AMSAT-BB August 2007

135 participants
178 discussions

Re: KD6PAG Results of Southwest US grid square trip.
by John W Lee 26 Aug '07

26 Aug '07

Great Job, John, Those who missed this trip missed some RARE grids and counties. And the cards are great! No mass-produced cheapies here, each one is personalized with pictures, etc. Very nice. John would probably be glad to receive your cards if you worked him. 73 John, K6YK

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Re: [eu-amsat] AO-7 Distance Record.
by John Hackett 26 Aug '07

26 Aug '07

Hi Gents, Well, I'm with Thomas HB9SKA on this one. For a satellite QSO you need to calculate the distance from the transmitter to the receiver ... ie, Station A to the satellite concerned ... and from the satellite to station B ... then add them together to get the true distance the signal travels. Like Thomas says ... using the locator to locator measurement only gives the "terrestial" distance. 73 John. <la2qaa(a)amsat.org>

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26 Aug 2007 1138z ANDE-1???
by karn suwanrat 26 Aug '07

26 Aug '07

Hello all. 26 Aug 2007 1138z. I Received on145.8250MHz. 1:Fm E20ZFD To APRS Via ANDE-1 <UI pid=F0 Len=50 >[18:38:39] =1347.03N/10032.15E-E20ZFD APRS Via ANDE {UISS51} 1:Fm ANDE-1 To BEACON <UI pid=F0 Len=39 >[18:38:41] T#001,104,163,145,149,140,10101110,000 1:Fm E20ZFD To APRS Via ANDE-1* <UI pid=F0 Len=50 >[18:38:42] =1347.03N/10032.15E-E20ZFD APRS Via ANDE {UISS51} Thank you 73,s Karn Suwanrat E20ZFD

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AO-7 Distance record.
by John Hackett 26 Aug '07

26 Aug '07

Hi Thomas, Mak, Don't worry about it ... (I'm not) ... it doesn't matter which program one uses to calculate the distance ... Frei Island to Japan is still the longest LEO contact to the best of my knowledge ... though that one was on FO-20. 7800 or "merely" 6500Km on AO-7 ... it's still better than a kick up the arse. At least I do have the QSL's for the regular contacts from Frei Island to Eagle River, Alaska. <http://www.observations.biz/Observations_from_Norway/how_much_power_is_enou…> However, the distance is not so important but it is interesting to be able to illustrate what can be done with low power and home brew gear. NB. It's refreshing to see more and more American stations rediscovering CW and SSB on AO-7 but PLEASE !!!! watch the power. The gentleman "crowing" about your amplifier ... SWITCH IT OFF !!!. The *ONLY* time you need an amplifier is when you're using a 50 ohm resistor for an aerial. (Tongue-in-cheek of course but it is permissible to use common sense). The newcomer often uses far more power than is necessary ... and I can assure you, anadequate receiving system *DOES* help. Remember ... near the horizon AO-7 is 300Km away, at TCA (time of closest approach) it's only 1000Km above you and you need *A LOT* less power to communicate. Please read this ... <http://www.observations.biz/Observations_from_Norway/howmuchpowerisenough.h…> 73 John. <la2qaa(a)amsat.org>

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Re: A051
by Bruce 25 Aug '07

25 Aug '07

this method of correcting for doppler is an incorrect practice. It might be fine if you and your buddy are the only two on the satellite. also, notice you say 'you perfer', not the correct method. As doppler affects both frequencies, they should both be corrected using computer control. In the absence of computer control, the higher of the two frequencies is always corrected because doppler affects the higher frequency more. It does not matter if this is your tx or rx, it is always the higher frequency. 73...bruce -----Original Message----- From: "i8cvs" <domenico.i8cvs(a)tin.it> Subj: [amsat-bb] Re: A051 Date: Thu Aug 23, 2007 3:04 pm Size: 1K To: "Scott Wilson" <s.wilson(a)yahoo.com>, <k3szh(a)netzero.net>, "AMSAT-BB" <amsat-bb(a)amsat.org> ----- Original Message ----- From: "Scott Wilson" <s.wilson(a)yahoo.com> To: <k3szh(a)netzero.net>; <amsat-bb(a)amsat.org> Sent: Thursday, August 23, 2007 5:38 PM Subject: [amsat-bb] Re: A051 > For those more experienced, I do have a couple of questions: > > When operating an inverting linear, do you generally transmit on USB and > listen LSB or visa versa? Hi Scott, NW2S We transmit LSB and we receive USB because doing so many other radio hams dedicated to tropo traffic in VHF/UHF can hear us from the satellite by chance in 2 meters and 70 cm where they normally operate in USB for tropo. > When operating linear, what's the accepted approach to doppler correction? > It seems that you would be able to transmit without any correction, but > that your receive would vary a lot more - or perhaps again, visa versa? There are various preferences but since OSCAR-6 I prefere to keep constant the frequency of my return SSB signal while manually correcting the TX frequency to keep my voice constantly clear while speaking. If the operator in contact with me do the same then our QSO start and end on the same frequency during the whole orbit. I prefere to use separate RX and TX and in my case they are nothing special very old and mostly homebrewed equipments.

