Radio W4KAZ Thanks for stopping by the virtual KazShack. Feel free to comment - I often approve them.
|
By w4kaz, created on 2007.10.19 at 10:10:36 | last changed on 2007.10.19 at 10:10:36 | Wow, the relocated, refitted, and repaired 40m and 80m antennas really sound a lot better than before.
The 80m folded dipole is also now almost perfect from an SWR standpoint. It is under 2:1 from 3550kc thru 3850kc, and the rig’s autotuner can easily match it across the rest of the band. The low SWR sweet spot is about 150kc wide, and centered on 3700kc. This antenna was constructed per cookbook dimensions from the ARRL Antenna book’s chapter on ‘portable’ antennas.
I’ve also worked out a switching arrangement for 20m and 160m, which both require an antenna tuner. 20m is a ladder line fed dipole, and the 160m antenna is a 160 foot long inverted-L with about 70 feet vertical. I have the inv-L routed through my jumbo homebrew tuner to an MN-2000, and the 20m direct to the MN-2000 through a balun.
I expect to add a 20m vertical soon, for a just-in-case backup/alternative. I also expect to find a way to incorporate a homebrew antenna switch to reduce the number of feed lines snaking through the yard into the basement.
But Biological Antenna Supports are still holding on to their leaves, so I have many hours of maintenance ahead.
By w4kaz, created on 2007.10.19 at 09:50:49 | last changed on 2007.10.19 at 10:12:12 | Sweepstakes 2007 is right around the corner. The CW portion is from 2100Z, Nov 3 to 0300Z, Nov 5. I have not been operating enough CW to be prepared this year, but there is still some time for me to practice. I’m relegated to S&P on CW, because I’m just not proficient enough to try to run stations. We’ll see.
If anyone is interested,there is now a drop down menu item on the PVRC Home Page which has several interesting links to Sweepstakes advice. These articles are in various formats, and anyone is welcome and encouraged to visit the pages. These are all great reads, with lots of ideas and tips.
Included among them is a link to an N6BV Hamvention presentation in which Dean provides an interesting group of maps and charts relating to Sweepstakes 2005. I think this is great planning information.
By w4kaz, created on 2007.10.15 at 20:58:07 | last changed on 2007.10.15 at 20:58:07 | Easy come, easy go. The loss to Kentucky was really tough, but Kentucky just played a better game, made fewer mistakes, and lasted longer. I expect those guys have a good shot at winning their division. Our guys were just not playing as well as the needed to to beat an underrated Kentucky team.
Good luck against Florida. 😮
We’ve still got a few more grudge matches ahead, with Auburn, Alabama, and Arkansas yet to be met. Ick. The parity in college football has made the game much more interesting. Its far more interesting than professional ball post free agency.
By w4kaz, created on 2007.10.14 at 19:51:16 | last changed on 2007.10.14 at 19:52:20 | I had a few minutes to spent playing around with the new antennas, just listening around. The guys calling CQ for the Pennsylvania QP were booming in here on 40m during the afternoon. The 40m dipole really seems to be hearing well.
On 80m, the new antenna was showing a very high noise level across the band, and it sounded similar to the AGC pumping from a strong nearby station.
“Hmmmmm…” thinks w4kaz, eyes vacant and scratching head idly.
Turns out my 80m antenna is now flat broadside to the WPTF 50KW antennas that are about one mile to my NNE. I have an 80m bandpass filter I built a couple of years back. Plugging that into the line cleared up the WPTF problem, dropping the broadcast QRM from S7 to S0. Its still there, but its very low level now. Not many signals on in the afternoon, so I need to carve out some time to spend in the shack playing around some.
Lesson: 50 KW at less than one mile distance is undesirable. (Yeah Homer, I know….doe-OH!)
By w4kaz, created on 2007.10.13 at 18:00:04 | last changed on 2007.10.13 at 09:29:23 | I spent much of the day tugging on lines and shooting new lines up into the trees. We had a really blustery day back in the late spring that knocked a lot of the weaker branches out of the trees. As luck would have it, one of those smacked the 80 meter folded dipole, snapping the light cord I was using to hold it up.
