Radio W4KAZ

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Vetex Radio Repair Service

Well known contester W4MYA announced the availability of a new radio repair service. Bob and George, KF7NN, have teamed up to form Vetex to provide radio repair services to licensed amateurs’ equipment.

That’s going to be a real convenience. Goochland is only about three hours up the road. UPS ground in one day from here.

S&P vs Running

Ed, N4EMG stirred the mental pot with his recent post about S&P contesting. Since I really have not met a lot of contesters that prefer S&P to running stations, it is difficult to address some of the questions Ed raises.

As luck would have it, contesting S&P with modest antennas is almost the only sort of contesting experience I have. Only in the last year have I begun to mix in runs with my more typical S&P operating. A quick glance at my scores by year page show only a couple of contests with 500+ QSO’s. 2006 Sweeps is a good sample of my best mostly S&P effort. It’s also one of the few contests I have kept my BIC for most of the duration.

Beyond that, there is not a lot of information you can use as a comparison. Unless you know the type of station someone uses, it is difficult to make comparisons. Even then, the differences in geographic location, amount of time operated in the contest, antenna height and quality, and operator skill level all come into play. Operator skill level is a tremendous factor. A good operator will run rings around a less experienced op. “Butt In Chair” factor is therefore not limited to the current contest, but is also a cumulative factor. There is no substitute for experience, and that is not unique to contesting.

Contesters seem to migrate away from all S&P fairly rapidly. Many begin that way when first discovering radiosport, although I suppose some jump in and start running right away. Folks come to the point where they realize(as Ed has) that running is the best way to increase rate. Some of the good operators will do all S&P when they are time limited, but even then most folks seem to prefer running. So the data on “all S&P” operating would be further limited if it were available at all.

Power level matters. Running with low power is a challenge. But if you want proof that good scores can be done successfully with low power and modest antennas, I’d refer anyone to look up some of the scores posted by N4YDU. Nate is a run operator, S&P’ing less often, but he is a great op and can rack up QSO’s. He has operated HP a few times, but most of his scores are in the LP category. There are also no tall towers at N4YDU. Nate has a tri-bander at about 30 feet, and a lot of various wire antennas. “Various wire antennas” because Nate likes to try out different things, including dipoles, doublets, loops, half squares, etc.

For low power, CW is the mode to concentrate on. A LP op will have more punch on CW, and better luck holding a run. But don’t expect to be able to hold a run forever with LP and modest wire antennas. There are a lot of HP stations that will see you spotted and squat only 100hz above you to poach your run fq. There are some who won’t even allow the dignity of the 100hz offset. (I have a name for those sort, but it is not suitable for refined company;) Sometimes it is worth dueling, sometimes it is just time to move along.

I personally enjoy S&P operating more than running stations. S&P is fun because it keeps me focused. My best single hour rates are just under 60 QSOS/hr on SSB, and 49 Qsos/hr on CW. The ten minute rate can and does often go higher, but I find it hard to tune, copy, and dupe check much faster than that. Better ops can S&P at higher rates, but their time is better spent running. This is probably why So2R has appeal. When runs slow down the second radio keeps one from dying of boredom in a rate productive manner. Reading a magazine seldom translates into QSOs.

I also find that rate is easier on SSB, when conditions are good. Better CW ops may find just the opposite. Probably everyone would agree that good conditions make S&P a real blast. Except for those that hate S&P.

S&P is really fun when three or four bands are open at the same time. 10m is also fun when it opens. On 10m SSB the bandwidth is so large that by the time you have finished the first S&P pass across the band and start a second pass, all of the run stations might be new ones. That is fun, and I sure hope it happens again. The sooner the better!

Other ways to improve S&P rate are by using packet spots and making use of the temporary memories, if your logging software supports them. I use the memories for those juicy mults/DX. Writelog has three. I generally load two stations needed in the first two memories, and the current frequency into the last. Then I can toggle back and forth between then using mouse clicks as if they were spots.

Even when not connected to packet, using the band map window to load Q’s is useful. By loading a station into the band map, I get to see a “preview” of who might be there when I scan through the second and third times.

A lot of the QRP and LP stations have good antenna systems. QRP is a challenge of a different sort for them. Great antennas are better than QRO, because they work on receive too.

Just some ideas, some of which you already have probably either used or seen elsewhere before. However you choose to do it, concentrate on the fun first. That’s the motivator for everything else.

K2 Impressions – Part 10 – Kazmo’s Kustom Kreations

A Cool Accessory – aka Outboard Heat Management Project

The first extended period of use for the K2 came about during Field Day 2008. The top panel of a K2/100 is essentially one big heat sink. It soon became obvious the the K2 gets quite warm under continuous use – like when calling CQ endlessly for Field Day. The temporary FD solution was to re-position the fan to cover both the K2 and the operator.

