismir.net - http://www.innismir.net/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQEcBAEBAgAGBQJKQ4gKAAoJEAQiWVsfSvVvyDoIAJNtFEIyVjC2miQ+3ho0fj9O d8s7BnfmsTxAKfhTgIqnBcO8PcObXr/AwxXb836twZOumlPatXqYwXOlpDv4eZPT ySulWhtjwjcCMCjoD61GY4qU4gs98i5200+f64iN4jL32uJeP3xoOSboPjz07WeA LpvxJZENwf80ap0ar+HHcxHzCzSm8Vb8THRQ+HB1vUSU7TI2V4Wo37a6QoJkxE0i Dcb8aD6sFGop30vB1Eeiz1gdVSFJJlnZy6/AiIkRWojJgyJz7qTnyudY8KJmQeXa k0iUlJ9OVshpo57kK7Q7xLeJV8eia+JNIm5bmEZulfdU6la14BGf7TsO5SSCWaw= =xne3 -END PGP SIGNATURE- ___ 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] Field Day Call Sign
I'll be operating as *W0YI* - Story County Amateur Radio Club, Ames, Iowa at Iowa State University. Rick Allen N0CFL ___ 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] Field Day Call Sign
I'll be operating as *W0YI* - Story County Amateur Radio Club, Ames, Iowa at Iowa State University. Sorry if I have duplicated this email but I tried to post before and it did not go... 73, Rick Allen N0CFL ___ 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: Powering a UHF mast mound LNA from a TS2000
Hello Piet, The real question to ask is what the current draw of the ARR mast mounted preamplifier with internal relays will be, and if the Kenwood TS-2000 can source that current. Others can comment as to the Kenwood's capability, but you can measure the current draw of the ARR. I suspect the Kenwood may not be rated for that current and either an external DC injector is needed to put DC on the coax or other wiring direct to the ARR is needed. A sequencer could be used to source the current and under MIC PTT control would properly turn it off during TX. Stan, W1LE Cape CodFN41sr Pieter Kotze wrote: > Does the Kenwood have a inline 12V power supply option like the Icom 821? I > can't seem to find it? Or do I need to connect a separate power lead to my > ARR mastmount amp? > > 73 > Pieter > ZS1PK/M0PAK > > ___ 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: Field Day Call Signs
W0WTN -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of n...@bellsouth.net Sent: Wednesday, June 24, 2009 7:14 AM To: AMSAT-BB@amsat.org Subject: [amsat-bb] Field Day Call Signs Hey everyone, How about posting the call sign you'll be using over Field Day weekend for satellite contacts? Here, I'll be providing the satellite station for the combined FD effort of the Athens Amateur Radio Club and the Northeast Georgia ARC, and they have obtained the special 1x1 call W4G for Field Day. I know many of us will be using club calls over Field Day, and I'm interested in know "who will be who" this weekend. I'm also interested in CW contacts on AO-7, FO-29 and VO-52, so I hope those of you who will be working those three will bring a key or paddle along. If you do, please listen for W4G a few kHz below the middles of theses satellites' passbands. 73 to all, and enjoy Field Day! Tim - N3TL Athens, Ga. - EM84ha W4G for Field Day 2009 ___ 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: Field Day Call Signs
W0RR - Heart of American Radio Club, Kansas City, MO Gail McDaniel KB0RZD ___ 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: AMSAT-BB Digest, Vol 4, Issue 294
Frank, I'll be returning to Diego Garcia (VQ9, Grid MI62) in August and expect to set up shop on the FM and linear birds shortly thereafter. With AO7's footprint, we should have a shot at making a go of it as well. 73, Jim, ND9M / VQ9JC Date: Thu, 25 Jun 2009 19:02:37 +0930 From: "Frank Woolfe" Subject: [amsat-bb]? Looking? for AO7 Contacts To: Message-ID: <200906250932.n5p9wiqw013...@mail01.syd.optusnet.com.au> Content-Type: text/plain;?? charset="us-ascii" Looking for possible Contacts from Stations on AO7 in Indonesia, Philippines, Japan, Malaya etc; CQ zones 26,27,28,29,30, VK Stations are always listening mainly Mode B and center of the passband. Frank VK5KV ___ 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] Looking for AO7 Contacts
Looking for possible Contacts from Stations on AO7 in Indonesia, Philippines, Japan, Malaya etc; CQ zones 26,27,28,29,30, VK Stations are always listening mainly Mode B and center of the passband. Frank VK5KV ___ 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] Powering a UHF mast mound LNA from a TS2000
Does the Kenwood have a inline 12V power supply option like the Icom 821? I can't seem to find it? Or do I need to connect a separate power lead to my ARR mastmount amp? 73 Pieter ZS1PK/M0PAK -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ 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
