After rumors surfaced about the demise of the Elecraft “K1” line, Wayne Burdick (N6KR) made the following announcement on the Elecraft email reflector, specifically mentioning the original K1:
We should have made a formal announcement here. Yes, we discontinued it because certain parts are hard to come by now, making it no longer cost effective for us to manufacture.
It was a great product for us, and I used mine for years, taking it on many trips. I thought of it as a “Sierra on Steroids” at the time (referring to an earlier design I did for the NorCal QRP Club). But we’ve moved on to more versatile field radios, including the KX2 and KX3.
73,
Wayne
N6KR
I’ve owned both the K1 and KX1 and they performed amazingly well. I suppose that’s why I also invested in both the KX3 and KX2 transceivers. I suppose all good things must come to an end.
I still own a K2/100 and I certainly hope Elecraft continues to support this fine transceiver. It’s unique in that it’s about the only American-made transceiver kit on the market that’s easily serviceable by a non-technician. It’s also a rock-solid performer and, frankly, has a cult following of its own.
A compact 10 watts, easy to build, general coverage SSB/CW transceiver for HF bands
Homebrewers have traditionally avoided making multiband transceivers as they can get extremely complex and difficult to make. There have been some remarkable successes in the past, the CDG2000 (designed by Colin Horrabin G3SBI, Dave Roberts G8KBB and George Fare G3OGQ)is one such design. The SDR route as followed by several designs offer some simplification at the cost of bringing digital signal processing and a PC into the signal path.
On the other hand, many of the homebrewers do need a general coverage transceiver on the bench as well as as a base transceiver for bands beyond the HF. I ended up buying an FT-817ND that has been a reliable old warhorse for years. Two years ago, I attempted a high performance, multi-band architecture with the Minima transceiver. The KISS mixer of the Minima, though a very respectable receiver front-end, had serious leakage of the local oscillator that led that design to be abandoned as a full transceiver. Over months, I have realized that the need for a general coverage HF transceiver was wide-spread among the homebrewers. Most of us end up buying one.
While achieving a competition grade performance from a multiband homebrew is a complex task as evidenced by the works like that of HBR2000 by VE7CA, it is not at all difficult to achieve a more modest design goal with far lesser complexity. The uBITX shoots to fulfill such a need. It is a compact, single board design that covers the entire HF range with a few minor trade-offs. This rig has been in regular use on forty and twenty meters for a few months at VU2ESE. It satisfies for regular work, a few trips to the field as well.
A key challenge for multiband transceivers has been to realize a local oscillator system with such wide range. Silicon Labs has now produced a series of well performing oscillators that solve this challenge trivially : You connect the oscillator chip over a pair of I2C lines and it is done. The Si5351a is one such a part that provides 3 programmable oscillator outputs in a small 10 pin TSSOP package. We will exploit this chip to build the multiband transceiver.
Having exclusively used homebrew transceivers all the time, I get very confused whenever I need to use a commercial radio. There are too many switches, modes and knobs to twirl around. The uBITX use an Arduino to simplify the front panel while retaining all the functionality in a simple menu system that works with the tuning knob and a single ‘function’ button. The rig supports two VFOs, RIT, calibration, CW semi break-in, meter indicator, etc. In future, more software can be added to implement keyer, SWR display, etc.
Colin Evans, M1BUU, from near Haworth, West Yorkshire attained SOTA Mountain Goat on Saturday 28th January on the summit of Whernside, G/NP-004.
Colin took rather an unusual approach to his activation of Yorkshire’s highest mountain, by constructing his equipment whilst on the summit.
Colin had taken a QRPme 20m RockMite kit, a home made key kit, a home made vertical antenna kit and a gas powered soldering iron along with him. Sheltering from the wind, rain and snow in a small tent, Colin successfully constructed the RockMite, key and antenna in just under 4 hours.
