Many thanks to Keith (GW4OKT) who recently contacted me, noting that his took his Elecraft K1 to Llyn Brenig (Lake Brenig) in North Wales last weekend, and was impressed with its performance.
His outing coincided with the CQ Worldwide CW contest–a true test of any radio as this is one of the most RF-dense environments you’ll encounter on the CW portions of the HF bands.
Many lesser radios simply fall apart in contest environments like the CQWW.
Not the Elecraft K1, though! Keith noted that he was operating on 20 meters with his GWhip antenna on the roof of his car.
He made the following video:
Wow! I owned the K1 for a number of years and was incredibly impressed with its receiver although I can’t remember if I ever used it in a contest. It’s a brilliant field radio and sports a bullet-proof front end.
I should add, Keith, that I’m not the least bit envious of your Caterham Seven 310 SV. Not a bit. Not me. 🙂
Anyone else love the Elecraft K1 (or the Caterham Seven 310?) Please comment!
A number of readers have asked about the small foot under my IC-705 in recent POTA field reports.
One of my biggest criticisms of the IC-705 is that it has no built-in foot to tilt the radio for an optimal operating position. On the other hand, it does have a number of attachment points on the bottom including a standard tripod mounting point and several 4mm points.
Shortly after I received my IC-705, I checked Thingiverse knowing a clever ham would have designed some sort of leg or tilt stand.
It prints quickly and uses very little material (no support structure). Mine is made of orange PLA (because that’s what my daughters had been using), but I’m sure ABS would be a better choice.
You’ll need two M4 x 10mm screws to attach the foot to the bottom of the IC-705; mine have hex socket caps.
I’ve found that the foot is small enough that I never need to detach it even in transport.
Many thanks to Curt (WU3U) who recently contacted me and mentioned he had built an IC-705 control interface for his Elecraft T1 ATU. This is a homebrew project based on others’ work and uses the FT-817 control port on the side of the T1 tuner.
I asked Curt if he could share a little more about his tuner to post here on QRPer:
Hi Thomas, I can’t take credit for the interface, as a guy in Japan designed it. When I built mine the entire instructions and notes for code for the PIC controller were in Japanese. I used Google translate to translate all of the information and I was able to successfully program the PIC chip and build the circuit. He has since released the details and code in English.
There are two designs: one with an on/off switch, and a newer version without an on/off switch that has auto power save. Both circuits are the same but the software for the PIC chip is different. If you build the one without the on/off switch there is a very specific sequence of connecting and disconnecting the device and it’s my opinion that the one with the on/off switch is the version that makes more sense to build. It shouldn’t matter which order you connect everything up and you simply throw the on/off switch to turn the device on and off.
Building the interface takes an understanding of a fairly simple electronic schematic and acquiring the parts. You also have to have a PIC programmer and the software to write his .hex file into the PIC controller chip.
The parts for the interface are all very common parts. The resistors are standard values. My build cost me about $30 in parts but I had to buy many of them in bulk from Amazon like the enclosures, switches and 3.5mm jacks and circuit boards to name a few. Individually the parts were $30 but my bulk order cost me much more. I also had to buy a PIC programmer for $25 and figure out what software I needed to download to program the PIC chip with the author’s code. It takes an experienced builder about two hours to build the device but it’s not out of the realm of a semi-novice as long as they can get the PIC chip programmed.
Here is his newer version with the same circuit design eliminating the on/off switch by using a different PIC program allowing the interface to have auto power shutdown (low power standby) but there is a specific order for connecting and disconnecting the interface. With this version there is still drain on the battery but the designer thinks that drain is less than the normal self discharge of the battery. I feel that any discharge combined with the self discharge of the battery will be more discharge than using the design with the on/off switch. https://amateur-radio.cocolog-nifty.com/blog/2020/11/post-591d17.html
Video
I think this is a brilliant project and certainly one worth considering for those of us who already own an Elecraft T1 ATU and would like full control from the IC-705.
MFJ Enterprises has an amazingly deep catalog of products. So deep, I often overlook items that could be quite useful in the field.
MFJ recently sent me one of their travel paddle kits to evaluate on QRPer.com–no doubt, they heard my plea for paddle recommendations some time ago.
Paddles are a funny thing: they’re basically a very simple switch, so not terribly difficult to homebrew. Yet sometimes we want to simply purchase pre-made paddles instead of building them.
