Wednesday, July 9, 2014

Shack updates

Sorry for the extended delays in posts!  It has been a very busy summer, and as you might suspect, my 100 Days of Summer goal has really taken a hit this year.  With the bathroom remodel and loads of radios to build, I have just not had the get up and go to get portable.  That said, the main goal of the whole event was to get me active, and I have succeeded with that.  My wife and I got Fitbit Flex activity trackers and we're both walking extra every day to reach our step goals.  So while I may not be operating at the end of my walks, I am getting those steps in and I've already lost 7 lbs this summer, well on my way to my goal weight before our cruise in September.
Anyway, that isn't what this post is about after all.  Now that I've got my amplifier set up and running in the shack, I have been struggling to get a clean, efficient, comfortable setup at the operating position.  One of the major problems is having access to the connections on my radio.  As you are aware, the weather in the Midwest is quite volatile this time of the year so thunderstorms are a nearly daily occurrence.  This means lots of disconnecting coaxes.  I also find myself wanting to connect another radio to my antennas which usually means I have to pull the 590 out, and unplug stuff.  Not any good.

At the moment, the shack is set up like this:
The rotor controller and power/SWR meter are on top of the 590, and the cables are barely long enough for me to move them to the top of the amp to pull the 590 out when a storm comes through. 
It may not be very obvious in the picture but the amp end of the shelf is about 3/4 inch closer to the desk top than the left side.  My brackets might be a little unlevel but I think the beast is pulling the shelf down a bit!  I decided I'd try to go without the shelf in the new setup.

I've been looking at mounting the monitors on an arm for a while but they are typically pretty expensive.  As luck would have it, Newegg had a crazy sale on this model.  Only $42 with free shipping from Illinois, which I expected would be at most 2 days.  Lo and behold, I got a notification shortly after shipping that it would be delivered overnight!  Free shipping for overnight?  I can't complain!

Anyway the stand arrived in the early evening which gave me just enough time to clear the desk and get things ready.  It took me just a few minutes to mount the arms and re-route the cabling and this is what I ended up with:
Looking pretty good.  Everything is well within reach and I can swivel the monitor out of the way and very quickly remove the connections from the 590 (I put BNC adapters on the 590 for quick RF connections too).  Very slick!  The only remaining problem is I often have the connections falling off the back of the desk, if anybody has an easy/cheap solution to this, I'd love to know.

Monday, June 2, 2014

Quick update

Hey guys/gals - I wanted to put up a quick update to let everybody know what I've been up to the last few weeks.  Before Dayton I started working on remodeling our main floor bathroom and it has been a bear so I've pretty  much been spending all my free time working on that or tired enough that I just want to veg.  I will be getting back to my 100 Days of Summer stuff soon enough though.  Just keep an eye on Twitter for operating announcements!

I did get out to the deck last night while dinner was cooking on the grill.  I tossed my EFHW over the pergola and stuck the end to a 20' crappie pole.  I wanted to try out the Youkits FG-01a antenna analyzer I got at Dayton (well ordered at Dayton, apparently Ten Tec didn't bring anything to the actual hamfest).  Granted the setup was not ideal but I only saw at best 2:1 SWR so I may have to go re-trim or re-cut that antenna once I get out to the park again.  None the less, the analyzer is pretty easy to use and I'll have to do a writeup and/or video on that in the future.

Thursday, May 22, 2014

Losing my Religion

Oh life.  It's bigger.  It's bigger than you.  And it is a lot bigger when you have a pair of these....
572B valves
Yeah, the rumors are true.  I have finally taken the big plunge and purchased an amp.  In all honesty, I really have treated my QRP operating in an almost religious way.  I am a purist.  But as you are well aware, my needs and desires have evolved over the years and QRP is no longer the end-all aspect of ham radio it once was for me.  Really, this is all for the better, an all-or-nothing approach to most things is not good!  So my recent excitement and success with DX drove me towards QRO.  First with the homebrew amp for my KX3, then the 590, and now with the new amplifier.  As I've seen others say, power is simply another tool in the ham's toolkit.  It doesn't always have to be on.

The amp is a Heathkit SB-200, good for around 500w on all bands, considerably more on 80 and 40m.  This one was in great shape, probably the cleanest one I saw in the flea at Hamvention.  The guy had $375 on it and my goal was to keep it under $300 and he came back at $325.  I thought it was worth it but I went and got my amp gurus - K0DAS and W0ODS - to review the sale.  Rod (DAS) looked over the amp with an eye on wear and tear, and seeing none, gave me the thumbs up.  Jeff (ODS) was standing behind me literally whispering in my ear "Buy it! Buy it!"  I guess I can't deny that kind of argument!
Doing the deed (K0DAS, Rod in the background. Photo by W0ODS, Jeff)

Friday, May 9, 2014

Great Contest University Video from 2013

Each year, the day before Hamvention starts, there's a couple of "specialty" events going on in Dayton.  FDIM and Contest University are just 2 of them.  I have not yet attended Contest University but you don't really have to in order to get the goods - they have posted videos of the presentations from last year!  Some of the stuff is not really applicable to the modest, home station, but there are a lot of great tips on operating techniques and tips & tricks that can make contests more fun and rewarding for even the more casual operators.  Check em out!

