October 2010 - AMSAT-BB - mailman.amsat.org

Re: AO-7 Mode A antenna
by James Jipping 01 Nov '10

01 Nov '10

Good Afternoon, All: Ever have someone tell you to read and read, again any email you write before you send it ?? After church today, I went to get my email, and saw what I sent to "you all". DAH! A correction or two concerning that successful antenna. The one I described was used with marginal success. The one that really worked the best was in fact four slopping dipoles (at 45 degrees to the tower) , one for each directional side of the steel tower --- N, E, S, W, attached to the tower at about 40 feet up. Two relays gave me antenna selection at the tower so I could have only one feed line to the shack. I regularly worked all the AO and RS satellites is all directions. Mode A to Hawaii was a real challenge, but I did it often. Good Luck Jim Jipping, W8MRR

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SO67 Schedules
by Hans van de Groenendaal 01 Nov '10

01 Nov '10

For updates on SumbandilaSat SO67 and operating schedules visit www.amsatsa.org.za. Week One of every month covers the Americas, week 2 Europe, week 3 Middle East/.India, week 4 Japan and Australasia 73 Hans ZS6AKV

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Re: AO-7 Mode A antenna
by James Jipping 31 Oct '10

31 Oct '10

Back to the "Good Ole Days". The best antenna I ever had to receive sat signals on 10 meters was a pair of crossed dipoles at an angle of 45 degrees to the steel tower. It worked very well in several configurations. The two dipoles were: 1. Just tied in parallel. Impedance matching was a little bit of a concern 2. I tried a pair of impedance matching stubs much like that used for circular polarized antennas for 2 m and 70 cm. 3 I tried a pair if relays that allowed me to select any pair of the four legs for some sort of directivity using the tower as a "reflector" I used this configuration for all the old AMSAT and Russian mode A birds with with much better than avearge success. Helpful ?? Hope so! Jim Jipping, W8MRR AMSAT # 5512 Low number translates to old geezer

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Re: AO-7 Mode A antennas
by Daniel "Nick" Kucij 31 Oct '10

31 Oct '10

Jeff: I have not used an external 10M preamp yet, but I just got an ARR from another op, so I'll be giving it a try. So far, I've used my FT-847 and the internal preamp. It has not been as consistent as Mode B, but when the 10M signal is coming in, reception is usually fair to good. I have noticed quite a bit of QSB at times, so it's worth being patient. Nick KB1RVT

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Re: AO-7 Mode A antennas
by Daniel "Nick" Kucij 31 Oct '10

31 Oct '10

I've had recent Mode A success into Europe (Germany, France and Italy), using a cut-down Radio Shack CB magmount whip. It's stuck on to a large metal serving tray "borrowed" from the kitchen. I hide it behind an easy chair in a corner of the shack. 73 & GL! Nick KB1RVT

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rotor parts
by Dads 31 Oct '10

31 Oct '10

Hi : Does anyone have any interest in Alliance rotor parts ?? I have over 20 boxes of various rotor parts in there original boxes. I will also throw in a few new CDR parts all for $100.00 Jerry w0sat

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station add help
by Jack Barbera 31 Oct '10

31 Oct '10

I'm in the process of adding digital mode to my satellite station which consists of IC910 radio using SATPC 32 12.8A. I will be using a Signalink USB & would like to know if this is the way to go. I will be using it for packet, digipeater, SSTV.etc. Two programs that I'm looking into using are MIXW & or mltimode. I would appreciate any suggestions or help about moving foreword with this configuration. Thanks for any input. Jack WA1ZDV

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Interference
by Aquilino Torres 31 Oct '10

31 Oct '10

Mr. Larry: Good afternoon, this same 145,800 khz FM interference occurs in Bogotá Colombia, there are several telephones in service, brand SENAO, which are sold freely without control of the communications authorities Personally I can not work as an amateur radio on ISS 145,800 kHz FM frequency, sometimes the case with the satellite AO-51. Amateur radio frequencies are occupied by squatters, such as taxi companies, hotels, among others, however that writing and recordings have been made known to the authorities of Control communications, but so far has resulted in a eradication of these pirates. Aquilino Torres HK3Z

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KD8KSN/p EN80/EM89 this Afternoon
by Zachary Beougher 31 Oct '10

31 Oct '10

I have made a last-minute decision to operate from the EN80/EM89 gridline this afternoon. I will be on the AO27 pass at 1946z and AO51 at 2040z. There is a very, very slight chance I will NOT be on AO27 at 1946z, but that is a very remote chance. 73! Zack KD8KSN

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RCI-SE G5500 Interface
by Dean Maluski 30 Oct '10

30 Oct '10

Trying to setup Sat32PC, I have a G-5500 rotor and using an RCI-SE control board. I have been using Linux gpredict and hamlib to control rotor OK but wanted to try Sat32PC so trying setup a system. ARSWIN says I'm at 45 degrees when antennas are actually at 90 degrees. If I tell ARSWIN to go to 90 degrees antennas will then be at 180 degrees. Nowhere in setup can I find something to correct this.

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