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Archive for January, 2009

Trashing The Old

January 24th, 2009 NT7S 1 comment

I’m going to veer off my normal blog fare a bit and get into a topic which might be slightly controversial, but has been buzzing around the ham blogosphere lately. I make it a personal goal to not delve into political topics in my ham radio activities, but I’ve been finding this increasingly hard given that current political events have seeped into virtually every ham blog that I read. So I will fully admit that I’m a flawed man, and I’m going to break my own rule this time. Relatively speaking, my place in the ham blogosphere is as a plankton next to the ham radio minnows that are the big boys in our corner of the Internet sea. I know that this is probably an exercise in futility and might drive off a portion of the small number of readers that I have. Sometimes, you just have to speak out if you think your community is going off the tracks. I’ve had no epiphany, just an increasing desire to put out a counterpoint to a meme which is picking up steam in our community.

A good portion of the ham blog intelligentsia have been riding the currently popular “change” meme right through our isolated little corner of the net. There’s been a lot of rhetoric about how we need to turn our backs on our past, discard nostalgia, and make the great leap forward into the future. The theory is that all of the old farts pining for the “good ol’ days” is driving away much of the new blood needed to revitalize the hobby. It is claimed that if we fail to make this fundamental change in our focus, ham radio will wither and die.

I will be the first to admit that there are two very unappealing aspects of ham radio for me: the cranky curmudgeons and the whacker brigade. The first group seems to have taken up a second home on the Internet when not on 75 meters, berating all lesser beings and regaling the rest of us mere mortals with their tales of heroics. The latter group pretty much speaks for themselves. Every time I tried to get involved with EMCOMM (before I became wise to the realities of that world), I came away severely discouraged about the clique mentality and the lofty goals coupled with the laziness of the majority of members. That said, most of the hams that I have met do not fit into these categories. Sure there are plenty of nutjobs in our hobby, but show me one hobby (especally a geeky one like ours) that doesn’t have their share of cranks.

The question is then whether abandoning our history is going to change these aspects of our hobby for the better. No, it’s not. The two have nothing to do with each other. Yes, the curmudgeons invoke The Past as it were the golden age which we will never obtain again. Does that make the past inherently bad? Of course not. Nostalgia in itself is not a bad thing or a good thing, it just is. It has its place in reminding us where we came from and what makes our hobby a special thing. As with just about anything else in life, it can be used postitively or negatively.

One problem is the growing number of people in our culture who want to banish something because they don’t like the negative aspects of that thing. Part of being a responsible adult is recognizing that when you have the freedom to do something, you have to accept the good and bad aspects of that activity and deal with them accordingly. I don’t need someone to decide what’s best for me, and I suspect that you don’t either. The last thing we need is some kind of reality bubble to eliminate the things that make us uncomfortable.

Another thing that bothers me is the nebulous aspect of this desire for a shake-up in the hobby. There seem to be no concrete proposals for how to improve things, other than sending our past down the memory hole. Change simply for the the sake of change, in any endeavor, is insane. I’m not on board the change bandwagon. Too many incredibly destructive and stupid things have been done in this world in the name of progress.

If something works, you don’t just throw it out because it is old. What is wrong with enjoying something just because you enjoy it? You always hear about non-hams who ask hams why we use amateur radio, when we could just pick up a cell phone. The answer, of course, is that we do it because we enjoy it, not because it is superior. Why go fishing when you can just buy a fish at the supermarket? Same principle. It seems that we lose sight of this concept in our own little ham radio subgroups. So what if you think CW is the only true mode. What does it matter if you think life is too short for QRP? Who cares if you don’t like boatanchors and AM? There are plenty of hams who do, and they should be able to pursue their interests as long as it stays within the rules. I’m sure that for each ham who likes a particular aspect of amateur radio, there are plenty of others who hate it and want it to go away. If there’s anything this hobby needs, it’s more of the live and let live attitude.

There is another reason why we shouldn’t just throw away our past. Recall the old maxim: KISS. Many times, the simplest solution is also the best. Just because a technology is old does not make it inferior. I won’t belabor this point, since it has already been thoroughly covered in other places (especially with the CW aficionados). But we should not act like children with ADD, discarding the old because we like the new, shiny toy better.

Let’s get down to the bottom line. The magic of radio is reason that most of us are in the hobby. Sure, there are those who got a ticket because they are weather spotters, because their spouse has one, because someone at the ARRL told them 10 years ago that it was just as good as having a cell phone. However, the majority of us are into amateur radio because we like radio for radio’s sake.  The stories of our illustrious past remind us of this, which is why we enjoy them. Gutting our history will remove the soul of our hobby and take away that which makes us unique. Might as well just trade in our Elecraft K2s for Motorola TalkAbouts.

