WWFF – WB3GCK QRP Amateur Radio

More Gabil on a Table

One of my favorite ways to use my Gabil GRA-7350TC antenna is on a picnic table within arm’s reach for easy adjustment. It’s a configuration I wrote about in a previous post. I wanted to try something similar using my Elecraft KH1, but with a minor twist.

What I had in mind was using the Gabil antenna on its tripod with most of the coax eliminated. To do this, I used a Gabil common-mode choke between the antenna and the KH1. Besides helping to keep RF off ‌the shield, it also provided a little extra coax length. This makes it a little easier to connect to the radio.

I had most of what I needed, except for an adapter to go from the choke to the radio’s antenna input. After scouring through my collection of connectors and adapters, I found what I needed: a PL-259 to BNC-M adapter. These aren’t very common, but I had acquired one somewhere along the way.

Now, I just needed a picnic table. For that, I headed to Evansburg State Park (US-1351, KFF-1351). I set up my Gabil antenna at a picnic table I’ve used several times before. I attached two 17-foot radials, which I laid on the ground. Using an SWR meter, I quickly tuned the antenna for an SWR of 1.3:1 on 40M. I swapped out the SWR meter for my KH1 and got on the air.

The Gabil vertical connected to the KH1 via a common-mode choke

After spotting myself, I logged my first 10 contacts in about nine minutes. Not bad for 3.5 watts to an eight-foot vertical. I hunted a couple of park-to-park contacts before moving up to 20M. I tuned around the band, and it seemed somewhat quiet. I called CQ a few times before getting a call from a very loud F4WBN. Right after that, I worked a station in Texas. Then the activity came to a screeching halt. My guess is that it was a little too early in the morning for 20M.

After spending more time on 20M than I should have, I went back down to 40M and picked up a couple more park-to-park contacts. I logged several more contacts after that before packing up. My one-hour effort netted 24 contacts, including five that were park-to-park.

My Gabil is an early version with scale markings applied with a sticker, rather than the engraved markings on the newer ones. I’ve already experienced a little peeling, so I wanted to add some band markings of my own. My plan was to use a Sharpie to mark the coil settings. I figured if I forgot to pack an SWR meter, I could at least get the antenna close enough for the KH1’s internal ATU to handle. It was a brilliant plan, except that I forgot to bring the pen. Doh! (Note to self: Add a Sharpie to the backpack.)

All-in-all, the Gabil proved its worth once again. It’s quick to setup, gets the job done, and it packs down small.

72, Craig WB3GCK

A Pair of Central PA POTA Quickies

My (far) better half and I spent most of the week in central Pennsylvania helping a family member recovering from surgery. Although the mornings focused on getting the grandkids off to school and making sure the grand-dog got walked, I squeezed in a couple of short activations.

Not sure how much radio time (if any) I would have this week, I packed light. I only brought my Elecraft KH1 and some antennas that I usually keep in the truck.

Capt. John Smith Chesapeake National Historic Trail (US-4567)

On our second day in central PA, I had to drop my granddaughter off at her friend’s house to catch the school bus. Since I was only about five miles away from a boat launch on the Susquehanna River in northern Lancaster County, I drove over there for a short activation of US-4567.

Early morning view of the Susquehanna River

Except for a few early morning cyclists, the place was empty. I parked my truck in a spot that’s within 100 feet of the river and got set up. I didn’t have much time, so I stayed in the truck and used a 17-foot whip and my homebrew loading coil. Up in the cab, I used the KH1 and my CWMouse paddles.

KH1 and CWMouse paddles. This was the same setup I used for both activations this week.

The A Index was a whopping 29, so I wasn’t expecting great results. As is often the case, Mother Nature fooled me. The 40M band seemed really hot; I made my first ten contacts in about nine minutes. The KH1 was putting out a whopping 3.5 watts.