Ten-Tec has a 12v external fan accessory, but it seemed like a good project to fill in the “waiting for family to get ready….” time.

I located a 3×6 heat sink that had been recovered from a dead computer CPU. As luck had it the heat sink had two parallel ridges along the bottom. Even luckier still, these ridges aligned well enough with the top of the K2 heat sink that it more or less “snapped on” to the top of the K2. The extra heat sink alone cooled the K2 a lot.  But a fan would help.

Having a couple of four inch pie fans in the junk box, also recovered from computers, I was on my way to a ten minute project.  Adding a couple of 5 inch rails cut from aluminum angle stock, a few nuts and bolts, and a dab of “JB Weld” epoxy, we get a nice heat sink/fan mash up. The K2 is now cool as ice. Functional – not esthetic!

Top view of the Fan/heat sinkTop view of the Fan/heat sink

Briefly, the fan is bolted to the aluminum angle. The angle is then epoxied to top of the the external heat 3×6 sink. A resistor is in-line to drop the fan speed by about half. The fan used is rated at 12v and 0.29 amps. Gathering a few half watt resistors, I came up with a 75 ohm 2 watt resistor. Putting the resistor in-line slowed the fan down and cut the fan noise completely. It still pushes plenty of air through the external heat sink. 75 ohms seemed to be the magic value needed to reduce the rpm’s “just enough”.  Even very slightly higher resistance values cut the fan off completely. The whole fan mash up still is a snap-on, snap-off accessory – nothing changed on the K2.

Heat Sink - SideHeat Sink – Side Ready for CoolingReady for Cooling

? Custom Knobbery ?

There is lots of chatter over the years on the Elecraft mail list about a good replacement knob for K2. The stock knob is fine, but a slightly larger knob seems to work more to my personal tastes. The knob installed is from a Yaesu FT-840.

K2 customizedK2 customized

The stock 840 knob has a plastic skirt, which can be seen in this RigPix photo. With the skirt left on the knob the display is obscured so it has been removed before installation on the K2. It appeared to have been held on it only a few drops of glue, so it could easily be re-installed later. That’s not an issue in this case, since the FT840 was involved in an unfortunate incident during a thunderstorm. 😮

The FT-840 knob is a perfect match to the Elecraft. It has a good feel, the tuning rate is slightly slower, and it even comes with its own “dimple”. Perfect. The 840 had a long shelf life, so this knob may be stocked for a while yet.

This knob would also be an improvement on the K3. I found the tuning on the K3 similar to the stock K2.

-more- at the K2 Impressions page

Engineer The Possible

Engineer the possible. The “best” is too often the enemy of “good enough”.  If you wait until you have “The Best”, you may miss out on a lot of operating.    Better to aim for “the best POSSIBLE”, i.e., what can be accomplished within the constraints of resources and time frame available.

The recently completed W4KAZ SO2R box is going to be something “New” in the KazShack. But the choices made in building it are all “old” technology. It is a case of engineering the possible.

This has been a project that I have flipped and flopped on. The choice made was based on practicality rather than “the best” approach. The best approach would have been to utilize a new computer and the USB rather than the LPT port. That choice implies using some of the newer CW keying technologies(Winkeyer or Microham). O’course, that would also entail blowing a couple of thousand dollars on the new off-the-shelf hardware, none of which is currently on hand. This approach I characterize as “New Hotness”, per Agent K from MIB. So, where do I get a couple thousand dollars I can divert to this frivolity? (Answer: convince Number One Son to join the Navy rather than go to college? Didn’t work…)

The alternative is to see what can be accomplished using “Old and Busted”.

It turns out that practically speaking, “Old and Busted” is perfectly serviceable, even if it is not quite so much fun as “New Hotness”. New Hotness certainly has an advantage in the effectiveness of generating the CW in a seperate piece of dedicated hardware. Nice, but not essential. New Hotness also uses current technology. Also nice, and also not essential.

The fact is that Old and Busted can be designed to competently and reliably perform the essential basic tasks required:

  • Key the CW
  • Control the radio TX focus
  • Provide the band data or pass it along
  • Be easily home brewed [!!!!!the most important criteria!!!!!]
  • Be easily modified as needed/wanted/for experimentation

Even better yet, “Old and Busted” can be cobbled together very inexpensively relative to New Hotness. For my own part, the cobbling together is tremendously more satisfying than waiting for the postman or UPS truck for delivery.

O’course, price is also a big factor. But I have not found any home brew solutions utilizing USB. A hybrid solution could be derived by using the PIEXX SO2RXLAT device to convert USB to LPT type data. That seems like a workable bridge between old SO2R hardware and new computer tech. Possibly not ideal, but very plausible, and very attractive for those with money already invested in LPT hardware.