I don’t personally want to invest crazy money in field paddles because there’s a reasonable chance they could get damaged in my pack or I could even leave them on the forest floor after a POTA/SOTA activation.
Plus, paddles aren’t the weak link in my CW game (ahem, yeah…you might have guessed it’s the operator–!).
The price of MFJ-561K paddles hits a sweet spot at $25 US. I know of no other paddles made in the US that are cheaper (although I know I might stand corrected on this point).
For $25, you’re not getting Begali quality: you’re getting something that’s simple and gets the job done.
The MJF-561K is actually a simple kit that you assemble at home. It’s a novice build for sure, taking (generously) 20 minutes to assemble and requiring no kit building experience. You will need to use a soldering iron to attach the three conductor wire to your paddles–otherwise, it feels more like a mini Meccano or Erector set.
At one point early in the build, I did find myself looking for a detailed photo to determine how the shoulder washers were placed. I couldn’t find one, so I decided to take my own photos to help anyone else building these paddles in the future.
MJF-561K Assembly Photos
Click on the photos below to enlarge:
The shoulder washer fits in the hole on the inside of the paddle as you can see on the upper paddle lever. The larger washer goes on the outside of the paddle, insulating the solder lug and Kep nuts.
One bolt and Kep nut holds the back of the paddles to the base.
This image shows how the center contact is screwed in. Note that another solder lug is held in place under the paddles and is not in this photo, but shown in the photo below.Once you’ve attached the bottom solder lug and Kep nut, position the center contact (on top) so that it floats between both paddle contacts before tightening down.Next, you’ll need to strip the supplied three conductor cable, tin the ends, and solder them to the three solder lugs. Check your radio manual to determine which side of the paddle to solder the tip and ring wires based on which side of the paddles will send dits and dahs.
Hint: when attaching the cable tie/strain relief, position the cable tie locking point so that it faces up rather than down (to avoid that part of the cable tie interfering with rubber feet contact.Next, attach the rubber feet to the base.And, finally, attach the rubber pads to the paddles
On the air
The building process was super simple as you can see from the photos above. I didn’t test the paddles in advance to make sure the shoulder washers were insulating the contacts properly, nor did I test that my ring/tip placement was correct before soldering. I would suggest you do this!
Fortunately, I plugged it into the Yaesu FT-817ND and it worked perfectly!
The paddles are lightweight and the action reminds me very much of Whiterook Paddles.
Any criticisms? For the price, these are brilliant. With that said, I wish the three conductor wire was just a bit heavier gauge. The conductors are very thin and I do worry how well they’ll hold with heavy use. Of course, it’s an easy process to replace this cable with one of my own. Also, like most lightweight backpack paddles, the thin metal sheet base needs to be held in place while operating.
I think I might attach the paddles directly to a clipboard. If I drill two holes in the paddle base, I could mount them with small bolts onto the clipboard and remove them when done. I’ll give this some thought.
For $25, the MJF-561K paddles are a no-brainer. I see keeping a set of these for ultralight operating and perhaps even as a set of backup paddles. And, hey! They’re a great stocking stuffer idea. I would suggest MFJ consider making a single-lever version as well.
In a previous post, I mentioned that I had regretted selling quite a few radios.
Almost immediately after publishing that post, I purchased an Elecraft KX1. It was an impulse purchase, and I’m happy I made it.
Then, a couple weeks ago, my buddy Don discovered I was considering purchasing the Yaesu FT-818.
He mentioned that he had a very lightly used FT-817ND with a lot of extras he would appreciate selling me. I agreed without hesitation.
The package included:
Yaesu FT-817ND
Inrad SSB 2.0 kHz narrow filter
Massoft Mylar speaker (installed)
Anderson Powerpole adapter on rear of chassis
Yaesu PA – 48B Charger
Portable Zero FT-817 ESCORT bracket and side rails in black
Portable Zero Sherpa Backpack
Nifty Mini Manual
Yaesu FNB 85 1400ma
All original accessories and antennas
Don offered a fair price for the package, so how could I resist? (Hint: Don’t answer that!)
Besides completely trusting Don as a seller, I must admit that the FT-817 Escort side rails were a big selling point. I’d planned to purchase those regardless. Having owned the original FT-817–what, 20 years ago?–I knew I wanted something to protect this radio in the field. Not only that, but the FT-817 needs a proper bail in my opinion and the Escort delivers!