Towards the end of my activation, I noticed that the Reverse Beacon Network and other POTA spotters were showing my frequency 500 kHz higher than my dial frequency. Although I had the KH1’s filter on the narrowest setting, it sounded very broad to me. Doing some poking around the menus, I found the problem. Somehow the mode had changed to USB. Most likely, it resulted from some fat-fingering on my part. Doh! A quick button press or two and all was right with the world. Actually, I made most of my contacts with the mode set to USB instead of CW, so it wasn’t the worst mistake I could have made.

I wrapped things up after 30 minutes on the air, with 20 QSOs in the log (including two dupes). All of my contacts were on 40M. Although 40M seemed long (with several Michigan and Missouri stations), I had a park-to-park contact with my friend N3CU. Ken was activating a park towards the southern end of the county. A park-to-park QSO with KB1SF in Michigan turned out to be park number 1,000 for me as a hunter. It was a fun activation, but I needed to get back to the house.

PA State Game Lands 246 (US-8941, KFF-5862)

The next morning was pretty much the same situation, but this time I activated some nearby state game lands. Although this location is only about 10 minutes away from where I was staying, it had been more than a year since my last activation there. I was long-overdue for a visit.

I used the same setup as the day before, but this time making sure the KH1 was actually in CW mode. Like the previous day, the 40M band was very active early in the morning. This time it only took about seven minutes to log my first 10 contacts, and they rolled in steadily after that.

I finished up with 31 contacts—one was a dupe—in just over 30 minutes of operating. Again, all of my contacts were on 40M. I would have tried other bands, but the hunters kept me busy on 40M. Satisfied with the contacts I made, I headed back to the house for breakfast with the rest of the family.

Stationary-mobile at PA State Game Lands 246

I’ve come to the conclusion that the KH1 really plays well with the 17-foot base-loaded vertical mounted on the back of the truck. Putting out around 3.5 to 4 watts, the little KH1 was really getting out. Thanks to all the early-rising hunters out there for a couple of fun activations this week.

72, Craig WB3GCK

Using the Gabil Whip with the KH1

A while back, I came across a video by Aaron W4ARB in which he showed how to adapt the whip from a Gabil GRA-7350TC antenna for use with the Elecraft KH1. The Gabil whip is just over seven feet long, providing some height advantage over the KH1’s 45-inch whip. Since I had both the KH1 and a Gabil antenna, I gave it a try.

Aaron’s video gives you all the details you need, so be sure to go check it out. Since the Gabil and the KH1 whip use different thread sizes, Aaron found an inexpensive adapter to make it work. It reduces the M10 thread the Gabil whip requires to the M4 thread mount on the KH1. The longer whip weighs a bit more than the KH1’s whip, so Aaron used the KH1 on a picnic table with a Tufteln Right Angle Adapter. I just happened to have one of those in my KH1 kit.

To test this out, I drove out to French Creek State Park (US-1355, KFF-1355) and set up at a secluded picnic table. Using the adapter, the Gabil whip attached perfectly to the KH1 angle mount. I set up for 40M, using the Elecraft AXE1 coil and a 33-foot counterpoise wire. Aaron elevated his counterpoise wire for improved efficiency. Being lazy by nature, I just laid mine on the ground.

I set the KH1’s antenna switch to the 17M/15M position to use less loading inductance. In order for the KH1’s ATU to achieve a decent match, I needed to partially collapse the Gabil whip by two sections. In this configuration, the antenna is only slightly longer than the KH1’s whip, but it seemed to get out OK. I easily made the requisite 10 contacts, including a two-way QRP park-to-park contact with a station in Michigan.

Given that I had to partially collapse the Gabil whip on 40M, I’m not sure it provides a significant improvement over the KH1 whip. It certainly works, though. A smaller loading coil would be great.

The Gabil whip antenna mounted on the Elecraft AXE1 coil

At this point, I did a little antenna experimentation. Using the fully extended Gabil whip, a 13-ft counterpoise wire, no AXE1 extender, and the switch in the 17M/15M position, the KH1 easily found a match on 20M. I also got it to load on 30M, but I neglected to make a note of the exact configuration I used. I’ll have to try that again another time.

My setup. The Gabil whip is mounted directly on the right angle adapter for 20M

The longer whip really seemed to work well on 20M. In short order, I worked nine stations, including five in Florida. I packed up after an hour on the air, with 20 contacts in the log.