So, “Old and Busted” wins. Since I don’t like N1MM logging software, I don’t NEED a better shack computer. I can get by with a clunky old Win 98 box running good ole Writelog. Relying on an old CPU could be a reliability issue, but old CPU’s are free for the taking, and I already have several backup boxes on hand. The old boxes all have LPT ports, which is the approach that seems simplest for home brew of an SO2R box. A single LPT port can be configured to carry the CW, PTT, radio A/B switching, and also carries the band data for one of the radios.

So, Old and Busted wins out, at least for now.

Besides, I just can’t get my head wrapped around “needing” the latest-n-greatest technology for CW contesting. Really? Because CW is so cutting edge? Really?

It may all be moot. I may get the whole kit assembled and decide I don’t want to operate SO2R after trying it out. By going the old an busted route I have at the very least learned a lot by cobbling together several design ideas into a custom solution. That hands on education has more value to me than the cost of the New Hotness hardware. So even if I put the new toys aside after light usage, I win.

Engineer the possible. If you wait until you have “The Best”, you may miss out on a lot of operating.

Wednesday Night Menu

Wooowee. Wednesday night brought forth a trip to “New Orleans Foods and Spirits”. Recommended by the XYL’s neice as her favorite place. She has good cause.

Menu Items chosen around the table:

  • Voo-doo crawfish stuffed rolls(appetizer)
  • Crawfish and corn soup
  • “Swomp” pasta
  • Crawfish Stew
  • Fried Shrimp salad
  • Fried Catfish Platter

The menu had all of the other normal South Loozyana favorites. But it is difficult to sample them all.

Easily the best food I have had in three years. The crawfish stew was one of the better versions I have had, like -ever. That covers quite a lot of crawfish stews consumed in the days of my yoot’. O’course, the taste buds have been little exposed to such edible tidbits over this past decade, so my judgement could be suffering from delicacy deprivation.

NC BBQ is good, but it just ain’t nowhere close to the type of flavor explosions one can find back in the swampy homeland. There’s just nothing like really fresh seafood when it is expertly prepared. Despite the name, the restaurant is actually in Covington – but then so are most of the restauranteurs from New Awlinz. Caint say I blame them, since I got out while the gittin’ wuz good.

Everything else was good too. I stole a chunk of catfish from the n umber two son, and “home brewed” one of the other menu items: Fried catfish smothered with Crawfish stew. That was food too.

The Voo-Doo rolls turned out to be similar to egg rolls. The stuffing consisted of crawfish in a cheese sauce, with what tasted like pimento and a touch of jalepeno pepper. Extra Yum.

Even the hush puppies were top notch. Light and fluffy, no greasy taste. Yum.

I washed the stew down with a nice glass of Abita Amber from the tap. A good everyday brew that complemented the spicyness of the stew.

Sooo-WeeeeT.

I only regret not trying their gumbo, something I normally use to guage restaurant quality. The award for all time restaurant-made best gumbo goes to Phil’s Oyster Bar in Baton Rouge. Theirs is even better than my own. Usually.

I wonder if Phil’s is still open? RoadTrip!

BL0G/M

This is pretty cool. The first completely mobile blog posting I’ve had chance to log. The eldest harmonic is putting his hard won driving skills to the test, and I get to play with his spanky new Toshiba Satellite laptop using the XYL’s wireless access thumb port. The connectivity fades in and out on the interstate, but it is better than dial-up. Almost better than my own personal home PC. It’s a real dinosaur, almost eight years iold, plus being maxed out with 512mb and running win XP.

Note to self: Learn how to disable this stinking touchpad! Too hard to type without touching it by accident!

Not too happy with the Vista look and feel neither. I’m not opposed to change if it adds value, But change simply for the sake of change is for malcontented idiots.

All irrelevant. Lots of shack projects, not much contesting. The Russian DX was lost to the smell of solder smoke in the shack. The vocal cords were still dysfunctional during CQ WPX SSB. So, only 17 QSO’s logged in both combined.

On the other hand, I’ve had a good run using the vacuous rainy winter hours productively out in the shack working on projects.

Goodies that need to be documented here in the log>

  1. K2 heat sink/fan project
  2. SO2R Box w/schematic
  3. Band Decoder w/schematic
  4. More Band Pass Filter Fever
  5. Antenna revisions & model
  6. Remoting antenna switches
  7. Incorporating SixPak
  8. K9AY control box re-build
  9. K9AY band splitter

That doesn’t include doing maintenance on antenna ropes out in the 80×100 antenna field. The 15m/10m antenna came down back in January, and the 160m L hit the ground sometimes in March. My afternoon of shooting new lines was very frustrating. A combination of difficult high shots and not enough patience worked against a high success rate. I managed to get two really good new ropes hung, and one necessary replacement.