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FS: Cushcraft dualband Yagi
by John Geiger 25 Aug '07

25 Aug '07

I have for sale a Cushcraft A270-10S dualband (2m/70cm) yagi. This is the model with 5 elements on each band. It has only been up a month so it is still in very good shape. Hate to sell it but my HF/VHF/UHF rig died so need some money to get a replacement. I paid $130 new for it a month ago, I am asking $75 plus shipping. 73s John AA5JG (ex: W5TD, NE0P) 6M WAS #1275, 6m VUCC #1260 2m VUCC #615, Satellite VUCC #129

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Re: A051
by Bruce 25 Aug '07

25 Aug '07

if people would not snip the part out of the original post, you would have seen in my next sentence that I said in the absence of computer control you always correct the higher of the two frequencies as that is the frequency affected most by doppler. It does not matter if that frequency is the tx or the rx, always the higher of the two. rr on my daughter...boys, school, clothes and cd's take her money hihi she went off to university last week...maybe if she gets a fully automated station at school we would hear from her more often. 73...bruce -----Original Message----- From: "Roger Kolakowski" <rogerkola(a)aol.com> Subj: Re: [amsat-bb] Re: A051 Date: Fri Aug 24, 2007 6:03 pm Size: 1K To: "Marc Vermeersch" <mvermeer(a)skynet.be>, "'Bruce'" <KK5DO(a)amsat.org>, "'AMSAT-BB'" <amsat-bb(a)amsat.org> Bruce (a very influential and integral part of AMSAT) projected: > As doppler affects > both frequencies, they should both be corrected using computer control But computer control may not be available in DX, mobile, remote, battery power, "minimalist" or "emergency" situations. Computer control is an advancement, it should not keep people off the satellites. If everyone spouts "computer control" you will never give a "newbie" the satellite bug. I have a QSL card from Bruce's teen age daughter...Bruce, do you think she, as a bona fide Ham Radio operator, has the personal finances available, assuming she is saving for college, to put together a computer controlled SSB satellite station? Why should she be kept off the linear birds because she can only afford an inexpensive 435 SSB/CW rig and a preamp, downconverter for 2 meters to 10? (BTW my 2 kids are licensed also but they are 28 and 24 respectively.) I believe there should be correction, but it does not HAVE to be "computer controlled," it has to be on a best effort basis. Roger (first Satellite contact on RS-6 & multi contacts keying an FM rig) WA1KAT ----- Original Message ----- From: "Marc Vermeersch" <mvermeer(a)skynet.be> To: "'Bruce'" <KK5DO(a)amsat.org>; "'AMSAT-BB'" <amsat-bb(a)amsat.org> Sent: Friday, August 24, 2007 7:36 AM Subject: [amsat-bb] Re: A051 > > > this method of correcting for doppler is an incorrect practice. It might > > be fine if you and your buddy are the only two on the satellite. also, > > notice you say 'you perfer', not the correct method. As doppler affects > > both frequencies, they should both be corrected using computer control. > > Meaning: Keep the frequency at the satellite constant... Right? > > Thanks, > -- > /\/\arc > > > [snip] > > > _______________________________________________ > Sent via AMSAT-BB(a)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 >

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AO-7 Distance Record.
by John Hackett 25 Aug '07

25 Aug '07

Hi Mak, I believe I broke the AO-7 distance record this morning with a QSO with Patrick K9HF in Madison, Ohio, EM48UN. EM48UN to Frei Island JP33WB is just over 7800Km according to your DX calculator. Unfortunately, the e-mails I tried sending to Patrick at his address on QSL-COM and Amsat.org have all bounced so unless he reads this and contacts me with his QSL I cannot confirm the contact. Just like the one I had on FO-20 with Japan some years ago ... for the longest distance LEO DX QSO. However ... I presume you have seen the cards from AL7JK ??. <http://www.observations.biz/Observations_from_Norway/how_much_power_is_enou…> I've attached my own card for this mornings QSO with K9HF. If K9HF ... (or anyone else) ... contacts me with his e-mail address I'll let you know. 73 John. <la2qaa(a)amsat.org>

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dial up access
by Patrick McGrane 25 Aug '07

25 Aug '07

Greetings from username N2OEQ Thomas McGrane in mattituck ny I cant connect to the riverhead NY server after repeated tries using the proper username and password. Something new I'm also having trouble getting dumped at the mattituck Ny server. Please check into these, thanks, pat

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dial up access
by Patrick McGrane 25 Aug '07

25 Aug '07

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AMSAT-BB August 2007