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Todays activity

I actually put the old 6 elem. logcell together for the upcoming 10m contest. Never expected that I would actually use it again and forgot to mark bits and pieces. But overall putting it together went smooth.  Unfortenately just when I was ready to get it up the small mast it there was a very heavy storm arriving with thunder, lightning, rain and hail. So, I hope to continue Saturday morning if weather and time alows. Some specs of this antenna. 4 elements fed, gain about 11dBi, front to back >30dB, front to side approx 25dB. Unfortenately I don’t have a heigh mast to put it on. So the specs will not be that good as on say 12 Mtr height. I think even on a low mast it will outperform my multiband vertical on 10m. We will see this weekend.

Delta Loop for 10 Meters on a Buddipole

Vertical Polarization 

Horrizonal Polorization of Delta Loop Good for DX

 

The magic that makes this antenna possible is a TRSB, Triple Ratio Selectable Balun. There is a 2:1 ratio position on this balun that is reversed for a 1:2 ratio to match the coax to the 100 ohm antenna. Any balun with this ratio will work.

Ten meters is doing pretty good lately. It sure is nice to have this band open again. I worked Alaska and Argentina on 10 meter CW using this antenna. I replied to an Ea7  station on SSB but he didn’t hear me.

The Delta loop is easy to configure and easy to deploy. These photos were taken on the porch of my condo. I’ll take this delta loop to the beach when the WX clears. I needed a rainy day to catch up on things around the house.

For more information on Buddipole Delta Loops; join the Yahoo Buddipole group

Here’s a nice video featuring a Buddipole Delta Loop http://www.youtube.com/watch?v=Ikm-HICGcrI&feature=youtu.be

This antenna can be used on 12 meters also and on 15 and 17 with additional Buddipole Arms and a longer ‘home brew connecting wire’ to close the loop.

I’ll be trying these bands out at the beach, my usual ham radio portable venue.

73

de AA1IK

Ernest Gregoire

 

 

 

 

Last weekends contest disaster

I did participate in the EPC Ukraine PSK63 contest on 80/40m and the 10m RTTY contest last weekend for a while. Goal was to score some points for the “afdelingscompetitie” (local divisional contest counting). I did make 105 QSOs in total. 78 in the EPC contest and 27 in the RTTY contest. Not much, but not bad since I didn’t spend hours on the radio. Unfortenately N1MM did not support the EPC contest, I could not fill in the exchange UR12 for example, and I had to switch over to DM780 to continue. After all I cannot merge both ADIF files to a good one for conversion to cabrillio and I do have some errors counting as well. I actually made a total mess of it, so I’m sorry I will not send in my log. These russian contests are supported well by mixW, but that is not a free program and I don’t like to work with it. It doesn’t have the “feel” I like from a digital modes program. It could be personal.

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Welcome to the future

Casey TI2/NA7U recently wrote in his blog about the Elecraft KX3 which has a rather outdated look. Of course that’s just a opinion. Others will tell that it has just what they search for in a radio. But…I would rather have a flexible design were I can design my own front and knobs instead of being dependable of what the designer has in mind. With the technology of today it should not be that difficult. So, I was thinking and searching on the internet for pictures and found the site of WoodBoxRadio which already invented and sell part of my idea, the FXpad. It’s basically a Ipad for your SDR (Flexradio system) or of course any other radio. Now, you think that probabely costs a lot of money. Well just look around at that site. FXpad is just software. The pad itself only costs 179 euro, that’s not too expensive if you compare it with for example a Ipad or similair. I remind you it’s only a touchscreen, not a computer! I certainly want to have a screen like this in my new shack!  Anyway, to get back to a idea for a new (QRP) radio with such a configurable touchscreen instead of knobs buttons and a display. What about a radio that is for example just as thick as a Elecraft KX3 but then with a configurable touchscreen. Software/hardware options like a internal keyer, digital modem, build in wireless LAN, progammable voiceprocessing, software updates for new features. There are endless possebilities. Just for example if you want it to look like a old Argonaut radio or just the KX3 if you like, you just change the display and it’s features to what you like. Another idea I would like is a self learning mike connection, a kind of USB plug for your mike. Just plug in any brand of mike and the radiocomputer learns the connections itself. That should be on the radio of the future….any other ideas? You’re welcome to write it as a comment on this post.