Blue Ridge National Parkway (K-3378)
Saturday, I had one goal in mind: split some firewood at my father-in-law’s house. But I had to pass the Blue Ridge Parkway (K-3378) en route, so why not a quick activation too, right–?
Packed the FT-817ND and, since I needed to fit in a quick deployment, the CHA MPAS Lite antenna.
Talk about getting reacquainted with an old friend: I haven’t operated an FT-817 in at least 18 years!
I was on the air perhaps 35 minutes or so. It was a lot of fun and some trial by fire as I quickly sorted out my CW and phone settings live on the air.
I very quickly made contact with my buddy Eric (WD8RIF) in a park to park contact (thanks, Eric!).
After that, a CW contest started up and I quickly realized how important it will be for me to get a narrow CW filter for the FT-817ND. It was as if 10 stations were sharing the frequency with me. (Any advice on filters would be much appreciated!)
I only managed to collected the 10 contacts needed for a valid activation and, for the first time, relied on my daughters (both licensed) to help snag my 10.
Propagation was poor on Saturday. Since I was in a hurry to get the wood split–and was running behind–I didn’t hang around to work more than 10 stations. Plus, no one “needs” the Blue Ridge Parkway these days since it’s activated so frequently.
This activation was a brilliant shake-out for the FT-817ND field kit. I created a few to-do items:
Perform some TX audio tests and tweak the mic settings at home–I feel like the mic gain might have been a bit low.
Sort out the AGC and sidetone settings in CW and decide if I want to run full or semi break-in. Between the relay clicks, AGC recovery and gain settings, I found full break-in a little distracting with the lower sidetone volume I had set Saturday. This can be easily adjusted and then it’ll sound great.
Dedicate a small external battery pack for the FT-817ND kit. I might purchase another 6aH Bioenno pack especially since it fits in the Sherpa pack side pocket so well.
I have the accompanying internal battery pack, but have yet determined how much capacity it still has.
I’m so happy the ‘817ND has re-joined my field radio family! I’ve missed this fine little rig!
I woke up Saturday morning (October 24, 2020) with one goal in mind for that day: activate Toxaway State Game Land (K-6960).
This year, I’ve had a blast finding game lands to activate for the Parks On The Air (POTA) program as they are typically are less crowded, have open areas to hang long antennas, and sometimes even give me a chance to do a little off-roading.
I’ve had Toxaway on my list of game lands to activate since April, but it’s a good 1.5 hour drive from the QTH and not in a part of the state I routinely drive through these days. After some searching, via the excellent WRC interactive map, I was able to find one access point that even appeared to have parking for a trail head.
I checked with the family and they were all up for a drive and picnic lunch.
It’s still “leaf-looking” season here in the mountains of western North Carolina, so the roads were pretty crowded with tourists. The closer we got to this relatively remote site, though, the less traffic. A very good sign!
Chameleon Antennas recently sent me their new CHA MPAS Lite vertical to evaluate and I had planned on deploying it for this activation, but once I arrived on site, I realized I should have checked a topo map first: it was deep in a valley near a creek and I questioned the wisdom of using a short vertical in this situation. That and propagation wasn’t exactly stellar.
Fortunately, there were tall trees around, so I deployed the CHA Emcomm III Portable random wire antenna which has become one of my favorite field antennas.
Saturday was also the CQ WW SSB contest, so the phone portions of the bands were very busy with contest activity. I planned to make this primarily a CW activation.
After setting up the Icom IC-705, I attached my Elecraft T1 ATU to the rig and antenna. Since this turned out to be a parking area activation, I could have set up my portable table, but instead, I used the Red Oxx C-Ruck pack to support the IC-705 and ATU.
Using the C-Ruck as a mini field table saves time. I discovered how useful this pack was while evaluating the lab599 Discovery TX-500 in August.
I started calling CQ POTA on 40 meters and within seconds the the POTA site auto-spotted me via the Reverse Beacon Network (RBN). I only called CQ POTA twice before I started working pile-ups.
The Emcomm III Portable antenna performed admirably as I pushed a full 10 watts of power.
Indeed, for me, this activation was a bit of a sprint to answer everyone calling me in the amount of time I had at the site. To make the activation work in our Saturday schedule, I only allowed for one hour on the air.
QSO Map and logs:
Map courtesy of QSOMap.org Green=CW Red=Phone (Click to enlarge)
Not at all bad for 10 watts and a wire!