This was hardly a scientific evaluation, but the KH1 and Gabil whip is a combination I will definitely use again. Thanks to W4ARB for the idea and the great video.

72, Craig WB3GCK

Hunting Skeeters in the Rain

I arrived home the night before from a week-long vacation in North Carolina and still had some unpacking to do and things to catch up on. Still, I wanted to take part in the Skeeter Hunt QRP contest, which is something I look forward to each year. Despite the weather forecast for heavy rain, I got on the air for the first one and a half hours of the contest.

I drove over to Valley Forge National Historical Park (US-0761, KFF-0761), hoping to make enough Skeeter Hunt contacts to complete a POTA activation at the same time. Since I was focusing on contest contacts, I didn’t bother to spot myself on the POTA and WWFF sites.

It was drizzling when I got to the park, so I operated from the truck. Equipment-wise, I used my trusty Penntek TR-35 transceiver, along with a 17-foot whip and my homebrew loading coil. I started out on 40M, and it sure was rough going, producing only three contest contacts. I probably spent too much time on that band. Eventually, I gave up on 40M and moved up to 20M. The skeeters were more plentiful up there.

The rain was starting to come down heavier, and I still had some errands to run, so I packed it in. After about 90 minutes, I ended up with 13 skeeters and a couple of non-skeeters in the log.

Hunkered down in the truck, wearing my official Skeeter Hunt t-shirt

As I was leaving the park, the skies opened up, and a torrential rain ensued. My timing couldn’t have been better. Despite all the rain, it was a good time. I would have liked to stay longer, but I had things to do and places to be.

Many thanks to Larry W2LJ and the NJQRP club for organizing this fun event. I’m already looking forward to next year.

72, Craig WB3GCK

Stormy Monday Activation

Angry-looking clouds. Unsettled geomagnetic conditions. That sounds like a good time to go activate a park with a compromised antenna. So that’s what I did. When you get the opportunity to go play radio in a park, you just have to go for it.

Early on a Monday morning, I made a trip up to Evansburg State Park (US-1351, KFF-1351). We had some storms overnight, and there were some lingering dark clouds around. So, I hunkered down under a picnic pavilion. I didn’t have much time, so I went with the Elecraft KH1 and its internal whip. Along with the whip, I used a Tufteln 90-degree adapter. For keying, I used my trusty CWMouse paddles on my clipboard.

Picnic Table-portable with the KH1 at Evansburge State Park — Picnic Table-portable with the KH1 at Evansburg State Park

I installed the AXE1 extender coil for 40M and got started. The noise floor was very low, but I had to endure the occasional loud static crashes from storms in the area. Despite the unsettled geomagnetic field, the first five QSOs came quickly. After working a couple more, I gave 30M a try and logged three more.

With 10 contacts in the log, I removed the AXE1 and moved up to 20M. There was a bit more activity up there, and I made nine more contacts in short order. I shut down after an hour on the air with 19 contacts. That included four park-to-park contacts.

There are far better antennas than the KH1’s 45-inch whip, but probably none faster to deploy. Not to mention the huge fun factor in making contacts with such a diminutive antenna.

72, Craig WB3GCK

Trying a 29-Foot Wire with the KH1

When I tested a 35-foot non-resonant wire with my KH1 last week, I was pleased with the results. Continuing with that theme, I thought I’d try a 29-foot wire, another popular non-resonant length.

I drove back to Valley Forge National Historical Park (US-0761, KFF-0761) and re-created the setup I used last time. To support the wire, I again used my homebrew drive-on mount to support a partially extended 31-foot Jackite pole. I’m guessing the pole was up about 27 feet, give or take. I set up my camp chair nearby and ran the wire over to the KH1. Starting off, I used a 17-foot counterpoise wire.

My KH1 on a kneeboard with the roll-on antenna support in the background

First, I checked to see what kind of match the KH1 would find on its five bands. The SWR was very low on all bands except for 20M, where the best the KH1 would do was around 2.4:1.

