I’ve been running my NexStar 6SE scope in the field using an old 12V 7-Ah gel cell battery for awhile now, but it’s kinda heavy and has to sit on the ground, meaning I have to pay attention to not getting the power cord wrapped around the mount as I slew the telescope. I really wanted to find something that was light enough to attach to the arm of the mount itself but still had enough power in it to run the scope for at least an evening. Surfing some of the message boards, I found several reports of people using battery packs from TalentCell. The message board posts claimed up to several nights of observing with their battery packs. It sounded like I had found the answer.Continue reading
This is a little tidbit I stumbled across while reading KE7X’s “The Elecraft KX3 – Portable” manual. I was interested in adding a PTT switch of some sort to go with the lightweight computer headset I intended to use for portable operation with my Elecraft KX3. It’s possible to use the XMIT button on the front panel for PTT, but I wanted something a little more convenient.
A KX3 menu setting, a simple momentary SPST pushbutton switch, and a repurposed ballpoint pen housing ended up doing the trick. I think the picture below is worth a thousand words:
One of the things that intrigued me about my new Elecraft KX3 is that it has a built-in serial interface (the ACC1 port). I thought it might be a fun project to see if I could interface it with my Google Nexus 7 Android tablet via bluetooth, reminiscent of my old GOLog project with the Serial Sender. I couldn’t find much in the way of Android apps that would interface to the KX3 in a useful way, but I decided to put together a bluetooth-serial interface and then see if I could write an app of my own that might be handy for, say, SOTA activations and Field Day.
Although I haven’t gotten anywhere yet with writing my own Android app, I did come up with a bluetooth serial interface that works with the KX3. The detailed project description is here. A PC board is available from FAR Circuits, and the project is designed to fit nicely into an enclosure with a built-in 9V battery compartment.
If you’re a backpacker or hiker and you’ve been looking for a way to strap your HT to your backpack within easy reach, you might be interested in a pouch I found for my VX-8GR. Almost every HT these days comes with a belt clip, but on the trail it’s easy to knock something like that off your belt and either break it or lose it. I’ve always wanted something more secure, that also puts the HT up on my backpack shoulder strap where it’s easy to access. It turns out that the makers of tactical (military) equipment are putting out some pretty neat stuff these days, and I found this pouch from Condor:
I just posted another of my quick reference card creations–this time for the Yaesu VX-8GR. It’s a great little HT packed with tons of features, but if you’re getting a little older like me, it gets harder to remember how to use all those features if you don’t use the radio often enough. Anyway, mine’s designed as a quick reference to things I’d need to do on the trail, and it doesn’t encompass everything that the radio can do. I share it here in case it’s useful to anyone else.
Did I mention that I just received my new Elecraft KX3 (#5522) ham transceiver? Wonderful rig (but more on that in another post). The KX3 ships with your choice of a USB cable or a serial cable for interfacing with your PC. With either of these cables, you can use Elecraft’s KX3 Utility software to update the KX3’s firmware, or you can otherwise control the rig with suitable software (say, Ham Radio Deluxe) running on your PC. At any rate, I received the USB cable with my KX3.
I’m interested to see if I can rig up a bluetooth connection between my KX3 and my Android tablet, though, and it seemed that a good place to start would be to fabricate a serial cable, to which I could ultimately connect a serial-to-bluetooth adapter of some sort. Here’s how I did it.
I couldn’t have known when the morning started that I would be part of SOTA history by day’s end.
Okay, that’s probably a bit of an exaggeration. But I did enjoy the privilege to be a part of (and witness to) the achievement of a new SOTA personal best for Steve wG0AT and Frank K0JQZ (and me too, for that matter):
Three SOTA summits in one day. Fourteen big, juicy SOTA activator points.
Today, my wife Dot and I tagged along with Frank K0JQZ and his wife Lynn KC0YQF on an expedition to activate Mt. Rosa (W0/FR-034) for Summits on the Air. Frank has been on Mt. Rosa a few times and was kind enough to show me the way to the trailhead, off Gold Camp Road west of Colorado Springs.
Okay, if you’ve read many of the posts on this site you know that (a) I’m a ham radio operator, (b) I like to hike and backpack, and (c) often I find ways to combine these two activities. I’m a newcomer to the Summits On the Air (SOTA) game, where you can earn points as a summit activator and/or a summit chaser. Activators are the hams who climb to the top of designated SOTA peaks and make contacts any interested hams, called Chasers. It’s great fun if you’re already a hiker and occasional field operator. Steve WG0AT and Frank K0JQZ first introduced me to SOTA during this springs QRP To the Field event. Frank spotted me on the SOTA Watch website and then handed me the key, where I was immediately piled on by chasers. It was great fun (and captured in video by Steve).
Tonight I played in my first Spartan Sprint in quite some time, and it was a great night for it. I just yesterday finished adding an in-ground mounting hole for my 20-ft telescoping fiberglass pole that I plan to erect temporarily as a support for my Norcal Doublet antenna. My half-size G5RV mounted along the side of the house just wasn’t cutting it, and the wind took it down the other day anyway, so it was time for something new.