All posts by Thomas Witherspoon

Field Reports, Morse Code, News, Portable, POTA, QRP, SOTA

Fitting in some QRP SOTA & POTA on Mount Jefferson!

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Looking back at last year (2021), if I had to pick out one of the easiest SOTA activations I made, Mount Jefferson would be near the top of the list. It’s a very accessible summit although not technically a “drive-up” summit because you will need to walk a short distance up a service road to the activation zone (AZ).

Mount Jefferson (W4C/EM-021) is located on and protected by the Mount Jefferson State Natural Area (K-3846), so when you activate Mount Jefferson for Summits On The Air, you can also claim the activation for Parks On The Air and World-Wide Flora and Fauna as long as you work at least 10 contacts.

What I love about POTA and SOTA “2-fer” sites like this is that you can set things up to be spotted in both systems (and often the WWFF system, too!) which increases your audience of hunters and chasers, thus increasing your odds of achieving a valid activation in all programs. It’s especially desirable if you’re a CW op and know you may potentially be in a spot with no mobile phone service for self-spotting; if, for some reason, RBN auto-spotting functionality is down with one program, the other serves as a backup.

Mount Jefferson is at least a two hour drive from my QTH, but it was easy pickings on April 29, 2022 because it happened to be within spitting distance of New River State Park where I was camping with my family.

Mount Jefferson (W4C/EM-021)

The drive to Mount Jefferson took all of 20 minutes which was a good thing because our family had other activities in store that day including some extended hikes!

Hazel (above) was so excited to to check out the sights and smells at this new-to-her park! Continue reading Fitting in some QRP SOTA & POTA on Mount Jefferson! →

Accessories, Antennas, News, POTA, SOTA

The arborist throw line is an invaluable field radio kit tool

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Two days ago, I activated Parc national des Grands-Jardins (VE-0499)–a stunning national park here in the Charlevoix region of Québec, Canada.

As soon as we drove up to the activation site I had researched in advance, I surveyed the picnic area and mentally noted the best spot to deploy an end-fed half-wave using my trusty arborist throw line.

With the throw line’s assistance, I had an antenna deployed within a couple of minutes max.

It hit me then just how invaluable a tool the arborist throw line has become for the types of park and summit activations I do.

Pre-Throw Line Activations

During NPOTA (National Parks On The Air) in 2016, I wasn’t aware of arborist throw lines and had been using some high test monofilament fishing line attached to a weight.

The fishing line was strong enough to support my QRP antennas and I could typically reuse the same length of line for 2-3 activations. Eventually, the line stretches and weakens thus it must be cut off and discarded.

Never again

I’m a big Leave No Trace kind of guy, so am embarrassed to admit that during one activation, my fishing line snagged high up in a tree and left a bundle of broken monofilament in a spot where I could not retrieve it. This was deep in a forest and although I doubt anyone will ever see it, I know it’s there. It bugs me to this day and if I ever sort out a way to remove it, I certainly will.

This occurrence was one of the catalysts for purchasing my first arborist throw line kit.

That throw line kit absolutely revolutionized my antenna deployments by:

  • increasing the speed deployment,
  • increasing accuracy,
  • allowing me to re-use the same line hundreds of times,
  • and being orders of magnitude more reliable and stronger than fishing line.

It changed everything and I’ve never looked back.

Since that first throw line kit (which I’ve lent to a newly-minted active ham), I’ve built four more throw line kits.

Compact Weaver Throw Bag

In early 2021, I purchased a second throw line and 12oz weight (identical to my first) for backpacking along with this compact Weaver Leather throw line storage bag (affiliate links).

I was searching for a more SOTA-friendly/backpack-able solution than the arborist throw line cube.

I was very skeptical about how easily this bag would work in the field. One of the reasons my throw line storage cube works so well is because the opening is large allowing the line to deploy without tangling. Packing up is fast because the line can be flaked back into the cube in a matter of seconds. Continue reading The arborist throw line is an invaluable field radio kit tool →

Articles, Guest Posts, QRO, QRP

Scott runs some QRO v QRP numbers!

