Tag Archives: Icom IC-703 Plus

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

POTA Plan C: Swapping antennas and rigs at Tuttle Educational State Forest

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After the success of my previous day’s activation at Fort Dobbs State Historic Site, I decided to take the Icom IC-703 Plus out for yet another activation.

As I mentioned in the previous post, the IC-703 has not gotten a lot of outdoor time this year because I’ve had issues with the electronic keyer locking up when using the radio with end-fed antennas.

Of course, there are a number of ways to mitigate or radiate the RF that could be coming back to the radio, so at Fort Dobbs, the previous day, I used a simple common mode choke. It seemed to do the trick.

I was curious if using a common mode choke might be the only solution needed to solve this problem, or if I’d need to perform a mod to my IC-703.

I was ready to test the IC-703 again.

I had a fair amount of antenna options in the trunk of my car, so on the way to Tuttle Educational State Forest (on Friday, October 7, 2022), I considered a few options to shake things up a bit.

Since I was feeling comfortable that the common mode choke was taking care of things, I decided to push the limit a bit and deploy an end-fed random wire antenna. I didn’t have any of my mini portable 9:1 random wire antennas in the car (PackTenna, Tufteln, etc.), but I did have another solution: the Chameleon MPAS Lite.

The cool thing about the CHA MPAS Lite is that while it’s primarily designed to be a vertical antenna with counterpoise, it can be reconfigured and deployed a number of ways including as a simple end-fed random wire antenna.

After giving it some thought, I decided it might be fun to deploy it as an inverted V random wire. In fact, here’s a diagram from the MPAS Lite manual of exactly what I planned to do.

I’d be using the MPAS Lite counterpoise as the radiator, so I wouldn’t have the optional second counterpoise as seen in the illustration above. That’s okay, though, because I was feeding the antenna with Chameleon’s 50′ RG-58C/U cable with in-line choke; the shield of the coax would act as the antenna counterpoise.

This is the same coax cable I used the previous day. Continue reading POTA Plan C: Swapping antennas and rigs at Tuttle Educational State Forest →

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

POTA with the Icom IC-703 Plus: Working a serious SWR problem first, though!

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If you’ve been here long, you’ve no doubt noticed that I have a sizable collection of QRP radios I take to the field.

Although I have some favorites, I try to rotate all of my radios in the field and even pair them with different antenna combinations as much as possible. If I only owned one field radio, I’d shake things up by pairing my one radio with different antennas deployed different ways during my POTA/SOTA activations.

I get a real thrill out of testing different combinations, actually, and I feel like it keeps me on my toes because I don’t get too comfortable with any one setup in the field.

No doubt, using a wide variety of radios gives me a more informed perspective when beta testing or evaluating new radio models.

That said, there is one radio in my collection that has been overlooked too many times: my Icom IC-703 Plus.

Many of you have noticed this, in fact.  I’ve gotten several emails and comments asking, “So Thomas…when are you taking the 703 out again–?” 🙂

When I purchased the ‘703 from my buddy Don a couple years ago, I imagined taking it to the field very regularly. I always thought it was a cool little radio and with its built-in ATU, it’s quite compact for a tabletop-style rig.

Thing is, each time I’ve taken it to the field, I’ve had issues with the electronic keying that I did not have when using it in the shack. It’s quite sensitive to RF, so end-fed antennas seem to create unwanted dits and dashes in the keyer.

The simple fix, I hoped, was simply using an in-line common mode choke to keep the RF away from the radio. Thing is, the IC-703 has an SO-239 antenna port and two of my common mode chokes are BNC. I meant to purchase a BNC-to-PL-259 adapter at the Shelby Hamfest, but picked up the wrong item (I should have been wearing my glasses).

Then I remembered that my Chameleon 50′ RG-58C/U cable not only has an integrated in-line choke, but also PL-259 connectors. This could work! Continue reading POTA with the Icom IC-703 Plus: Working a serious SWR problem first, though! →

Antennas, Field Reports, Kits, News, Portable, POTA, QRP

Putting the KM4ACK End-Fed Half-Wave on the air at Table Rock!

