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“Hey, Dad …… do you have a meter that will read really small voltages and tiny amounts of current?”, my son Joseph asked the other week.

“Joey, I’d better! I’m an Amateur Radio operator, and I was an electronics technician for 22 years.”, I replied.

And so began the 2014 8th grade Science Fair project. My son decided to see how the pH of a fruit or vegetable would affect its ability to generate electricity. His hypothesis – the more acidic the fruit/vegetable, the more power would be generated.

The materials were an apple, a lemon, a pear and a potato. A head of red cabbage was procured to act as a pH indicator. Zinc screws and 3 inch pieces of #10 gauge copper wire served as electrodes.

Before we began generating electricity, my wife boiled some leaves from the cabbage in a pot of water. The resulting liquid would act as our litmus paper.

I stuck a screw and a piece of the copper wire into each piece of produce. The positive lead from the meter went to the copper wire and the negative lead was attached to the zinc screw. We measured both voltage and current, to be able to calculate Watts.

A teaspoon of the cabbage water was put into four glasses. Juice from each piece of produce went into the purple cabbage water. If the cabbage water turned blue, it would indicate a base. If the water stayed purple, the pH would be neutral. An acidic pH would turn the cabbage juice pink.

From lowest output to highest were – potato, pear, apple, lemon.
And in turn, the potato had the lowest pH, while the lemon had the highest. The voltage and current readings followed the pH indications. It seems my son’s hypothesis was correct!

Now all Joey has to do is make a graph, print out the pictures we took and write up an explanation of what was observed. The really neat thing was that he had a good time and really enjoyed himself. I’m not sure what he wants to be, someday; but something in the scientific or electronics field would not be so bad.

72 de Larry W2LJ
QRP – When you care to send the very least!

Today was QRP to the Field for 2014, and it was also my birthday. What a present! Although I didn’t get to spend anywhere near as much time on the air as I would have liked, I got a little air time in and that’s always a good thing.

The theme for today was Tres de Mayo in honor of Cinco de Mayo. Well, here in New Jersey there really aren’t an abundance of locales with a Mexican flair. So I got a little creative.

Yes, I placed some Chipotle Mayo next to me while I operated.

I got to experiment a bit too. I used both my Par EndFedz and the EARCHI 9:1 Unun with a 36 foot radiator. The Par EndFedz performed as expected. The EARCHI performed much better than last time. The extra three feet of wire made a big difference. The KX3 handled the wire well on all bands, 40 through 10 Meters with minimal clicking and clacking from the auto tuner.

In the hour or so of operating time that I got in, I worked about a dozen or so stations. Included were some very familiar calls like Mert W0UFO, Jerry N9AW, Rick NK9G, Dave AB9CA, Gene N5GW and Kelly K4UPG among others.

So even though I didn’t get a lot of operating time in, I did learn more about the EARCHI end fed. I think it will serve well as an all around multi band antenna for portable ops.

72 de Larry W2LJ
QRP – When you care to send the very least!

Here’s a video by Dennis Blanchard, K1YPP who is also the author of “Three Hundred Zeros”

Dennis hiked the Appalachian Trail, among other places and has lived to tell us all about it.  If you haven’t read his book, then you’re missing a good read.  While there’s not a whole lot in devoted to Amatuer Radio, it is a good read nonetheless, and inspiring, too.

72 de Larry W2LJ
QRP – When you care to send the very least!

Paul Signorelli W0RW posted this to QRP-L yesterday. It is entitled “Top 10 Steps for QRPttF Operation”.  This is SO good that it needs to be shared with those who might not subscribe to QRP-L. Paul has spent many a year operating outdoors, particularly pedestrian mobile.  Paul has a wealth of tribal knowledge built up here and this is good – very good, but often overlooked advice.

Here are the Top Ten Steps that I take for successful QRP Portable operation:

1. Propagation and Band Activity.
When you operate portable you want to work as many people as possible so the band conditions must be good. This means that you have to keep track of the propagation conditions before planning an operation. I try to look for propagation predictions for the band I plan to operate on but they are not very reliable. I check the QSL Net propagation site at <http://dx.qsl.net/propagation/>

The flux is always changing, so before I pick a date to operate, I monitor the bands at the same time that I plan to operate. The Absorption Index is also a key factor, I never operate when the “A” Index is above 6. I also use the NCDXF beacons see: <http://www.ncdxf.org/beacon/beaconschedule.html>

Trenton Military (15034 kHz) or CHU (14670 kHz) for 20 Meter propagation checks. Coastal stations might use WWV/WWVH on 10, 15 20 and 25 Mhz.