8 Comments

Many thanks to Scott (KK4Z) who shares the following post from his blog KK4Z.com:

QRO SCHMURO

There is always a lot of talk about QRP vs QRO, 5 watts vs 10, ad nauseam. So today I thought I would run the numbers and see what the real deal is. First we need a few definitions. An S-unit in general terms is the minimum change in signal strength to be just noticeable (k3wwp.com). In more technical terms it equates to approximately 6 db in change. The decibel (dB) is a logarithmic number. Each 10 dB represents a factor of 10 difference. This may be a little out there for some so we will cut right to the shortcut. There are two types of logarithms. For calculating dB, use the common logarithm which is base 10. To see if your calculator uses the right one. Punch in 100 and then log. The answer should be 2 which equates to 10 to the second power which equals 100. This is not a technical paper but an entry way to see how changing the power levels affect the signal level of your transmitting signal. As you guessed, it is not linear.

Let me introduce an equation:

Where Power P1 is the power you wish to evaluate and reference power P2 is your starting power. Let’s take going from 5 watts to 10 watts. The equation would look like this:

We take 10 and divide it by 5 which give us 2. Then we hit the log function on our calculator which gives us 0.301. Multiply that by 10 and you have about 3 dB in gain or about one half of an S-unit (remember 1 S-unit is equal to 6 dB). Let’s do one more by hand and tackle the QRP/QRO debate. How many S-units will increasing power from 5 watts to 100 watts give you? The equation looks like this:

Take the 100 and divide by 5 to give you 20 and then hit the log function to give you 1.301. Multiply by 10 for 13.01 dB. Divide 13.01 by 6 dB and you have 2.17 S-units. Going back to our definition that one S-unit is the minimum change in signal strength to be just noticeable shows that going from 5 watts to 100 watts is not that great of a change.

Let’s let the other shoe drop. What about going from 5 watts to 1500 watt? That will give you 4.13 S-units of gain vs 1.96 S-units going from 100 watts to 1500 watts?

This gives you a fairly easy equation to help you evaluate your needs based upon empirical data. Running 20 watts over 5 gives you 1 S-Unit. Using less power means less drain on the battery for longer operation. This is only part of the equation. Propagation, antenna, mode used, and station efficiency all play a part. Have fun and maybe don’t toss the QRP radio yet. 🙂

Click here to read this post and more at KK4Z.com.

Announcements, News

Starting today, you’ll be able to upload your own POTA logs!

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The Parks On The Air website has the following message displayed on their home page:

After 12:00 Zulu (9AM Eastern Time USA) Friday, July 1 [2022], and once you have logged into the http://pota.app site, you will notice “My Log Uploads” as an option in our menu. Immense thanks WR5B and N0AW!

Those of us who have been POTA’ing for a few years will find this a very welcome feature!

Up to this point, POTA has been using regional volunteer coordinators to upload logs and they’ve done an amazing job. As POTA has grown–by orders of magnitude over the past few years–the amount of time needed to do uploads is truly significant for those coordinators. In at least one case I know a coordinator’s work load actually cut into their own POTA activating and hunting time.

I’ve always been so appreciative of our coordinators, but always felt hesitant to bug them when I’d discover an error in my logs that required deleting a log entry and re-uploading. I’ve never had a coordinator complain, but I hated to get them involved over a transcription error on my part.

I’m so happy to see that the beta testing has gone so well and the system will be online within an hour (at time of posting Friday morning).

I understand Mike (K8MRD) will soon publish a video here explaining how the new self uploads work.

Many thanks to all of those involved with making POTA what it is today and I’m so pleased to see self uploads being brought online. I would suggest we all be patient if we experience any problems as I suspect the new functionality is going to get a proper workout starting today!

News

Server hiccups…

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Quick announcement:

Those of you checking QRPer.com between about 6:00-11:30 UTC  the past couple of days may have noted that the site has been down and displaying the message: “Error establishing a database connection.”

Our host, QTH.com, is trying to identify the cause of this and I’m sure they’ll sort it out soon.

Thanks for your patience!

Thomas

Morse Code, News

Carl builds the ULTRA-PK “PicoKeyer” CW memory Keyer Kit

6 Comments

Many thanks to Carl who writes:

Hi Thomas,

I’ve grown to love the prerecorded CW memories on my KX2. I’d fallen out of love with my 817ND because it didn’t have them.

Then I saw your video where you used a PicoKeyer. So… I ordered one.

But I messed up and it came in kit format.

So, tonight I built my first Kit-anything in about 30 years.

And, it actually worked!

What a cool little device..

Thank you for sharing this, Carl! This little kit is a lot of fun to build and quite affordable. The end product is one you’ll use for years to come as well.

It’s an amazingly capable little keyer and a proper value!

I purchased mine from this Bay seller in Ft Collins, CO. 