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Lately, I’ve been in the mood to build kits.

I say “lately” but in truth I’m always tinkering with something in the shack.

The radio room/office at my QTH is pretty small, though, and I don’t have a dedicated, full-time workbench. I’ve been mentally re-arranging the room and trying to sort out a way to make space for one because it would be so nice to have a spot where my soldering iron could remain hooked up at all times.

For the moment, when I work on kits I use our dining room table so I try to stick with one or two session kits as opposed to the multi-day variety.

KM4ACK EFHW

KM4ACK Image

A number of readers and subscribers have asked me to check out the KM4ACK 49:1 End-Fed Half-Wave antenna kit.  This kit is produced by Jason (KM4ACK) and purchasing his kits supports his excellent YouTube channel.

I have a lot of field antennas, so I don’t really need another EFHW, but then again I like having a dedicated resonant wire antenna with each of my radios and, (hey hey!) it’s a great excuse to build a kit!

KM4ACK Image

I purchased the KM4ACK kit and received it within a week. Building the antenna was incredibly straight-forward. Jason packaged the components in small bags so finding parts was easy. I really appreciate kits that aren’t one large “bag-o-parts.” Continue reading Putting the KM4ACK End-Fed Half-Wave on the air at Table Rock! →

Field Reports, News, QRP

POTA Field Report: Activating the BRP with my new-to-me Icom IC-703 Plus

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When my buddy Don told me he was selling his Icom IC-703 Plus a few weeks ago, he caught me in a (multi-year long)  moment of weakness. I asked his price and followed up with a PayPal transaction without giving it a lot of thought. It was a bit of an impulse purchase, if I’m being completely honest, but he definitely gave me a “friends and family” discount.  (FYI: Don is the same enabler that made this purchase happen.)

I’m thinking the IC-703 Plus might be a good first HF rig for my daughter (K4TLI) and, of course, it’ll be fun to take it to the field from time to time.

Of course, the best way to get to know a radio, in my opinion, is to take it to the field. So that’s exactly what I did last week (January 13, 2021).

Blue Ridge Parkway K-3378

Against my better judgement, I decided to make a video of the activation. I mean, what could possibly go wrong operating a radio for the first time in the field? Right–?

I picked out an “easy” park for this activation: the Blue Ridge Parkway.

Although most of the parkway around Asheville, NC, is closed to vehicle traffic, the Folk Art Center is open year round and a very convenient spot for POTA.

Gear:

I paired the IC-703 Plus with my Chameleon MPAS 2.0 vertical antenna. I was curious how easily the IC-703’s internal ATU could match the MPAS 2.0: turns out, pretty darn well!

I started the activation on 40 meters phone (SSB).

Almost immediately, I logged a few contacts and that quickly built my confidence that even the default voice settings were working well on the IC-703 Plus.

I then moved to 40 meters CW and used the CW memory keyer to call CQ (I pre-programmed this before leaving the QTH that day).

Then I experienced a problem: when someone answered my call, my keyer didn’t work properly. For some reason, it was sending “dit dash” strings from both sides of the paddle. I’m not entirely sure what happened but assume there was either a radio glitch or a small short in my paddle cable. After fiddling with the IC-703 for a bit, I pulled out my Elecraft KX2 and finished the CW portion of my activation. (Always carry a spare radio, I say!)

Actually, I assumed since I was using the IC-703 for the first time, there could be hiccups as I did not do a full rig reset prior to putting it on the air–settings were essentially what they were when Don had the radio.

Here’s one of my real-time, real-life no edit videos of the entire activation, if you’re interested:

Back home, I connected my CW Morse paddles up to the IC-703 and it worked perfectly. Even though I checked the connections in the field, I must assume one of the plugs simply wasn’t fully-inserted. It hasn’t repeated this since.

Despite the CW snafu, I’m very pleased with the IC-703 Plus so far. I like the size for tabletop operating and it’s actually surprisingly lightweight.

If you own or have owned the IC-703, please comment!