That was a bit of a problem. The line I had placed for 80 meters was probably 80 feet up, although the antenna was only up at about 50 feet. With the leaves already back on the trees, I couldn’t shoot a line back to the same spot, which would have been my first reaction to the problem. Instead, it forced me to think a little harder. (Queue soundtrack of rusty hinges squealing….) How best to make lemonade from the lemons?
Continue reading Biological Antenna Support Structures
By w4kaz, created on 2007.10.11 at 09:47:15 | last changed on 2007.10.11 at 09:48:43 | Sometimes I’m amazed at the quality of the information available on the internet. Sometimes I find it odd that I can’t find anything about a subject.
This is a case of the first. I saw a post somewhere that referred to the Western Union wire splice. I don’t have the formal electronics education that so many hams do, so I had never heard that term, although I’ve ‘discovered’ the method on my own while tinkering. But the search term ‘western union splice’ turned up a whole pile of interesting websites that illustrate some very basic how-to’s.
So now I see I need a new page to begin documenting some of this sort of thing. In the meantime, NASA has a good online document on basic workmanship standards that is focused on useful info and also fairly wide in scope. The illustrations could be a bit larger, but they are comprehensive, and even recognize the dead bug technique.
There’s also a scanned document from 1926 available that shows many of these techniques are not new.
More to come when the WX is not so pretty outside. My yard work beckons.
By w4kaz, created on 2007.10.10 at 20:53:49 | last changed on 2007.10.10 at 20:53:49 | Scot, K9JY populated his blog for the month of September with a contesting ‘tip-O-the-day’. It makes for interesting reading and its a really good summary of contesting tips for someone new to radiosport/contesting. He’s pulled the list together as “30 Ham Radio Contesting Tips”. Heartily recommended for one and all.
By w4kaz, created on 2007.10.06 at 16:31:47 | last changed on 2007.10.06 at 16:32:28 | Well, its not especially impressive, but the ARRL DX SSB multi-single at NT4D made it into the top ten box for US multi singles. Since we didn’t really put in an exceptional effort, this is pretty good. We are agreed that we probably could have easily done better, but we took a less serious approach to the contest intending to have fun and learn few things. Conditions on Saturday morning discouraged me from running on 15 or 20 meters, as I was not serious enough to want to dig into the QRN for the weak ones. Jay feels like he could easily have done better on 40 and 80 meters. Once we get Jerry comfortable with running stations, I think we’ll be in good shape.
Anyway, its nice to be in the results box, even if its at the bottom.
By w4kaz, created on 2007.10.01 at 18:57:14 | last changed on 2007.10.02 at 20:45:28 | edited 10/02/2007, kaz
A couple of things made me curious enough to wonder what a plot of 10 meter QSO’s versus sunspot numbers would look like. So I gathered QSO data from W3LPL’s ARRL DX contests as posted to the 3830 reflector. Frank posted the QSO breakdown by band, which is what I wanted. The result is no surprise, but I found it interesting anyway. The results may appear in some future edition of the PVRC newsletter.
I have also put the article up as a static page on my website. This has the original article with a bit of supplemental information.
Continue reading QSO’s vs Sunspots
By w4kaz, created on 2007.09.26 at 17:00:00 | last changed on 2008.03.20 at 17:28:02 | I don’t usually adopt software on its immediate release, but I was planning to upgrade the blog software anyway, so the new version arrived at the appropriate point in time. So far everything appears to be good to go.
update#1: I’ve also opened the comments up, since it appears there are three or four people making regular visits. Feel free to chatter away.
update#2 :Whoops–having a problem with the sub domain. I can access the blog as w4kaz.com/qth but not as qth.w4kaz.com. Hmmmm.
update#3: Thursday, 20070927: Still having a sub domain problem. Its better-sorta. The sub domain is redirecting to the home directory now instead of just barfing. I scratch my scalp and ponder. Perhaps in the fullness of time, I shall grok.
Update#4: Tursday 20080308: Still a problem.
|
|