What we need is advancement of the radio art, not undefined change. There are areas where we are still making progress in developing the art, although not nearly as much as we used to. But how can we compete with the rapid development pace of the old days? We can’t. As with any nascent technology, radio was pioneered by the tinkerer and the amateur. But radio has now matured into a multi-billion dollar industry. There is no way that we can compete with the R&D resources that industry can pour into new product development. Most of the leading edge ham technology these days often comes from those who already work in the radio industry and have access to many resources that the average ham does not. This does not make us worthless, but we have to be honest about our place in the world of radio.

No, we are never going to live up to the glory days of our predecessors. No amount of progress will ever get us back to the same level as the commercial radio industry. But that’s OK; it means that we did our job, and that radio is one of the most successful and transformative technologies in the history of mankind. Wireless is becoming more and more important each day. We should take pride in knowing that we paved the way, and that we still have a link to that spirit of radio which brought us such wonderous inventions.

Categories: Ham Culture Tags: , ,

WorldRadio Online Debut

January 21st, 2009 NT7S No comments

I just saw (via the Southgate Amateur Radio Club feed) that the first edition of WorldRadio Online has been released. I’ve made a quick scan of it, and my initial thoughts are that I’m impressed. Right off the bat, you notice that it looks better. The same general format is carried over, but it’s in color and looks much better than the crummy cheap newsprint version. It appears that all of the same content and regular columns are pretty much still in place. I’m not a subscriber, so I’m not 100% sure of that, but I would get my teaser copy about every 6 months, so I do have some idea.

They also appear to still have all of the advertisments, which in my opinion is great. If they can get the sponsors to continue to pay for advertisments, while keeping the publication free, that would be a great step forward for ham radio publications. I am curious how they are going to change their ad pricing structure, since all of the traditional readership metrics have to be tossed out the door with online distribution.

One interesting change is that the QRP column has been reappropriated to now focus on trail friendly radio. I’m curious what the impetus was for this shift, but it should still be interesting. The regular columnist, KI6SN, has even setup up a new blog to compliment his revamped column.

I’m pleased to see that WorldRadio seems to be carrying on with the same level of professionalism as before. This shift in the distribution model could be healthy for the hobby (*ahem* QST *ahem*), but only time will tell if this is sustainable or not.

Categories: Ham Culture Tags:

Non-Happenings at the NT7S Shack

January 20th, 2009 NT7S No comments

There are times in any creator’s life where the muse takes a temporary leave. This is one of those periods in my career. Part of the problem is my incredibly screwed up sleep schedule. Working 3rd shift is hard enough, but having a large amount of time off that allows you to drift back to a normal sleep schedule really messes with you. During my recent work furlough, I had a horrible bout of insomnia and ended up feeling less rested, not more. Now I’m back to trying to adjust to my normal schedule and not having a very good time of it.

As a result, not much has been happening on the homebrewing front. I’ve got some a few different active projects going on, but haven’t been making great progress on them lately. I have a ton of cool (at least in my not-so-humble opinion) ideas floating around in my head, but it has been extremely hard for me to get the energy to execute them. I’m too damn tired at the end of the day to do much of anything ham radio related or anything else that requires thinking and concentration. However, I’m still having a hard time getting the rest I need. So I have been ending up doing a lot of reading, both Dead Tree and Internet. I’ve also been letting my e-mails slide again, and I sincerely apologize for anyone who has written me that I haven’t responded to yet. Please send me another mail to give me a needed kick in the butt.

The bottom line is that I humbly ask you to bear with me as I work this out. My blog posting will probably continue to be a bit more scarce than normal for a while longer. Don’t worry, I’m not going to allow the blog to fade. This place is like my journal and notebook in a sense…I make it public in order to share the information but it’s also here for somewhat selfish reasons. I’m not going to let it get neglected. Rest assured that I have some interesting homebrewing information to share with you as soon as I can recapture my energy and spirit.

Categories: Random Musings Tags:

Some Ham Video Goodness

January 13th, 2009 NT7S 1 comment

On qrp-l.org and Twitter, I’ve had the pleasure of running across Jeremy Chase, N1JER. He’s just getting into operating HF CW, kitbuilding, and homebrewing, and it’s always a treat to get the perspective of a younger guy who is just getting into ham radio. I guess I’m interested because there’s not a ton of us in the under-40 crowd getting into ham radio. Anyway, Jeremy has been having a lot of fun learning this stuff, and has been cool enough to make some videos documenting his progress. I’ve embedded a few of them below for your viewing pleasure. Be sure to check out his blog for more interesting stuff. A little birdie told me that more videos might be on the way!

Categories: Cool Stuff, Ham Culture Tags: ,

Caddock Dummy Load Performance

January 11th, 2009 NT7S 3 comments

A few days ago, I built myself a simple 30 W dummy load out of Caddock power resistors. As I mentioned in the previous post, I was doubtful about the readings that I was getting from my LP-100 (not that I doubted the LP-100 itself, just my calibration of it). Tonight was my first night back to work after a long break, and I finally got a chance to put the dummy load on a calibrated VNA to verify its performance.