I started my activation on 40M, and the wire seemed to get out pretty well. Although the band was noisy with static crashes, I made my first ten contacts in about 11 minutes. I eventually moved up to 30M, but I only had one hunter there.

At that point, I took a break to experiment with counterpoise wires. I tried both 29-foot and 13-foot counterpoise wires, but neither of them improved the match on 20M. I also tried repositioning the counterpoise with no luck.

I left the 13-foot counterpoise wire attached and went back to 40M. I made an additional handful of contacts on 40M before trying 17M. On 17M, I picked up three more before calling it quits.

Admittedly, I had high hopes for the 29-foot wire. I’ve used that length a bunch of times, although usually with a 9:1 unun and rigs with more robust tuners. In any event, it worked well on bands other than 20M. I managed 26 contacts in a little more than an hour.

On the drive home, I thought about some ways to improve the match on 20M. I’m not sure any of them are really worth the effort, though. For now, I’ll just stick with 35-ft when I use a random wire with the KH1.

72, Craig WB3GCK

Trying a 35-foot Wire with the KH1

I headed back to Valley Forge National Historical Park (US-0761, KFF-0761) to try out an antenna configuration I didn’t get to during my last visit. I was eager to see how well my Elecraft KH1’s internal ATU would match it.

The antenna in question is just a 35-foot wire with a 17-foot counterpoise. There’s nothing novel about this configuration, as it’s a popular choice for the Elecraft KH1. Since I bought the KH1 last summer, I had never tried directly feeding a random wire. Since I already had the 35-foot wire I used in North Carolina last year, I gave it a go this morning.

To support the 35-foot wire, I used a 31-foot Jackite pole on my homebrew drive-on mount. I sloped the wire down to my camp chair. I laid out the counterpoise wire in the grass and used a binding post to a BNC adapter to connect both wires to the KH1. To hold the KH1, I used a kneeboard from Tufteln strapped to my leg. I used my CWMouse paddles for sending.

Before starting my activation, I tried the KH1 on each of its five bands. The KH1 found a 1:1 match on both 40M and 30M. The 20M band gave the highest SWR at 1.6:1; however, the KH1 was putting out a full five watts on that band. On both 17M and 15M, the SWR was a respectable 1.3:1.

My 31-foot Jackit pole on a homebrew drive-on mount

Satisfied that the KH1 was happy with this antenna configuration, I got underway on 40M. The wire seemed to get ust fine, but it’s hard to judge an antenna’s performance on the air. There are just too many variables in play. Anyway, I made contacts all up and down the East Coast and out to the mid-west. I ended up making contacts on 40M, 30M, and 20M. It was a bit too early in the morning for 17M and 15M.

After an hour and 10 minutes, I wrapped up with 25 contacts in my log with nine park-to-park contacts. Not too bad for early on a Monday morning, I suppose.

Overall, I was very happy with the 35-foot wire with the KH1. I think it might be a permanent addition to my backpack. It certainly doesn’t take up much room. I’ll probably be using it for the upcoming Flight of the Bumblebees contest.

72, Craig WB3GCK

It’s Been a Minute or Two

Except for Field Day, I’ve been mostly off the air for the past few weeks. To remedy that, I took advantage of a rare day with outstanding weather for a quick, early-morning activation at Valley Forge National Historical Park (US-0761, KFF-0761).

Since I have to be careful with sun exposure these days, I drove straight to an area I knew would have shade all morning. My original plan was to experiment with a wire antenna with my Elecraft KH1, but for reasons I won’t bore you with, that didn’t happen. Instead, I used a whip antenna on my truck and ran coax over to my camp chair and table. My handy-dandy propagation app showed unsettled geomagnetic conditions, so I went with my longer 17-foot whip and homebrew loading coil.

Despite the poor band conditions predicted for 40M, there was no shortage of early risers hunting parks. Although there was a lot of static from impending storms, it only took five or six minutes to make my first ten contacts. After logging 20 contacts on 40M, I changed bands. I made a half-dozen contacts each on 30M and 20M.