Contest University Videos


 Dayton 2013 Contest University:

  • Contest University I:  Welcome to CTU by Tim Duffy, K3LR and Radio Sport Contesting, It’s More than Rules by Dave McCarty, K5GN
Note:  There were some technical difficulties and the presentation is not showing in the video. 
  • Contest University II:  Tips on Being a Better Single Operator by Randy Thompson, K5ZD
  • Contest University III:  Design, Installation, and Maintenance of Antennas by Frank Donavan, W3LPL
  • Contest University IV:  Contest Antennas and Coaxial Cables by Frank Donavan, W3LPL
  • Contest University V:  2013 Eye Ball Sprint Contest by Doug Grant, K1DG (Not Norman)
  • Contest University VI:  K9AY Look Arrays for Low Band Contesting by Richard Jaeger, K4IQJ
  • Contest University VIIA:  Propagation Trends 2013 – 2014 Intro by Frank Donavan, W3LPL
  • Contest University VIIB: Propagation Trends 2013 – 2014 by Frank Donavan, W3LPL
  • Contest University VIII:  Rotors & Construction Practices Q&A by Frank Donavan, W3LPL
  • Contest University IX:  Contest Radio Performance by Rob Sherwood, NC0B

Tuesday, May 6, 2014

An updated EFHW for 17-40m

I've been requested over and over to make a post on the topic of my latest EFHW project.  As seasoned readers of the blog will know, I am a huge fan of these antennas for a number of reasons, primarily that they are incredibly easy and quick to erect.  The big limitation is the operating frequencies are relatively fixed with a single wire antenna.  The PAR design for 40, 20, and 10m works great on those bands, and in a pinch on other bands with a tuner but I wanted something with a good match on all bands I wish to operate on.

I should note that this design is nothing novel, I know other hams are using similar methods to multi-band their antennas so I can't take any credit for the idea.

My antenna solves the problems of my other EFHW antennas by introducing breaks in the wire where I can add or remove length to get on other bands.  These are made by tying fishing snap swivels onto the wire (we're using #26 PolyStealth wire here) and soldering a mini-bullet connector as the mate.  This is best described in pictures:
As you can see, both ends of the wire get a snap swivel which then connect to each other, taking any tension off of the connection and placing it on the wire instead.  Then to switch bands, you just press the bullet connectors together and hoist the antenna back up.  Sure, pulling the antenna up and down any time you want to change bands is a bit of a pain but it uses zero power and has zero loss so you can't really beat that.

Now you could just do that for every band, but after 20m, your wire starts to get pretty long and I had grown very fond of the ~40' wire used on the 40/20/10 PAR antenna.  It is a great length and I don't usually have any problem getting a support string up that high on the first shot.  Any longer though, and things get interesting.  So, I was convinced I'd have to figure out how to keep the antenna short enough for that.

As you know, the PAR design uses a loading coil to shorten the antenna on 40m.  I had to add one to my design as well.  Here's how I managed it:
As you can see, I continued with the snap swivel design but because I wanted to get on other bands, I couldn't just solder the wire right onto the bottom of the coil so I added bullet connectors again.  The snap swivel is held on the coil by a second piece of heat shrink.  It feels pretty solid but there is probably a better way to secure the swivel.  Oh and the coil is about 34uH as we've discovered in our previous work with EFHWs.  I think it is 51 or so turns around 1/2" pipe.  In this case I'm not sure it is even that critical.

So with the coil in place, there's another length of wire and the same snap swivel/bullet gadget between a 30m element and the 40m element.  The total length is about 40 feet again but now I can get on 17 through 40m without any problem.  I'd like to go back and add 15m but I'm hesitant to do that and risk missing the mark and scrapping the whole first length of wire.  I may go that route eventually.

So anyway, that's the new antenna.  The matchbox is unchanged from our previous models and it seems to work great.  I hope others can improve on the design, and if you do, let me know!

Field report: QRPTTF/SOTA 2014

View from atop Platte Mound
On May 3rd we celebrated the QRP To The Field event by going out to Wisconsin for some W9 SOTA and a spot of portable ops.  I've been out to Platte Mounds, W9/WI-017, before, back when the W9 association was launched.  Read about that double activation here.

This time around I decided I'd just stick to the "easy" peak and make the most of my time there.  I also treated this activation as one of my 100 Days of Summer which was easy since it took me almost exactly 10 minutes to climb the stairs and trek through the wooded area on the peak to find a spot to operate.

Platte Mound is a public attraction so there's a few picnic tables on the top in a clearing.  This is where I operated last time but I thought I'd go into the woods a bit this time for a little more privacy.  It was a very windy day so that location offered a little respite from that as well.

Log where I sat for the duration of the operation - sore rear end.
I brought along my homebrew 2m/440 antenna I use for satellite work too but unfortunately I didn't make a single sat contact.  I had plenty of luck on HF though!  I set up my latest EFHW which uses snap swivels and little bullet connectors to work on several bands.  I'll have a separate post on that antenna.

I put the FT-817 on 17 and started off. I took a bit of video of the event and put it on Youtube.  I included a review of my new QRP portable bag at the beginning.  Check it out:

Friday, May 2, 2014


Tres de Mayo!

Tomorrow I'll be heading to Wisconsin for QRP To the Field and SOTA activation at Platte Mound.  I was there not too long ago to be the first to activate a W9 summit.  Read about that here.

I plan on being set up and QRV around 9 AM local time.  I'll be taking along my 817 and MTR and wires for 17-40m in addition to my satellite antenna so I'll be looking for satellite QSOs too.  I may scan around on V/UHF simplex too but I doubt there will be any activity.

This will also be a 100 Days of Summer day so I guess I'll have to run around in circles on the peak for 10 minutes before I start!

Keep an ear out for me and have fun tomorrow!