I could have worked many more stations had I moved to 20 meters CW and then back to 40 meters CW, but I did want to make a few SSB QSOs and even attempt hunting other POTA parks.
Some highlights: working my buddies (and fellow SEORAT members) Eric (WD8RIF) in park-to-park contacts, and Mike (K8RAT) who is one of the top hunters in POTA and also huge support to Eric and me in the field.
I was also very pleased to work another local park activator, Steve (KC5F), who is an excellent CW op–indeed, I believe this was our first SSB contact! Steve primarily operates CW with his Xiegu G90. We typically struggle working each other because we’re simply too close geographically!
All in all, it was amazing fun!
Once again, I was impressed with the IC-705’s capabilities, the T1’s excellent matching skills, and the Emcomm III portable’s performance.
I also find the CW Morse Pocket Paddle to be a brilliant portable paddle. It’s slightly larger than my N0SA paddles, but still very portable. I’ve been carrying them in the top flap of my ruck sack.
I will plan to return to Toxaway, perhaps this winter, and spend more time at the site.
The seller, who lives about 2 hours from my QTH, described his KX1 as the full package: a complete 3 band (40/30/20M) KX1 with all of the items needed to get on the air (save batteries) in a Pelican 1060 Micro Case.
The KX1 I owned in the past was a four bander (80/40/30/20M) and I already double checked to make sure Elecraft still had a few of their 80/30 module kits available (they do!). I do operate 80M in the field on occasion, but I really wanted the 80/30 module to get full use of the expanded HF receiver range which allows me to zero-beat broadcast stations and do a little SWLing while in the field.
The seller shipped the radio that same afternoon and I purchased it for $300 (plus shipping) based purely on his good word.
The KX1 package
I’ll admit, I was a bit nervous: I hadn’t asked all of the typical questions about dents/dings, if it smelled of cigarette smoke, and hadn’t even asked for photos. I just had a feeling it would all be good (but please, never follow my example here–I was drunk with excitement).
Here’s the photo I took after removing the Pelican case from the shipping box and opening it for the first time:
My jaw dropped.
The seller was right: everything I needed (and more!) was in the Pelican case with the KX1. Not only that, everything was labeled. An indication that the previous owner took pride in this little radio.
I don’t think the seller actually put this kit together. He bought it this way two years ago and I don’t think he ever even put it on the air based on his note to me. He sold the KX1 because he wasn’t using it.
I don’t know who the original owner was, but they did a fabulous job not only putting this field kit together, but also soldering/building the KX1. I hope the original owner reads this article sometime and steps forward.
You might note in the photo that there’s even a quick reference sheet, Morse Code reference sheet and QRP calling frequencies list attached to the Pelican’s lid inside. How clever!
I plan to replace the Morse Code sheet with a list of POTA and SOTA park/summit references and re-print the QRP calling frequencies sheet. But other than that, I’m leaving it all as-is. This might be the only time I’ve ever purchased a “package” transceiver and not modified it in some significant way.
Speaking of modifying: that 80/30 meter module? Glad I didn’t purchase one.
After putting the KX1 on a dummy load, I checked each band for output power. Band changes are made on the KX1 by pressing the “Band” button which cycles through the bands one-way. It started on 40 meters, then on to 30 meters, and 20 meters. All tested fine. Then I pressed the band button to return to 40 meters and the KX1 dived down to the 80 meter band!
Turns out, this is a four band KX1! Woo hoo! That saved me from having to purchase the $90 30/80M kit (although admittedly, I was looking forward to building it).
Photos
The only issue with the KX1 was that its paddles would only send “dit dah” from either side. I was able to fix this, though, by disassembling the paddles and fixing a short.
Although I’m currently in the process of testing the Icom IC-705, I’ve taken the KX1 along on a number of my park adventures and switched it out during band changes.
Indeed, my first two contacts were made using some nearly-depleted AA rechargeables on 30 meters: I worked a station in Iowa and one in Kansas with perhaps 1.5 watts of output power.
I’m super pleased to have the KX1 back in my field radio arsenal.
I name radios I plan to keep for the long-haul, so I dubbed this little KX1 “Ruby” after one of my favorite actresses, Barbara Stanwyck.
Look for Ruby and me on the air at a park or summit near you!
On Monday (October 19, 2020) I received an inquiry from Dale (KI5ARH) only an hour or so before packing up my radio gear to activate Lake Norman State Park (K-2740).