20 Meters is best for day time country wide propagation. 40 and 80 Meters are good for night time operation. I always try to avoid contests and other busy periods. Checking the QST Contest Calendar helps to insure the band is going to be clear. Check your desired frequency in advance, you don’t want to pick a frequency that is used for nets, traffic handling or RTTY.

2. Weather Conditions.
The weather forecasting is really good, so this is easy.
Try <http://www.wunderground.com/>
I look for warm temperatures and no wind. If it is going to rain don’t get too far away from a shelter.
Check your local web cam.

3. Honey Doo Items.
Always check the XYL’s honey doo list and make sure you have a valid Pass for the day.

4. Location and Road Conditions.
Try a your local National Park <http://www.nps.gov/findapark/index.htm>, If you are an Old Timer you can get a lifetime Pass. Always check the road and site conditions before going out in the field. You don’t want to drive hundreds of miles to find out that the Capulin Volcano road is closed by snow. Canyon roads can have snow or land slides, Pick an open space operating site, canyons are not good for QRP operating. If you are going to operate Pedestrian Mobile with a whip you will want to find trails that don’t have a lot of over hanging, antenna eating branches.

5. Equipment Readiness.
You need to check out your equipment right before you head out to your operating site. This prevents leaving behind some critical item. Needless to say, you should have your antenna all pre-tuned before you leave. My radio is always mounted to a backpack and is always ready to go. The LiIon battery is always charged but I always take a spare. I just need to put the back pack into the car, with the antenna and counterpoise. The accessories should also be checked: microphone, earphones, key, SWR meter, pen, log, watch, hat, gloves, coat, etc.

Make an equipment checklist.

It is good to charge or have a spare accessory batteries for your computer, keyer, SCAF, HT’s, etc.,
and a spare radio, clip leads and duct tape for contingencies.

6. Vittles.
I take water, lunch (GORP) and my VHF HT in a fanny pack.

7. Operating Announcements:
I try to post my operations on the reflectors a day before the operation. When you post too far in advance, people forget and when you post right before the operation, some people don’t get get the notice until after your are finished. I always try to be on my exact posted frequency (or alternate) at the exact time so people don’t get stood up. Posting your operating times gives you more Q’s. It is no fun running your battery down calling CQ with no responses. QRPspots, HFnow, GORC, QRP-L, SOTA Summits are good places to list your operation, as appropriate.

Post your schedule in GMT (Universal Time/Zulu time) as well as your local time.

Also post details about your operating location, links to pictures, trail maps, QSL Information, will be helpful, etc.

8. Prep Your Vehicle.
Put gas in your tank !

9. Initial set up.
When I arrive at my operating site, I set up my rig , attach the antenna, and check power and my operating frequency. When operating Pedestrian Mobile, I tune my whip and dragwire, put on my backpack and I am ready for the trail.

10. Safety.
Always be prepared for adverse conditions. You might need rain gear, snake proof boots, a map, GPS, etc. Always give someone your travel plans. Take your cell phone or an HT that will hit a repeater.
Be safe !
————

For more detailed information on Portable and Pedestrian Mobile operation get WA3WSJ’s Amateur Radio Pedestrian Mobile Handbook. He has made his First Edition Handbook free at: http://w3bqc.homestead.com/W3BQC-Library-Contents.html

That’s it, the Top Ten Steps for QRP portable operating. If you are addicted, you can consider this your 10 Step Program.

Paul w0rw

Thanks for sharing your wisdom and knowledge, Paul!

72 de Larry W2LJ
QRP – When you care to send the very least!

I worked JT1AA/3 in Mongolia again tonight. This time it was different, though – it was on 15 Meters instead of 17 Meters for a new band, and 5 Watts did the trick this time. It took a couple of repeats, even with another station trying to send right over me, but Gan’s terrific ears pulled my signal out of the aether.

Mongolia on 5 Watts – covering a distance of about 6,320 miles. Very cool beans!

In addition, thanks to some helpful direction from Terry G4POP and Daniele IW3HMH, I was able to solve a slight problem with Log4OM that was baffling me.  When I would mouse click on a station in the DX Cluster, the KX3 would go right to the proper frequency – but the radio would change modes and go into CW REV.  It didn’t matter if I was changing frequencies between bands or within a band.  Whenever I clicked, I would jump to the right frequency – but the mode would always change from CW to CW REV.

So on Terry and Daniele’s suggestion, I went into the configuration files for the K3 in OmniRig (the CAT program that Log4OM uses). There I saw the commands for CW and CW REV. The command for CW-U was MD7 and the command for CW-L was MD3. So I flipped them, saved the file, restarted everything and now it works fine. Geez, at this rate, I might become a software problem solver in about a hundred years or so!

72 de Larry W2LJ
QRP – When you care to send the very least!

