mAT-705 – Accessory Detour

The mAT-705 next to the IC-705 (on a tripod)

Antenna tuners are a thing to have, right? If you’re going to use a less than adequate antenna or just a random piece of wire, a tuner is going to come in handy. At home, I have an attic dipole that’s strung from one side of the attic to the other. I usually use my LDG tuner for that with my IC-7100. I have the LDG Z-11 Pro II and it’s awesome. It’s got a battery clip inside that eats a pile of AAs, it runs off of rig power, and it’s not too cumbersome, but I was really looking for a more portable option. The mAT-705, made specifically for use with the IC-705, looked like a pretty good idea. These are my initial impressions of that piece of gear.

Pros. The box is small and rugged. It fits in an admin pouch on my backpack or can be dropped into any number of waterproof boxes that I have for use when I’m outdoors. It’s got BNC connectors and a single 1/8″ TRS cable to connect it to the IC-705. It tunes up FAST and works really, really well in my testing so far. That’s using both my attic dipole and the MP1 Super Antenna. It’s definitely the right size and it hits all the right notes when it comes to being a solid tuner.

Cons. Well, the bummer is in changing the battery. I honestly hope that I never have to do this in the field. It takes a 9v battery that is in a most unfortunate position. Take a look:

The guts of the mAT-705 tuner.

To replace the battery, that entire assembly has to come out. In the manual, it mentions removing the rear 4 screws and pulling it out. That’s great if it works. But the battery fits in very tightly. That means taking off the front panel to push a bit to get it out. It doesn’t feel good to do this. It’s not a simple sliding motion. On the one hand, it’s great that it doesn’t slide around in the case, but it does make changing the battery feel treacherous. I’ll also add that for someone who regularly breaks things because he forgets that not everything responds well to torque, I have to really think it through.

Another downer with this is that the panel one is supposed to tug on is attached only by the BNC solder joints. Again, not instilling confidence.

Solder joints connecting the panel to the PCB.

If it turns out that the battery lasts for a long time, this won’t be something that I sweat very often. But if I find myself doing this more than once a year, I might figure out a way to power it externally because snapping that PCB would be a bummer.

There are Pros and Cons. What are the things that just sap the joy out of opening a piece of gear? I don’t know what to call them, but I’ll list the two that hit me.

One of them is a dead battery. Yeah, the battery was dead out of the box. This is how I discovered the pain of opening the case so soon upon receiving it. The other killjoy was finding that the enclosed allen wrench didn’t work. It was slightly too small to turn the screws. That was frustrating. Almost frustrating enough to return it, if I’m completely honest.

What’s the net? It’s a solid tuner. I have confidence that it will be great for my particular purposes. Knowing what I know now, would I suggest it to another new IC-705 owner? Maybe.

My particular requirements are tied to my lifestyle. I’m a dad and husband living through a rather singular pandemic who doesn’t have a ton of time for his hobbies. When I do get a chance to get out and play with my radio, I have to be ready to go. It feels like emergency readiness, but it’s more relaxation readiness. If I have to pull any component out of my desktop chain to get out the door, that comes out of the minutes that I’m not on the air or heading to the field. So I feel like the mAT-705 is going to be very helpful on that front. It’s small, light, and can live in my backpack waiting patiently for me to get out the door.

I will continue to update my thoughts on this piece of gear as I get out more in the coming months. I want to give it a fair shake.

IC-705 – Part 3: GPS

Your IC-705 will NOT look like this when you’re getting GPS data.

I’m slowly stepping my way through all that the IC-705 has to offer. I still consider myself quite a new ham, so there are features that I know little about that I’m starting to have a lot of fun with. But for a moment, I’m going to indulge something that I’m really getting geared up for this winter: field operation.

In my part of the world, it gets quite cold in the winter. I’m not one to shy away from that and I do indeed love hiking and camping all winter long. Especially if it’s quiet and there is some degree of solitude. In these Strange Times, it’s sometimes nice to take a minute and step outside where we can enjoy the absence of certain things. But there’s no reason I can’t take my radio along, right? And there really shouldn’t be any reason that, given my recent acquisition, I shouldn’t take my radio hobby along for the hike.

There are a lot of operators out there who are far better at field operation than I. OH8STN is definitely one of them and I follow his work closely. The sentiment we share is that in 2020 a radio should do everything with one wire – if there has to be a cable at all. There’s no reason that a single USB cable shouldn’t carry with it all the power of the radio. And with the IC-705, it does.

I wrote before about syncing a laptop’s time using my Kenwood TH-D74 so that the clock is as accurate as it can be for modes like FT8. That still works and it can be done over bluetooth. But I’m not using the TH-D74 for FT8 and I’m already plugged into the IC-705 which has a GPS, so why not leverage that?

This whole entry is more of a way for me to remember what I did to get to the point where it worked and less about trying to teach anyone anything. There are many links to places that taught me what I know. But here are the high points.

The IC-705 really only needs one bit of configuration.

SET > Connectors > USB (B) Function -> GPS Out -> ON

Thanks to Ryan on the IC-705 list for reminding me of that. See also Painful Radio UI/UX.

With the GPS turned on and that setting in play, the unit will push data out via the USB as soon as it has acquired a lock. A trick? In my experience, it will come out as the port that does NOT do rig control. Every operating system does this differently and you can’t necessarily predict which device will show up where (even when you tell the OS to honor your setup) so it’s good to know that there’s a difference and not get frustrated and stare at a screen for an hour like someone I know.


Now on the computer side, it’s a question of finding some software that will listen to a GPS and go from there. I used GPS2Time on Windows and gpsd on my Raspberry Pi. You can get all the instruction you need from VK4ADC’s site for GPS2Time and THIS is a great tutorial on getting things going with the Raspberry Pi. Though I will caution you to double check the device that is configured for chrony. That tutorial names a device and you just need to confirm that the one you need is the one you configure. Or again, you’ll be staring at a screen like our friend.

So far, everything seems to be working exactly as I would like. It also gets me down to a single connection to the computer. In 2020 that is definitely as it should be.

More Bags

OK, OK, OK… My wife tells me that I have a “Bag Problem.” I like to think of it as having the right tool for the job. That said, I’ve been playing around with a million different configurations of my existing collection to find a good solution to the problem of how to carry the IC-705.

After looking at a ton of pictures of other portable operators’ load-outs, I saw that there was an item that kept showing up. It was a cylinder that was used by some for camera lenses and others for electronics. As it turns out, it’s a “Tactical Water Bottle Holder.”

Yeah. A “Tactical” water bottle holder. And it can hold a bottle of wine, too!

The point is, when I saw it, I knew that it was perfect for the IC-705. I ordered it up and it fit perfectly. There is enough padding to it to protect the radio. It also has enough room for the mic and some other cables. On the front of the bag, there’s a pouch that could hold an antenna tuner like the MAT-705 or a notebook or more cables. Also, it attaches to the side of my sling pack nicely using the molle system on the sling. It’s really a great solution!

One more time… Tactical Water Bottle Holder.

The IC-705 side by side with the bag.
The IC-705 in the bag with the hand mic.

I will definitely share more if I make changes to this. But for now, I’m going to let this solution of the water bottle bag with my Maxpedition Sitka Gearslinger.

Sling and Water Bottle Bag