Dale is interested in using his recently acquired Icom IC-705 to get involved with Parks On The Air (POTA) and play radio in the field.
What’s in my field kit
Dale was curious about all of the components of the field kit I use with the IC-705, so I made this video:
Since I had already set up my phone to record the video above, I decided to make a couple more.
I thought there might be some value in making real-time videos showing what it’s like operating CW and SSB during a POTA activation. The videos have no edits and haven’t been trimmed. It’s as if the viewer were there at the activation sitting next to me at the picnic table.
Operating CW with the IC-705
After setting up my station, I first started on the 40M band in CW. I meant to start the camera rolling during tune-up, but forgot to hit record. The video begins after I’d made a few CW contacts, but shows what it’s like changing bands and relying on the Reverse Beacon Network (RBN) to pick me up then the POTA website to auto spot me.
Note: to be automatically spotted by the RBN, you must schedule your activation via the POTA website in advance, or have been already spotted by yourself or someone else, so the system will know to look for you.
My video cut off abruptly due to a low battery message. I had to give my iPhone a quick power charge to make the next video.
Operating SSB with the IC-705
After operating CW for a while, I plugged in the hand mic that ships with the IC-705 for a little SSB action. My main goal with this video was to show how I call CQ and use the voice keyer memories in order to manage the field “work flow” process. I also speak to how important it is to either self-spot or have a friend spot you to the POTA network while operating phone.
I spent so much time setting up and running the camera, I wasn’t actually on the air for very long, but I easily managed to achieve a valid activation and had a lot of fun in the process.
I’m not a pro “YouTuber” as I say in one of my videos. I much prefer blogging my experiences rather than “vlogging,” I suppose.
Still, I think I’ll do a few more “real-time” videos of POTA activations and speak to the various techniques I use to activate parks. Since these videos aren’t edited for time, they may not appeal to the seasoned POTA activator or QRPer–that’s okay, though. My goal is primarily to assist first-time POTA activators.
Have you been activating Parks or Summits lately? Do you have any advice or suggestions I failed to mention? Or do you have suggestions for future topics? Please comment!
On Wednesday, October, 14 2020, the weather was gorgeous so I decided to make an impromptu POTA activation of Pisgah National Forest and the Pisgah Game Land (K-4510 and K-6937). These sites are the closest to my QTH and only a 15 minute drive (in fact, I can even hike up to the same trail network from my back yard).
My canine companion, Hazel, jumped into the car before I could even invite her to come along.
We drove to the trailhead, parked, and hiked a short distance into one of my favorite spots where it’s relatively flat, with lots of tall trees and almost no foot traffic from other hikers.
This activation gave me an opportunity to use the Icom IC-705 in more of a “backpack” setting since I hiked in with only my pack, Hazel, and my folding three-leg stool. Up to this point, I’d only used the IC-705 on picnic tables and flat surfaces since it can’t easily fit on my clip board like my MTR-3B, KX2, and KX1 can.
The activation also gave me a chance to evaluate a new product sent to me by the CW Morse company: their “Pocket Paddle” designed specifically for portable operations.
I decided to set up the Icom IC-705 much like I did the lab599 Discover TX-500 when I took it on hikes: mount the radio above the front pocket of my Red Oxx C-Ruck backpack.
The arrangement works quite well–I simply sit on the stool in front of the pack and hold my simple logging notepad and paddles on a clipboard.
While this particular site is great because it’s so accessible to me, the negative is it’s deep down in a valley surrounded by high ridge lines. I feel like this does have some impact on how well my signal travels.
Wednesday, it took nearly 50 minutes to rack up a total of 12 contacts in CW mode. I never bothered with SSB/phone because this site had no cell phone service and, thus, there was no way to spot myself on the POTA network.
That’s okay, I felt pretty chuffed about racking up 12 contacts with 5 watts and a wire! This is what field radio is all about, in my opinion.
After a little falling out with the mAT-705, I decided I wanted to try other ATUs with the IC-705. I used to own an Elecraft T1 ATU and loved it, but I eventually sold it for a song to a friend since all of my field rigs at that point had internal ATUs.
I reached out to Elecraft and they sent me a T1 on loan to give it a go. I’d forgotten how much I love this simple, effective ATU.
Even though the EFT-MTR is resonant on 40, 30, and 20 meters, moving to the 30 meter band requires lowering the antenna, pulling off an SMA cap on the coil, then re-hanging it. Not a big deal at all, really, but it’s so much easier to simply press the tune button on the T1 and have it match 30 meters without going through the normal process.