Low-profile 2-meter mobile suggestions

A fellow blogger, Brick O’Lore, wrote me with a question that I don’t have a good answer for.  Would anyone care to weigh in on this?

I’d like to add a 2M mobile rig in my wife’s car. Sounds simple enough, but the trick is that I need something that is as small as possible and will have a really neat installation. I’d prefer to have a mobile rig that I can wire in (power and an antenna) and see the display (versus cobbling together something with an HT). A detachable  faceplate/remote would be fine. I want 2M to hit the repeaters – any other bands or advanced features would be a bonus, but not required. The car is a 7 year-old Audi A4 and there is very little room in the footwells. It does have a neat feature – a drawer under each of the front seats. So what’s small and installs such that it will score well on the WAF (Wife Acceptance Factor) scale?

My suspicion is that there are a lot of good choices — and none are going to be particularly “affordable.”  If you have a photo of your creative radio installation that might help others, send it to me (editor at amateurradio dot com) and I’ll attach it to this post.  I think that would be especially helpful.  If not, your insight and tips via comments are always very much appreciated!

Great Cheap Toy for those of us over 40!

OK.. I’ve been debating about getting one of these for over a year.

USB "2.0 Megapixel" Web-cam based Microscope


I finally decided to “risk it”…
At about $30 from China on e-bay (look for “joinnew”) .. they are cheap.. but are they good enough for electronics work?

Lets see. Most claim to be 2.0 MP but like mine the are really noisy above 640×480 resolution because the sensors really are 640×480 webcam sensors. They are backlit with 8 white “high brightness” LEDs.

There are issues with the setup, and are not good enough for a true scientific instrument. But a true scientific instrument would be too much for surface mount work, anyway. So one of the “20x-200x” variants would be better for electronics than a “50x-500x” unit, anyway.

Here are the results:

Highest magnification of a offset print catalog that came in the mail:

Printing press color image at max usable resolution

BATC Digilite board– various parts shot at differing magnifications. The IC is a TSSOP, so it’s pretty small. This shows that I about have hand SMT soldering down.. this is what it should look like at magnification, BTW. (See My other blog for some tips IMHO on how to SMT solder!)

TSSOP I/Q Modulator at "medium" magnification

Chip Tantalum and leads from TSSOP at "low" magnification

Leads on TSSOP at medium magnificaion, but higher magnification than IC package picture

As you can see, it’s quite adequate for board inspection. As the magnification setting increases, the unit needs to be closer to the board. At low (20x or less) magnification the unit can be a couple of inches away from the board. It *may* be possible to actually mount and solder the part on the board when using the USB Microscope at a low magnification setting.. but I’ll have to experiment.

The units come with a poor quality stand, but I plan on getting a stand off a spring loaded arm lamp (I saw a neat one on a small little lamp at IKEA the last time I was in Chicago.. maybe if I ever get back to visit mom).. I suspect if a stand could be fabricated to keep the beast out of the way of the soldering iron, it could actually be used when soldering.. especially with the protective lens cap it comes with on. I’ll figure it out later and post somewhere.

For $30, it’s adequate for electronics use and I actually recommend it as a tool for construction. The only “rip-off” part is that it’s not really usable above 640×480– the higher “res” modes overtax the capabilities of the sensor and are very noisy. (Dont believe the 1.3 or 2.0 MP claims!) Despite this, as you can tell it’s about right for circuit board work.

I used to laugh when someone told me that “right at age 40” you get presbyopia — but I literally woke up one morning 6 months after my 40th birthday, looked down at my (out of focus through my glasses) watch and thought… “oh crap!”…It literally happened to me overnight!… Now I have to take off my glasses to do close in work. I suspect as I further deteriorate with age that it will even get worse.

This seems like an inexpensive tool to cope.

Recommended for the price. Shipping was only one week from China during the “holiday rush” time. Great deal.


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  • Matt W1MST, Managing Editor