Showing posts with label Arrow Antenna. Show all posts
Showing posts with label Arrow Antenna. Show all posts

Thursday, September 15, 2011

Satellite Antenna Mount


My Dad found me two telescope tripods with mounts on them. I wanted to modify one of these to hold my Arrow Antenna, so I could set it up, track a satellite and not have to hold it. Here is the result:



Basically, I took off the actual mount for the telescope off, by taking off the main nut on the mount. After a cleanup, I found a hole with a long bolt. I took 1/2 inch copper tubing, put a 1/2 coupler on the end, and modified some plastic spacers to create a tight fit onto the mount. Then I used crazy glue to seal the copper tube to the mount. Next, I found a long bolt, and put a bunch of metal pipes as weight on it to counter the weight of the antenna. Now, I can set my elevation (Inverted from the scale on the mount), and starting azimuth (Using a compass on the lens tray), and not be as busy while working a satellite pass.

TIP: Make sure the copper tube you push into the Arrow Antenna Frame is soft, or sanded just a little bit. This will allow you to adjust your polarization without messing with the direction

Now, I can put my iPhone on the mount instead of the antenna to see where I am pointed.

Monday, April 25, 2011

Satellite Contacts with Arrow Antenna




About a month ago, I spotted a deal when I happened to have a little extra cash. I found an Arrow Antenna with the 10w Duplexer used for $95. Used was relative, as it was only outside 3 times, and owned by a reliable local ham, so it may as well have been new. I made a jump on it, as I had been wanting to try Satellite for a while.

I researched between the Arrow Antenna and the Elk Antenna, and found the Arrow has a bit more gain, and works better at the lower elevations. I liked the Elk design because it wasn't crossed like the Arrow, but I like performance and gain better.

I did some research and watched a few YouTube videos to learn how to use the satellites. I built a frequency table for the Doppler shift, and programmed 5 memories per satellite. I found that I could program the input of the satellite as an odd split on the memories on my Yeasu VX-7R, effectively a cross band memory.

I initially brought my new antenna into work to show another Ham. He wasn't in that day, but my antenna started a discussion with my co-workers. That also lead to tracking my first satellite. After listening to a few passes, I realized there was no way I could track a satellite, tune the radio, and write down contact info at the same time. I was tracking the satellites with a piece of software on my iPhone already, so I started using the Voice Memo to record the QSOs. Now I have successfully worked nearly 30 QSOs, across 4 satellites. I have yet to be able to use SO-67 yet, as it is in testing. As for the ISS, I have only locked onto it to listen to the APRS packets, no QSOs, yet.


Here is a list of my contacts I have made. I will get some QSL Cards ordered and start sending them out.

In my limited experience, AO-51 (Echo) is easy to use, but many users. AO-27 is not as heavily used, and easier to track across the sky, as it seems to transmit with a bit more power. SO-50 is more diffucult, as it doesn't transmit a carrier when nobody is transmitting, and it can be a little weak.
Hope to catch you on one of my "Sat Breaks", as opposed to "Smoke Breaks".
73
KI6PSP
DM15