CW Morse Pocket Paddle
I also thoroughly enjoyed using the CW Morse “Pocket Paddles.” I’m not sure when they’ll be available to purchase (perhaps they are already?) but I can highly recommend them.
The paddle action is field-adjustable and even though there’s an Allen wrench built into the paddle base, the machined screws are easy to twist by hand.
They feel very sturdy, too, much like the other CW Morse paddles and keys I’ve used.
I believe the Pocket Paddles are going to permanently pack with my IC-705!
While visiting my parents this week in the Piedmont of North Carolina, I took some time Monday afternoon to take the new Icom IC-705 to field and activate Lake Norman State Park (K-2740) for the Parks On The Air (POTA) program.
So far, most of my time with the IC-705 has been in CW mode but a number of my readers have been asking about SSB operation and performance.
My goal for this park activation was to give the IC-705 a proper shake-out on SSB.
Set-up
The activation was very much impromptu–I only decided I could fit it into my day an hour before my start time. In addition, while it wasn’t raining per se, there was a very heavy mist/fog that, at times, felt like a light sprinkle/drizzle.
I packed and planned on using my IC-705, mAT-705 external ATU, and Vibroplex End-Fedz EFT-MTR wire antenna.
I had an issue with the mAT-705 ATU (read more here), so opted for my trusty and incredibly capable Emtech ZM-2.
I did begin the activation in CW and quickly racked up a dozen or more contacts in short order after spotting myself. One of the great things about Lake Norman State Park is it’s one of the few locations I activate these days with proper cell phone coverage for mobile internet so that I can update my own activation spots on the POTA site.
I also moved up to 20 meters and switched over to my recently (re)acquired Elecraft KX1 (FYI, I named her “Ruby” so no way will I sell her again).
I quickly snagged two states (Iowa and Kansas) with 1 watt of power from the KX1’s internal AA cells, then 20 meters fell silent, so I moved to 30 meters to work a few more stations.
SSB on 40 meters
I then moved to the 40 meter band and decided to record a quick video after spotting myself on 7197 kHz. I wasn’t expecting such a productive mini pile-up.
As you can tell from the video, I had my hands full trying to hold my phone/camera, log, and manage the hand mic. Note, too, I prefer not hooking up the speaker portion of the microphone because audio from the IC-705 internal speaker is far superior:
I operated SSB for a good 30 or so minutes and was busy with contacts thanks to all of those excellent POTA hunters.
IC-705 Voice Memory Keyer
Before packing up, I remembered that my buddy Dave had asked me to make a video showing how I use the IC-705’s voice memory keyer, so I moved up to 20 meters (which you’ll see was pretty much dead) and recorded this.
Doh! I had the SSB position in LSB instead of USB! Thanks to one of my YouTube viewers who noticed this. I had been tinkering with mode settings earlier while evaluating the rig. No worries, though, this was more a demo of the memory keyer–check out SSB operation in the video above.
I was actually very relieved 20 meters was dead because I’m terrible at managing a camera, a tablet, and a microphone all at once!
The Icom IC-705 is an SSB champ
Photo taken at South Mountain Game Land last week.
Despite the fact that I was using the default microphone settings and had not even touched the TX EQ or compression, I received no less than three unsolicited compliments about my audio during this activation. That is probably a personal record.
No doubt, the IC-705 is a very capable rig for QRP SSB where audio quality is essential.
On top of that, the eight voice keyer memories are incredibly useful when activating a park, a summit, or even running a contest where you could truly automate your exchanges.
Have you been using the IC-705 in the field? What are your thoughts? Do you have any questions? Please feel free to comment!
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Many thanks to Keith (GW4OKT) who recently contacted me, noting that his took his Elecraft K1 to Llyn Brenig (Lake Brenig) in North Wales last weekend, and was impressed with its performance.
Anyone else love the Elecraft K1 (or the Caterham Seven 310?) Please comment!
There are two designs: one with an on/off switch, and a newer version without an on/off switch that has auto power save. Both circuits are the same but the software for the PIC chip is different. If you build the one without the on/off switch there is a very specific sequence of connecting and disconnecting the device and it’s my opinion that the one with the on/off switch is the version that makes more sense to build. It shouldn’t matter which order you connect everything up and you simply throw the on/off switch to turn the device on and off.