I finished up with 32 contacts after an hour and 10 minutes on the air. Eight of those were park-to-park, including one with my friend Ken N3CU, and one on each of the three bands with Tom KG1A in Florida.

My antenna taken from my shady location — My antenna, as viewed from my shady location

I packed up and headed home to cut my grass before the rain moves in tomorrow. Except for a minute or two of sheer panic when I temporarily misplaced the keys to my truck, it was a good morning and fun to get back out in a park.

72, Craig WB3GCK

In Pursuit of a Kilo

Yeah, I know. That title sounds bad. What I’m talking about is finally making one thousand contacts at French Creek State Park (US-1351, KFF-1351). I’ve activated this park a bunch of times over the years, but I have yet to get that POTA Kilo Award. I was bound and determined to wrap it up this morning.

I started off this morning 36 contacts shy of the one thousand mark. Since we’re gearing up for a bit of a heatwave here in southeastern Pennsylvania, I headed out early to beat the heat. I was hoping for good band conditions and lots of early-rising hunters.

Hopewell Lake in French Creek State Park

My setup today was my usual Penntek TR-35 (5W, CW) and my 12-foot base-loaded whip. I normally use my Elecraft T1 tuner to touch up the SWR on the lower bands. This morning, though, the T1 refused to find a match. It took me a few seconds to realize that I forgot to set the tap on the coil. So the antenna had a bit more inductance than it needed. Doh! Once I corrected that faux pas, all was right with the world.

Given the early hour, I started out on 40M. It didn’t take long for the hunters to show up. After 12 minutes, I had my first 10 contacts logged. Although not at a breakneck pace, I had a steady stream of callers. When I hit 20 contacts, I was feeling like I had a shot at getting the 36 I needed.

The activity eventually dried up on 40M, so I moved up to 30M. After an hour on the air, I had 33 contacts logged. And then it slowed way down. After an hour and 15 minutes, I finally had the 36 contacts I was looking for. Thanks to W8AJF in Ohio for being number one thousand from this park.

My long-overdue Kilo Award at French Creek State Park

I made a couple more on 30M before dropping back down to 40M for a few minutes before shutting down. After 90 minutes on the air, I had 43 contacts—seven more than I needed. The temperature was warming up, so I packed up and headed off to run a few errands.

I don’t normally get too wound up about POTA or WWFF awards, but I do love a challenge now and then. Thanks to all the hunters who came out to play this morning.

72, Craig WB3GCK

Crowded Day in the Park

I tend to avoid activating my local parks on weekends. In this area, parks can get pretty busy in the summer, especially when the weather is nice. Being an old, retired guy, I have the luxury of doing my portable operations during the week. Sometimes, though, when the opportunity presents itself on a weekend, you just have to go for it.

I was overdue for a visit to Norristown Farm Park (US-4363, KFF-4363). Being a Saturday with reasonably nice weather, I expected the park to attract a fair number of visitors. To avoid the crowds, I headed out early.

When I rolled into the parking lot at 0800 (local), it was about half full and filling up quickly. It looked like some sort of organized event was forming up. I only planned to operate for an hour hoping to finish up before their event got started.

I set up my usual 12-foot loaded whip and TR-35 and got started on 40M. Electrical noise can sometimes be an issue at this location, and that was the case today. Fortunately, the bands were in reasonable shape, so I could copy all but the weakest stations. (My apologies to anyone I missed.)

Noise notwithstanding, I made my first 10 contacts with no problems. When things slowed down on 40M, I switched to 20M. Up on 20M it was wall-to-wall with contesters, so I stuck to the less-crowded WARC bands. The 30M band was fairly productive, but I only had three contacts on 17M. One of those contacts, however, was with IK4HLO in Italy. After just under an hour on the air, I had 29 contacts in the log with three (known) park-to-park contacts and the one DX QSO.

Apparently, the organized event was a walk/run event benefiting a charity. As I was taking down my antenna, a group of participants left the parking lot and took off down the multi-use trail. Driving out of the park, I noticed that the other parking areas were nearly full. So, my early start turned out to be an excellent strategy.

Have a great weekend!

72, Craig WB3GCK