The instrument that I used was an Agilent N5230A. A very nice instrument, but one minor drawback is that its lower frequency limit is 10 MHz. Not to worry, as I suspect that if it does well from 10 to 30 MHz, that the lower bands are probably good enough for my home lab.

Caddock 30W Dummy Load - S11 Plot

Caddock 30 Watt Dummy Load - S11 Plot

Caddock 30W Dummy Load - SWR Plot

Caddock 30 Watt Dummy Load - SWR Plot

Caddock 30W Dummy Load - Smith Chart

Caddock 30 Watt Dummy Load - Smith Chart

Sure enough, it turns out that the performance of the dummy load is great and that my LP-100 calibration is off. The return loss is excellent all the way up to the 2 meter band. There’s not much else to say since the plots speak for themselves. If you need a dummy load, you could definitely do worse than to pick up a couple of these resistors on your next Digi-Key order and slap one of these together in a few minutes. Caddock also makes 100 W resistors, which will probably be on my next order for goodies.

Categories: Homebrewing Tags: ,

Lessons Learned Today

January 8th, 2009 NT7S No comments
  1. You can never have enough low frequency decoupling in an audio amplifier with 100 dB voltage gain.
  2. You can never have enough voltage regulation on the VXO you are using to feed your diode mixer. Not enough and you get all kinds of nasty low frequency oscillations in the receiver.
Categories: Design, Homebrewing Tags: , ,

30 Watt Dummy Load

January 8th, 2009 NT7S No comments
30 Watt Dummy Load

30 Watt Homebrew Dummy Load

First off, I want to apologize for the sparse updating on the blog lately. The muse has not been my friend in the last few weeks. I try to keep the content mostly original, but perhaps I will have to turn to that time honored blog tradition of short blog posts repeating something cool I heard on the Internet.

Anyway, on to the good stuff. I remembered in my last Digi-Key order to grab two 100 Ω Caddock power resistors (MP930-100-1%) to make simple dummy load. These were mentioned in a QRP Quarterly article a little while ago as a great non-inductive resistor to use for RF dummy load applications. The datasheet looked good and the price was cheap ($3.51/piece), so I figured I would give ‘em a try when I got a few spare moments.

30 Watt Dummy Load

Dummy Load Close-Up

I wasn’t sure what kind of heat sinking was needed, so I used my most scientific method and took a wild guess. The resistors (in TO-220 packages with a ceramic contact pad) were mounted to a piece of copper clad measuring 2″ x 4″. A bit of thermal grease was smeared on the copper clad before mounting the resistors with 4-40 machine screws. I mounted the resistors so that one lead could be soldered directly to the center pin of the BNC bulkhead connector, while the other lead was soldered to the copper clad ground plane. I figured this should minimize stray inductance.

I gave the dummy load a test drive on the IC-718 set for 30 watts power output. A keydown period of 30 seconds showed a nice SWR on the the rig meter, although my LP-100 showed a reading of about 1.8. The dummy load was fairly warm, but could be handled. I wouldn’t want to key it for much longer at that power level, but I bet it could handle <20 watts quite easily. I expected to see a reading of nearly 50 Ω purely resistive on the LP-100, but surprisingly there was a fair amount of inductive reactance (hence the SWR of 1.8). Now I’m a bit doubtful that I’ve calibrated my LP-100 correctly since I wouldn’t expect such such a lousy reading. I’m going to wait to declare the LP-100 reading bad until I can get the dummy load on a calibrated VNA to make sure that it doesn’t really have this problem. Stay tuned for VNA measurements on the dummy load when I am able to make them.

Categories: Homebrewing Tags: , ,

Ringing in the New Year with K3Y/7

January 1st, 2009 NT7S No comments

Over the course of the New Year rollover here in Beaverton, I had the opportunity to operate SKCC special event station K3Y/7, which celebrates the 3rd anniversary of the manual key operation group. I had a great time operating, but I found the band conditions to be challenging. In the course of 4 hours (probably 3 hours of actual operating time), I only made 9 complete QSOs. The QSB was brutal tonight; I missed completing QSOs with a fair number of stations because of it. If I couldn’t hear you better than 559 on the peaks, I had a very tough time getting all of the required information.

My favorite QSO had to be the one with WA6NPC. He proudly told me his key was strapped to the arm of his rocking chair and he was rocking chair mobile. He was also quite prepared for the holidays with an ample supply of fruitcake. FB Bill!

I don’t know why, but I got some real jittery nerves on the key tonight. I was receiving OK, but had moments when I was transmitting when my brain just stopped converting text to Morse Code. How embarrassing. My apologies to anyone who had to suffer through that. I will have the callsign for at least two more operating periods (3 Jan 2200-2359 UTC and 10 Jan 0400-0559 UTC), so I hope to have a better QSO rate in my next attempts. Thanks to everyone who worked me, I hope you all had a great Straight Key Night.

Categories: Operating Tags: ,