Accessories, Antenna Tuners, New Products, News, Portable

The Elecraft T1 Protection Case by Tufteln

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Long-time QRPer.com reader and supporter, Joshua (KO4AWH), runs an Etsy store with a wide range of products primarily designed for field operators. Over the past few months, Joshua has sent me various prototypes for feedback and also to test in the field. You’ll see some of his antennas in upcoming field reports and activation videos. I’m very impressed with his designs.

If you’re an Elecraft T1 owner, you should be especially interested in his T1 Protection Case.

Joshua sent me an early version of this clip-on case several months ago and it immediately replaced the simple cover I printed from a Thingiverse file. (To be clear, the Thingiverse case served me well for a couple years, but I prefer this one since it doesn’t require a rubber band to hold it on the T1.)

The Elecraft T1 is a hearty little ATU and I don’t worry about damaging it while tucked away in my SOTA pack, but the little buttons on the front are prone to be pushed with any amount of applied pressure. This can result in unintentional operation which can accidentally place it in bypass mode or at least shorten the life of your 9V cell.

The Elecraft T1 is not an inexpensive station accessory and, at the moment, they’re about as rare as hen’s teeth. The lead time on new T1s is counted in months rather than weeks (at time of posting, this is due to vendor board issues).

The Tufteln Protection Case simply snaps on the Elecraft T1 and protects the BNC connectors, ground point, and the front panel buttons.

The case material is durable and adds very little to the bulk of the T1.

Of course, you can’t operate the T1 with the case around it because the BNC connectors are covered, but I have propped up my T1 on the case while using it on rough concrete picnic tables. I’d rather the case be scratched than my T1!

If you own an Elecraft T1 and don’t have a protective cover, I’d encourage you to either print one, or buy Joshua’s T1 case. For years, I simply removed or reversed the 9V battery to keep the T1 from engaging while packed, but that doesn’t protect the buttons and (frankly) it’s a pain to pop the battery out and flip it for each use (then to remember to flip it back when packing away).

The Tufteln case is a simple and affordable ($16.50) solution!

Thanks for sending this to me, Joshua. I dropped my T1 while setting up my TX-500 for Field Day and it protected my favorite little ATU!

Click here to check out the Elecraft T1 Protective Case on Etsy.

Field Reports, Morse Code, News, Portable, POTA, QRP

Pairing my new Xiegu X6100 with a 31 foot speaker wire antenna (and avoiding RX overload)

20 Comments

Regular readers of QRPer.com might question the wording in my title since I’ve already posted several field reports and even a full review of the Xiegu X6100. So why would this X6100 be considered a “new” radio–?

Since I go over this in more detail in the activation video (linked and embedded below), I’ll give you the nutshell version here:

My activations with the X6100 early this year (2022) were all performed using a loaner unit sent to me by Radioddity. I kept that unit for a few weeks, shipped it on, and purchased one of my own.

In February, when I received the X6100 I purchased, I immediately noticed a small mechanical issue with the encoder.

This is the X6100 open. You can see the back of the encoder to the right of the ribbon cable.

I tried fixing it (with instructions received from Xiegu) but in the end had to return the transceiver for replacement.

The X6100 unit in this field report is my replacement–technically, the third X6100 I’ve had in my hands, and this was my first activation using it.

Many of you have asked why I haven’t taken the X6100 to the field more often this year and this is why. I basically didn’t have a functioning unit for most of February, March, and April. Radioddity was quite responsive to my issues with the X6100, but frankly I had a lot going on during that time frame so it took longer than normal to troubleshoot, modify, test, and send back the faulty unit.

Fortunately, the replacement X6100 has no encoder issues other than the brake is very tight. I’m not willing to break the warranty seal on this unit to adjust it, so I’ll just live with a much-tighter-than-I’d-like encoder.

[Update: Bob (W0BNC) points out that the tight brake is due to friction caused by a felt pad under the X6100 encoder knob. The remedy is to pull off the rubber ring around the encoder knob, loosen the set screw, lift the knob slightly off the body, and retighten. I’ll do this when I’m back with the X6100 after summer travels. Thanks, Bob!]

X6100 field kit test

This activation was also the perfect opportunity to test all of the components of a dedicated field kit I’m building around the X6100.

The kit consists of:

  • The Xiegu X6100 QRP transceiver,
  • a BNC binding post adapter,
  • paddles,
  • the X6100 battery charger,
  • a 31′ speaker wire antenna
  • 25 meters of 2mm throw line,
  • a weaver 8oz weight, and a
  • logging pad and pencil.