The first QSO for Colin with his 250mW RockMite was with N1EU near Albany, New York, over 3000 miles away, the three subsequent QSO’s were with European stations, satisfying the SOTA rule requirement of four QSO’s to claim the activation points.
SOTA Mountain Goat is awarded for gaining 1000 SOTA Activator points. For more information, visit www.sota.org.uk
Wow! I may have to purchase one of these and try it out.
I’m currently teaching a HamRadio 101 course to a group of 13 year olds. One of them recently asked how much it would cost to get a basic HF radio kit with SSB mode. HF rigs–even basic ones–tend to be quite expensive if they include SSB.
When was the last time you used a radio you had built? The BITX40 board is single circuit board 40 meter SSB transceiver module. Inside an evening, you can be on-air with this SSB transceiver module, chatting with the local gang or chasing DX. Plug in the earphones, the included electret mic, tuning and volume controls and you are on air! Included are high quality connectors, all the needed sockets and jacks, tuning and volume controls, mounting hardware, etc.
Technicals
The BITX40 is a very clean, crisp and quite receiver. The front-end has a triple tuned circuit that cuts out-of-band signals from getting inside, a diode ring mixer front-end with a very low phase noise, all analog oscillator makes this a crisp receiver that doesn’t overload easily. The all analog signal path to your ear makes provides outstanding signal clarity that is to be heard to be believed.
7 watts of SSB provides you with enough juice to have thousands of contacts on 40 meters, daily rag chew and occasional DX chasing. Any common 2 ampere 12 linear volts supply will provide enough juice for this transceiver. Or you could simply run it from a battery!
Hackable
The BITX40 will inspire you to experiment. Modify it, mount it, tweak it, change it.
The PCB uses all analog large sized SMD components that are laid out on an easy to understand manner on a double sided board with broad tracks. This can be your main module around which you can start experimenting. There are jump-points from where you can add more modules like the DDS, more bands, better audio amplifier, etc. Imagination is your limit. You can separately increase the power amplifier’s supply voltage to 25 volts to be more than 20 watts of power : You will have to add a better heat sink. The mods are on the way!
The board can be installed inside any box that you like. Make your own station rigs, man-packs, trail radios or mount it in a cigar box and leave it on your bedside table. The tuning capacitor has been replaced by a varactor tuning so you can place the tuning knob anywhere as it only carries a DC voltage. Watch the instructions video.
Box Contents
We have tried to include connector/hardware you might possibly need to build a full radio. However, we also had to balance the shipping weight to keep the overall cost down. You will have to supply your own box, power supply and earphones/headphones/speaker.
4-1/2 inches by 5 inches tested SSB transceiver module, covering any 150 KHz segment of the 7 MHz band
Small electret microphone
High quality BNC connector for the antenna
Two earphone style audio jacks for the mic and the earphones/speaker
A set of DC power socket and plug
Volume control with on/off switch
100k linear pot for tuning
4 Brass stand-offs with mounting nuts and bolts
Connectors with wires for all connections on the board
* Note : A speaker is not included in the kit as earphones/headphones/speakers are easily available locally. No cabinet is included to save on the postage cost. Almost any box maybe used.
Manufacture
The BITX boards are hand assembled by a collective of women. Each of the toroids is hand wound. This provides these women with livelihood. The assembled boards are then DC checked a final RF check is performed to check the receiver’s sensitivity as well as transmitter’s output before being shipped. Each board is individually numbered.
I should be on the air starting sometime between 20:00-20:30 UTC (4:00 – 4:30 PM EDT). I’ll plan to operate SSB on two frequencies: 14286 and 7286 kHz. I’ll be on the air for one hour or so, if all goes well. Listen for my amateur radio call sign: K4SWL.
If you hear me on the air, please consider submitting a spot to the DX clusters!
After two months in Canada, I’m pleased to make some time this weekend to activate PK01, the Blue Ridge Parkway.
I’ll be joined by my good friend, Vlado (N3CZ), and we plan to set up at the Folk Art Center on the parkway around 11:00 EDT and be on the air by 11:30 EDT (15:30 UTC).