The rope stringing also inspired a planned change to the antenna layout. I’ll see how that goes, but by moving the 15m and 10m antennas there should be room for an additional 40m antenna, placed at right angles to the NE/SW dipole. Maybe also another dipole for 20m at right angles to the existing 20m dipole. N4YDU seems to be having good results with his crossed dipoles, so it seems worth trying.

Lots of things to try to do, and so little time.

Remote Antenna Switches

A little look at some interesting remote switch projects.

Far Circuits has the KO4NR project from QST, April 05antenna switch project. It is the circuit board and a full set of the required Zettler relays(az755-1c-12DE). A six position remote switch for only $36 plus shipping. Not bad. It is listed under “Repeater, Controller, and Station Accessories”.

Also KK1L has a 2×6 switch project posted on his site. It uses the same Zettler relay as the KO2NR project. A quick look at the data sheet shows that the P&B relay RTE24012F or RT424012 has a pin layout similar enough to be substituted for the Zettler. The Zettler has a 20A rating(both poles) while the P&B is rated at 16A. Pricing is similar, and the 16A P&B is in wide use in full power stations. Boards are not currently available from KK1L, but he has the full schematics posted.  Here is an analysis of the switch by AC0C.

Lacking PCB etching supplies and skills, it might be possible to produce a usable board for the Ko4NR project using a dremel tool. My own home brew switch was constructed dead bug style. It shows losses on 15m and 10m. I have a couple more antenna problems begging to besolved with 2 or 3 position remote switches. I think I’ll take a swat at connecting the so239 jacks via home brewed stripline.  Here’s an online stripline calculator.

KK1L also has a nice SO2R home brew project.

TANSTAAFL

(Apologies to the foreign audience, this contains intentional mis-spelling and slang…)

First there was the E-vul Big Blue. Then the dred MyCrowsofft. E-vul Bigg Oyl. E-vul Bigg Pharma.

But with so many looking to get something for nothing these days, maybe Bigg GooG is positioned to be more hazardous in your day to day lives.. Use those apps with caution kiddo.

That is not to say there are no reasons to use any of the Bigg GooG apps. Rather, maybe take time to think on the ramifications of being hyjacked. If your use of a service is compromised, can any real damage be done? If the answer to that is “yes” or “maybe”, you should be hearing Robot in the background – “Danger Will Robinson…”

And yes, that applies to blog software. You DO look at the PHP code before installing it, don’t you? If you find a program/plugin with binary encoded data embedded within it, be wary.

For those who have never read Heinlein: TANSTAAFLThere Ain’t No Such Thing As A Free Lunch

LOTW – DXCC and WAS

I’ve been running an experiment of sorts with Logbook of the World. I was curious to see where the tipping point might be for getting enough LOTW confirmations to qualify for either the DXCC or WAS awards from the ARRL. Right now, I have 17,829 QSO’s uploaded to LOTW. That is a mixture of both Phone and CW. The other item – they are all contest QSO’s.

Of those, I have 5,789 confirmations via LOTW, or just a hair shy of 33% confirmed. I expect most of the confirmations are from US QSO’s, because it is not very easy for DX stations to participate.

Nothing too shocking there. I think I actually expected more LOTW confirmations from contesters, since their logging programs make it easy.

Anyway, I hit WAS sometime last summer. I’ve been waiting to get WAS on both CW and SSB before getting the certified wallpaper. The last holdout for WAS Phone was NV.

I expected DXCC to take longer. My DX capabilities are poor with no amp, no tower, and no beams. But DXCC happened sometimes between ARRL 160m for 2008 and the NAQP CW. My DXCC total now sits at 102 confirmed in LOTW. The CW and SSB mode totals are 70 and 90. I will probably wait until I hit those to milestones before buying the wallpaper. 17,000+ Q’s is one season of contesting for a top ten station, but it was a few years of operating from the KazShack.

There is a big wiff of “so what” to all of it, but it has been fun rounding them up. I’m not really big into chasing awards for their own sake. I’ve always felt that the logbook itself was the award, and with the logging programs available, it is easy to see the progress. But some decorations are ultimately worth having.

Now I really need to send reply’s to all of those in that box of paper QSL’s. That backlog is unforgivable.

Spotting Assistance?

Nope, no explosion of sunspots yet.

The current prediction graph is interesting. The graph of actual sunspot numbers is lagging behind both the “big cycle” and the “medium cycle” plots. But the graph of solar flux data shows an almost 1 to 1 correlation to the smaller cycle prediction. Peak of 80 in 2013? Ick.

For background here is the 2007 prediction.

Too bad. The big one sure would be more fun. But it’s all fuzzy science, so maybe King Sol will stir the pot a bit more for us. A couple million more years of observations, and maybe there will be a clear trend. But what if chaos reigns, and the patterns are temporal and more changeable than short term observations indicate? A moot question, but a curiosity nonetheless.