AJ4TW Live Logbook

Thursday, December 2, 2010

Well, I've moved to a new QTH, long gone are the big antennas hanging high in the pine trees. Now my HF station at home is connected to a short 44ft doublet that is in the attic, and I have a tarheel II on my car. So, if your hearing me then it is most likely on one of those antennas. I'll tell you I really miss those big tall pine trees and all that open space at the old QTH. Hopefully one day before too long we'll get back to a home where we can have some space to operate from.

I've been operating VHF/UHF a lot since the station is so limited at home. Dstar has been fun, but there really is no replacement for HF.

Saturday, October 16, 2010


Well, still enjoying Dstar very much. I've got to say it's spoiled me. Love the digital voice. I have been playing on HF from the mobile as well, Right now the little TDi is my only hamshack. I'm still using the DPRS tracker with my homebrew interface. The map to the right is packets reported to the AK4EG B repeater, these are packets reported to it in October only as of 10/16. The map on the left is Position reports recieved by the AK4EG C repeater during October 2010 as of 10/16.
Just above you see my personal position reports in the last seven days, these are all the reports from my mobile that simultaneously sends my position information with my voice audio. You can explore this more at APRS.FI
Cheers, 73 good DX and GL OM
AJ4TW

Friday, August 27, 2010

A week with DPRS

Well, it's been one week so far, and I've really made some tracks. It's actually quite impressive when you look at it graphically. One thing that strikes me when I see these plots of my Digital Position Reports is that every red dot represents a transmission in which I was received by a Dstar repeater, probably 95% have been the AK4EG B port, 444.8875, I have also been heard by the AK4EG C port, and the KI4WXS C port a few times. NC is blessed with some outstanding Dstar repeater systems, we have continuous Dstar coverage for almost the full length of I-85 through our state, in most places the corridor is covered by multiple systems. Here is a compilation of all of my reports for the past 7 days:



It is actually a little funny It looks as if I've been obsessively continuously transmitting in some areas, but really those dots all lined up are an accumulation that has happened over the past week of commuting and running errands, basically normal QSO's that I've been having on a daily basis anyway, but have just not been recorded until now.

Another thing that I've recently realized is that listening to the DV mode will spoil you. After having the ID-880 for a week in the car and using Dstar systems heavily I have become very accustomed to hearing clear clean audio coming from my radio. We switched around a bit this morning to some FM repeaters and it's just lost it's luster. I mean, I'm telling you the truth, try it! If you give Digital Voice a real chance you'll become attached to it as well, and you won't want to go back!

Saturday, August 21, 2010

Here are my DPRS tracks from the first two days of having the GPS receiver mated with my ID-880. It works pretty well, and it's been lots of fun. What you see here are all hits heard by the AK4EG B port, that's UHF, repeater(444.8875). You can see that the repeater has a fairly large footprint. You can kinda build a bit of a coverage map for a repeater by looking at the repeater at www.aprs.fi and looking at all the reports gated through that entity, unfortunately the aprs.fi site only keeps one month at a time.
Here is a screen shot of the gated reports so far from 8/10:

Most of the Dstar radios do have DPRS (Digital Position reporting system) capabilities. It is fairly inexpensive to get yourself a GPS reciever and build an interface for the radio, can be done for under $100. It's been a lot of fun to play with so far, and I'm looking forward to seeing more of the Data from my commuting next week! You should try it too!
73
AJ4TW
Got the tracker up and running in the car. You can see my location and tracks by going to www.aprs.fi and searching for my call sign, AJ4TW.

The ID-880 came in from Gigaparts yesterday just in time for the weekend, they sent me a new replacement radio. Good job Gigaparts!

See Ya!
73

Wednesday, August 18, 2010

Got word back today from Gigaparts, they received the radio today and are shipping the replacement radio out to me right away. I am very satisfied with their prompt attention and good service. It is nice to see that some businesses still care about their customers, it seems more and more rare these days that a retail type business knows the proper way to treat their customers. Thanks to Brandon and the rest of the guys at Gigaparts! Looking forward to seeing that ID-880 back in it's proper place on my dashboard!

Catch ya later!
73
AJ4TW

Sunday, August 15, 2010



Well, we got the interface box made to run the GPS on the ID-880. Don WD4CWE made the connections and put it all together, I just showed up with the parts and the plan. It works! I had to send my 880 back because there was a problem with the UHF finals, so I won't have it back until next week. Thanks to the guys a Gigaparts for working with me on that one, I hope to get it back really quick!

Anyway, here are some pictures from building the interface box, what it does is insert the 5v power for the GPS and allow the GPS to talk to the Icom programming cable:






Here you can see all of the parts that I got together to get the thing made total cost of $8.50 or so at radio shack.


This is the 5v voltage regulator transistor.




Here are some final assembly internal photos.
















Feel free to contact me if you have any questions about Connecting your ID-880 to a GPS reciever, I'll be happy to try and help out if I can!