Last Wednesday evening, just before turning in for the night, I placed an order with Amateur Radio Supplies for some antenna rope and wire. I placed an order for 150 feet of 14 gauge jacketed Flexweave and 200 feet of Dacron rope.

The next morning, I had an order confirmation in my inbox and by the end of the day on Thursday, I had received a “your order has shipped” e-mail. To be honest, my initial thought was, “Yeah, right!”.

Much to my surprise, the rope and wire arrived on Saturday via FedEx Home Delivery. Wow! I have to say that Amateur Radio Supplies made a believer of this sceptic. I certainly was not expecting such fast service, but was very happy to receive it.

This weekend is QRP To The Field. The weather for Saturday is looking “iffy” right now – partly sunny/cloudy with a 25 percent chance of showers in the afternoon. I will probably operate from the backyard and will have my son help me cut a few radiators to try out the 9:1 EARCHI UNUN a little bit more.

In order to prepare, I did the first lawn mowing of the season tonight after dinner. The front yard needs some work (re-seeding), but the back yard is in decent shape.

72 de Larry W2LJ
QRP – When you care to send the very least!

Got an answer from Terry G4POP regarding my Log4OM issue regarding the distances being shown in kilometers, rather than miles (even though I chose the miles option):

 “Distance in miles is only for display, when the record is saved to your log it has to conform with the ADIF (Amateur Data Interchange Format) format which requires Km.”

Since I’m not the software or ADIF expert, I’ll accept that answer, although HRD and other logging programs I have played with seem to work around it.  In light of how good the program seems to me so far, it’s a minor inconvenience, and in the scheme of things I can live with that.  What’s more important to me is that the CAT (Computer Aided Tuning) works well.  The KX3 seems to obey whenever I point and click on a frequency.

The DX Cluster and the loading and downloading to and from eQSL and LotW work especially well. Callsign lookup is lightning fast. In short, Log4OM is easy to use (it has a very short learning curve), it makes sense, works well and is aesthetically pleasing too. It’s easy on the eyes and to many, that may be superfluous, but to me it is important. 

Another big plus is that the Website offers for download a comprehensive User Manual that is complete, but is still a manageably sized document that I can keep on my tablet for easy reference.

The evaluation of logging software is very subjective. What works for one person is useless to another. Log4OM works very well for me, and if you’re looking for something new, or a nice package, be sure to check it out.  It might not be your cup of tea; but then again it might.

Here’s a VERY COOL special event that is going on tomorrow. I want to help spread the word:

“A Special Event honoring 20 years of the AZ ScQRPions QRP Club will be held April 26, 1400-2330 UTC at the unique relic of the cold war nuclear deterrent: the TITAN MISSILE MUSEUM in Green Valley AZ dedicated by Ronald Reagan to creating an ongoing awareness of the Armagedon that would result from a nuclear exchange. Everyone should be guided through the silo andcontrol rooms to get a sense of the reality of it all.

The CLUB will use the site’s primary antenna — a broadband 90′ DISCONE with a fairly flat SWR from 1.8-30 Mhz, with low nodes in most of the ham bands. We will operate with QRP rigs such as the KX3, K3, QRP+, ICOM-703, ATS-4, Wilderness Sierra and who knows what else. QRP frequencies will be used to the extent they produce steady contacts. Otherwise take note of the following operating Fregs: SSB — 14270Mhz, 18130Mhz, 21280Mhz, & 28370Mhz, +/-20Khz; c.w. –14020, 18072, 21030, 28015, +/-10Khz. We will call ” CQ TITAN de K7T”.

Details and photos of the DISCONE monster can be viewed at the following links:

http://www.wa0itp.com/titandiscone.html
http://www.wa0itp.com/ttm%202010.htm

http://www.gvarc.us

Special QSL on receipt of your QSL to:

Ade Weiss W0RSP, 810 N. Placita la Canoa, Green Valley, AZ 85614

QRO stations certainly invited to let us know we’re getting out — and to practice copying weak DX signals and local QRP signals! Win-win!

Check http://www.QRPSPOTS.com for most current frequency info.

Simultaneous operation of three stations on the Discone is planned using a triplexer and bandpass filters. An in-band SSB 20m – 10M experiment will be attempted with additional antennas separated from the Discone. Note that 12M, 17M CW/SSB and 30M may also be used as this is not a contest, but an outdoor operating event on a nice 90F+ spring day!

Drop by for a QSO! Make our day! CU de TITAN!

Also …… tomorrow, Saturday April 26th is International Marconi Day.  You may hear a lot of stations on the air around the world using an “IMD” suffix.  That’s what that is all about.  You can read more about it on the ARRL Letter, if you get that, or by going here:  http://g4usb.net/IMD/the-award/award-classes/

72 de Larry W2LJ
QRP – When you care to send the very least!