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Author Topic: TURKSAT-3USAT  (Read 8145 times)
KA4NMA
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Posts: 320




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« on: June 25, 2013, 11:46:30 PM »

How would you set up an FT-817ND to use this bird?

Randy ka4nma
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KA4NMA
Member

Posts: 320




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« Reply #1 on: June 26, 2013, 08:25:08 PM »

Since this bird is a LEO, what are the requirements?  How can I set up my Icom 706mkII and Yasue FT-817 to work this satellite and any other linear birds?

Randy
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KQ6EA
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Posts: 609


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« Reply #2 on: June 27, 2013, 08:53:07 AM »

Have you worked satellites before, or are you just starting to?

If you're just getting started, the first thing to do is to try and listen to the satellites. If you can't hear them clearly, please don't transmit as you might interfere with other stations.

Here's a very basic primer on getting started:

http://www.amsat.org/amsat-new/information/faqs/langdon.php

73. Jim
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KA4NMA
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Posts: 320




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« Reply #3 on: June 27, 2013, 07:03:48 PM »

Many years ago, while running 10m and 2m mobile, I worked one of the Russian birds.  When I heard my call, I nearly wrecked!

So it has been a while.

Randy
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KQ6EA
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« Reply #4 on: June 27, 2013, 07:15:30 PM »

 Grin

Yep, the first time will do that to you!

*IF* Turksat is opened for use, (no info available at this time) you'll operate it the same way as any other linear bird.

Use one radio to transmit your uplink to the satellite.

Use the other radio to listen to the downlink from the satellite.

Tune the receive radio to the middle of the downlink passband, and then transmit on the center frequency of the uplink passband.

Adjust your TRANSMIT frequency until you hear yourself, and then call CQ.

ONLY adjust the higher of the two frequencies to keep hearing yourself on the downlink.

A good Doppler correction method to follow is here:

http://www.amsat.org/amsat/features/one_true_rule.html

What antennas will you be using?

73, Jim
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KA4NMA
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Posts: 320




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« Reply #5 on: June 28, 2013, 08:21:44 PM »

I do not have an antenna, yet.  I live in an antenna restricted apartment.  Therefore I will use indoor antenna's or go portable. I am also economically challenged. What antenna's would you recommend?

Randy
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KQ6EA
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« Reply #6 on: June 28, 2013, 08:43:57 PM »

If you have a balcony, you could work the passes where the satellites are visible from the balcony. Otherwise go portable.

You'll have very poor results using simple omni antennas like a vertical unless you buy or build some preamps, and even then you'll have some difficulty working the linear satellites. You're always better off using a gain antenna than trying to amplify the signals from a "zero gain" antenna.

Since you indicate you're on a very low budget, I suggest you build a couple of the "Cheap Yagis" that Kent Britain, WA5VJB, designed. You can find the plans on the web, and all they take is some wood for the booms, and some brazing rod for the elements. These are literally "$10 antennas" and work very well.

You'll need a way to mount them, and a camera tripod works very well. If you can't find a cheap tripod somewhere, then plans are on the web for making cheap tripods from PVC pipe, but with the price of PVC pipe going up (at least around here), you might be better off looking on craigslist or at the Goodwill store for a tripod.
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W5PFG
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Posts: 74




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« Reply #7 on: June 30, 2013, 02:37:44 PM »

I do not have an antenna, yet.  I live in an antenna restricted apartment.  Therefore I will use indoor antenna's or go portable. I am also economically challenged. What antenna's would you recommend?

Randy

I work all of the current, operational satellites using either an Arrow II or Elk.  Both are around $100.  Look on the forums for used ones.  I see deals often.  If and when TurkSat's transponder is enabled, I would suspect you can work it with either suggested antenna. 

73
Clayton
W5PFG
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K6LCS
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« Reply #8 on: June 30, 2013, 03:14:02 PM »

You can get into the world of "high gain" with about $20 or so in parts: Build yourself a Tape Measure Beam!

Plans for it - and other build-it-yourself sat antennas - published on the ANTENNAS page at ...

http://www.work-sat.com

Clint K6LCS
909-241-7666
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Clint Bradford, K6LCS
http://www.k6lcs.com
W5PFG
Member

Posts: 74




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« Reply #9 on: July 01, 2013, 01:16:40 PM »

You can get into the world of "high gain" with about $20 or so in parts: Build yourself a Tape Measure Beam!

"High gain" is a bit subjective.  I would say high compared to a dummy load.

With the latest roster of satellites being predominantly mode B (transmit to satellite on UHF/70cm, receive on VHF/2m) I would advise people against building an antenna designed to transmit on 2m.  There is a dual-band tape measure beam design (is posted on Clint's site) based on a QST article by W6NBC that's decent.  You might also look at log periodic dipole arrays designs like the Elk.

I'd recommend the WA5VJB, ioIO, CJU, or other similar designs.  I've built and used them all for satellite contacts.  There are several good, home made Arrow-style antenna projects available from a web search. 

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KA4NMA
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Posts: 320




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« Reply #10 on: July 02, 2013, 08:09:01 PM »

Do you have any links for those antenna's?  I am disabled and economically challenged.  Any old antenna's would be appreciated.

Randy
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KQ6EA
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« Reply #11 on: July 02, 2013, 09:11:33 PM »

https://www.google.com/
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W5PFG
Member

Posts: 74




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« Reply #12 on: July 03, 2013, 11:19:18 AM »

Do you have any links for those antenna's?  I am disabled and economically challenged.  Any old antenna's would be appreciated.

http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

http://personales.ya.com/ea4cax/paginaea4cyq/Antenaioio/ioioingles.pdf
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