Tag Archives: 100 mW

Sometimes, I like the odd “exercise in futility.”

I enjoy shaking up routine and since POTA and SOTA activations are my routine, they end up being the shakers.

On Monday, September 18, 2023, I found out that our planet was rotating into a large CME (Coronal Mass Ejection). This CME made all of the space weather news and we planned for either some potential radio blackouts or at least very unstable conditions.

As I’ve said many times before, I never let the potential for poor propagation stop me from hitting the field. Don’t let it stop you either.

Lake Norman State Park (K-2740)

I had a full afternoon to play radio, so I made my way to Lake Norman State Park.

En route, I tried to think of a way to shake up the activation a bit. I planned to activate at the same spot I had during my last visit because I knew the park’s main trail system was still closed and, frankly, I wanted to take advantage of the EV charger at the visitor’s center again!

I’d packed MW0SAW’s End-Fed Half-Wave (the gift that keeps on giving, Steve) and I did have one new radio toy (more on that later).

I also had a lot of time–at least, more than I normally do during a POTA activation–so I thought it might be fun taking my KX2 down to the lowest power setting it has: 100 milliwatts.

I’ve activated parks with 100mw before, but never intentionally on a day when I knew propagation would be poor.

I figured with enough time, maybe I would get the ten contacts needed for a valid POTA activation.

If not, it would be fun trying!

Why Milliwatting?

At the end of the day, I think taking our radios and antennas to their low-power extremes gives us a taste of what we can actually do with so little signal.

I remember shortly after I bought my first Elecraft KX1 in 2008, I was speaking with a local ham and he told me that a maximum output of three watts was pretty useless and that I really needed a minimum of five watts if I expected to make any contacts.

Part of me did feel like perhaps I’d bought something more akin to a toy–fun to look at and hold, but not terribly practical.

Then I started using that KX1 to make contacts and even carry on extended rag chews. Turns out, three watts gets a lot done!

Today, I’ll often run my MTR-3B with three watts or even less when activating a summit and the results are simply outstanding–fabulous DX and contacts galore.

I know 100mw is a proper compromise, but I like knowing what I can achieve with so little. Tinkering with it in the field and listening to signal reports (also reading RBN stats) gives me a good idea.

In an emergency situation? If I could only push 100mw into a decent antenna, I know it wouldn’t be ideal, but I know it wouldn’t be futile either.

Begali Adventure Dual

Another activation motivation was the opportunity to test my new-to-me Begali Adventure Dual paddles. Continue reading Testing the Ionosphere: A 100 milliwatt to 1 watt POTA Activation During a CME? Why not!? →

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

QRPp POTA: How many hunters can I possibly log with only 100 milliwatts–?

April 7, 2023 Thomas Witherspoon 6 Comments

As I walked out the door on the morning of Tuesday, March 21, 2023, I grabbed my Elecraft KX2, MM0OPX 40 meter end-fed half-wave, and a key I hadn’t yet taken to the field: my Bamakey TP-III!

I had a full day of errands, appointments, and carting my daughters to/from school, but I also had a good 90 minute window to play radio!

As I’ve mentioned previously, the Vance Birthplace (K-6856) is incredibly convenient this particular school term. I pass by it twice a week, and I feel incredibly fortunate because it’s a wonderful POTA site with POTA-friendly staff. They all know me quite well there at this point.

The Vance site is a small park and the only negative (from the point of view of a POTA activator) is if you have poor timing, you might arrive only to find that a large school group has taken over the site. This is especially a concern on weekdays during school hours–in other words, the time I usually activate Vance.

I pulled into the Vance site that morning and there were no vehicles there other than park staff. A good sign so far!

The only appropriate spot to activate at Vance (if you operate a portable HF station) is in or near the picnic shelter. The rest of the site is where visitors wonder through the old homestead and take guided tours.

I never set up my station in the middle of park activities or in a viewshed.

At the end of the day, we represent all Parks On The Air activators and the amateur radio community at large when we’re in public spaces. The last thing we want to do is detract from others’ park experience.

Before pulling any gear out of the car, I walked into the visitor center and asked the park staff for permission to set up in the picnic shelter. I always do this because if a school or tour group is scheduled to visit the site that day, they almost always need the picnic shelter and have it reserved.

Fortunately, no one had scheduled the picnic shelter, so the park ranger told me, “It’s all yours! Have fun!”

Proper POTA Flea Power!

I like shaking up each new activation in some small way so that it’s not a carbon copy of any previous activation.

Since, like most POTA activators, I visit the same local parks the bulk of the time, it adds a little extra challenge and fun to try different gear combinations, experiment with new antennas, or even (as in this case) try different power settings–! Continue reading QRPp POTA: How many hunters can I possibly log with only 100 milliwatts–? →

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

QRPp: Activate a park with ⅒ of a watt–? I had to at least try!

January 1, 2023 Thomas Witherspoon 33 Comments

In my last published field report, you might recall that I successfully activated a park using 500 milliwatts or ½ of a watt. I was so surprised by the results of using this QRPp power level I immediately made plans to push the power level even lower during my next activation.

Let’s face it, I was drunk with a lack of power!

QRPp

After my last field report, there were quite a few questions about the term QRPp and what it means. To be honest, I’m not sure if there’s an “official” definition, but here’s what is widely accepted as QRP power categories:

QRP: 5 watts to 1 watt (for some contest 10 watts = SSB QRP)
QRPp: Less than 1 watt to 100 mw
QRPpp: Less than 100mw

I don’t own a field radio that allows me to lower the output power to QRPpp levels. In fact, few of my radios actually allow me to lower power below one watt.

My Elecraft radios, however, do allow me to lower power output to as low as 0.1 watts or 100 milliwatts.

The plan

On Wednesday, December 7, 2022, my travel schedule shifted and it opened up the entire afternoon to play radio.

A rarity indeed!

It was very rainy and foggy that day and I didn’t have my ENO rain fly with me, so I decided to visit a park with a good picnic shelter to keep me, an my gear, nice and dry.

Fort Dobbs State Historic Site (K-6839)

I had four park options with covered picnic shelters within a 45 minute drive. I decided that I would try to activate Fort Dobbs State Historic (since it had been a couple months since I’d visited) and Lake Norman State Park would be my back-up plan.

Fort Dobbs is a small park, so I called in advanced and asked for permission to do the activation and also asked if their picnic shelter was reserved.

The rangers there know me, so the phone call was pretty quick–no need to explain POTA nor my motivations. They told me that on rainy/foggy December days they have so few guests that I was welcome to use the picnic shelter or even the entire park if I wished (perhaps an ideal time to erect a Rhombic antenna–okay, just kidding!).

The Dobbs park rangers an volunteers are the best!