Everything, save the antenna, fits in my Red Oxx Hound EDC pack.

Eventually, I’ll replace the speaker wire with some thinner Wireman stuff and it should all fit in the Hound pack, albeit snuggly!

I’ve decided that the X6100 will live at my parents’ home in the NC foothills, so I’ll always have a field radio kit available while staying there overnight.

Lake Norman State Park (K-2740)

On May 9, 2002, an opportunity opened up in the afternoon to finally take my new X6100 to the field! Continue reading Pairing my new Xiegu X6100 with a 31 foot speaker wire antenna (and avoiding RX overload) →

Events, News, QRP

Making everyday Field Day

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Since I began my ham radio journey in 1997, I’ve always looked forward to one event more than any other: ARRL Field Day.

No doubt, this is due to the fact that one of my earliest experiences after being licensed was participating in Field Day with my (then) local club ACARA in Athens, Ohio. We were operating 1A battery which meant “One transmitter, club or non-club group, power output of five watts maximum.”

In short? It was a blast and a proper introduction to the power of QRP.

In fact, Eric (WD8RIF) has such a deep archive of field events on his site, you can read the original  field report here.

I was already looking forward to the next field day as we were packing up our site that year.  It was insane fun.

2022 Field Day

Gaétan Trépanier (VE2GHO) making final adjustments to the club’s HF Yagi during Field Day 2017

I had hoped to spend Field Day 2022 with the amazing crew at C.R.A.Q (Club Radio Amateur de Québec), but it just didn’t work out due to our family schedule which included some beautiful hikes. I’ve spent Field Day with C.R.A.Q. twice before and thoroughly enjoyed it.

I did, however, make a couple dozen random Field Day contacts in CW on 20 meters from our condo.

I’m grateful to Vince (VE6LK) who held a Field Day Zoom conference call all weekend hosted by his local club, the Foothills Amateur Radio Society. It was a drop-in, drop-out 24 hour session and was a brilliant substitute for all of the amazing side conversations one would typically have during an in-person club Field Day event. It was great meeting members of FARS, friends like George (KJ6VU), and so many others who popped by for a visit.

Field Day Everyday!

I’ll admit that I get a bit of that Field Day feeling each time I do a park or summit activation.

There’s none of the in-person camaraderie because my activations are typically solo, but on the air I’m connecting with my POTA family and friends. It often feels like a little on-air reunion where we all check in.

Of course, it certainly scratches that Field Day itch of setting up my radio gear in the great outdoors, operating from battery power, experimenting with antennas, and sometimes even managing small pile-ups.

I live for that stuff!

How about your Field Day?

Tell us about your 2022 Field Day experience in the comments section!

Did you play Field Day with a club or at home? Did you hop on the air? What were conditions like? What gear did you use and did you experiment with any new antenna designs?

Inquiring minds want to know. Please comment!

Guest Posts, News, SOTA

Paul’s SOTA excursions captured on live webcams

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Many thanks to Paul (W0RW) who shares the following guest post:

Can you See Me Now? Portable Operation From a Web Cam.

by Paul (W0RW)

There are now thousands of web cams operating around the world and they make great portable operating locations.

By watching a webcam stream, the stations who works you can watch you live as you talk to and log them.

When I am activating a site with a live webcam, I post the web cam link on my QRZ.com page and then stations who contact me can then go to QRZ, click and watch. I usually have a big sign that shows up on the web cam with my call and my frequency. Even DX guys who can’t hear me can watch me operate.

Many web cams are now live streaming; they give you fast refresh rates and real time video. Other bandwidth limited cams refresh at slower rates and may give only 1 frame every minute.

I was at the ‘Teller 1 Web Cam’ on 8 June 2022 (see photos above) and made 10 Q’s on CW and 10’Q’s on SSB. It has an almost real time video but with a delay of about 10 seconds. It is at 10,000 feet.

The HD Pikes Peak Panoramic Cam that I frequently use (At 14,115 feet) has a revolving 1 minute refresh rate.

I am standing right above the ‘RW’ sign.

The remote Independence Pass, Colorado, Web Camera is a solar powered wireless camera with a 1 minute refresh rate. I am standing just to the left of the tree.

This camera is down now and won’t be back on line until July.

Paul w0rw
Colorado

That makes for a fun dimension in playing SOTA, Paul! Thank you for sharing. So far, I haven’t activated a summit with a webcam, but it looks like there are numerous ones in Colorado. I’ll have to keep this in mind before heading out there!