TROTWOOD, Ohio (WDTN) – The iconic venue brought sports, concerts, entertainment and special interest shows to the Miami Valley for 60 years is closing their doors due to not being able to overcome an internal legal battle that has spanned the last two decades.
“We are painfully aware of the loss this announcement will generate, which is why we have fought so long and hard to prevent it,” says Karen Wampler, Hara’s marketing director.
The loss will come in the form of $36 million in annual economic impact; youth, men’s and professional hockey programs; and the hundreds of events that called Hara home this past year.
“We had hoped to announce a new era at Hara, but are announcing the end of one, instead.” says Wampler. [Continue reading…]
The Dayton Amateur Radio Association (DARA) regrets to inform our many vendors, visitors and stakeholders that, unfortunately, HARA has announced the closing of their facility. We have begun execution of our contingency plan to move Hamvention® 2017 to a new home.
DARA and Hamvention® have enjoyed many successful years working together with HARA Arena and we wish the Wampler family the best.
DARA and Hamvention® have been working on a contingency plan in the event HARA would become unavailable. We have spent many hours over the last few years evaluating possible locations and have found one in the area we believe will be a great new home! Due to logistics and timing issues, we will make a formal announcement introducing our new partner. This information will be coming soon. We all believe this new venue will be a spectacular place to hold our beloved event. Please rest assured we will have the event on the same weekend and, since it will be in the region, the current accommodations and outside events already planned for Hamvention® 2017 should not be affected.
We look forward to your continued support as we move to a new future with The Dayton Hamvention®.
Ron Cramer
General Chairman
Dayton Hamvention 2017
Challenges for a new venue
Two years ago, I spoke with a DARA representative who told me about some of the contingency sites they had in mind should HARA Arena close its doors. Many of us attending the Hamvention had a strong feeling 2016 would be the last year at HARA Arena.
Though HARA was (and has been) in a poor state, the site is very large and has one very unique feature: it’s all on one level.
The outdoor exhibits (flea market) portion of the Hamvention is very popular.
Most of the Dayton area contingency sites were on at least two levels with limited elevator facilities (a potential problem for the hundreds of attendees who use motorized carts).
I also learned that most of the Dayton area contingency sites had another problem: not enough space to have both the inside exhibits and the flea market hosted at the same venue. One contingency plan assumed the flea market might be relocated somewhere else nearby.
I hope the Site B will have the space for both the indoor and outdoor exhibits. Frankly, if these two portions of the Hamvention are separated, I suspect it will have a very negative impact on attendance numbers. Let’s hope this won’t be the case.
In terms of facilities, almost anything else will feel more modern and cleaner than HARA Arena. I just hope it can accommodate 20,000+ attendees as well.
When DARA announces the new site, I will post the information here. Simply follow the tag: Hamvention.
I am loving the new QRP Ranger power pack–it is the solution I decided on after publishing this post a few weeks ago. It’s a little pricey, but it’s built like a tank, very lightweight, includes a charge controller made specifically for the LiFePo cells, and made here in the USA. It also had a very readable LED display that my buddy Eric says is, “reminiscent of the displays on the Apollo 11 module.” He’s kind of right!
It’s so nice to have both a volmeter and ammeter on the front panel.
We just finished activating the Hopewell Culture National Historical Park (I’m writing this post while Eric drives us to our next activation). I made 12 contacts running SSB at 8 watts. Eric made 16 contacts via CW at 5 watts.
We have planned two more activations this afternoon:
Charles Young Buffalo Soldiers National Monument at 16:30 UTC
Dayton Aviation Herital National Historical Park at 21:00 UTC
I’ll be calling CQ on 14.290 MHz and 7.290 MHz +/-.
Please hop on the air listen and/or answer my call if you’re a ham!
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Colin Evans, M1BUU, from near Haworth, West Yorkshire attained SOTA Mountain Goat on Saturday 28th January on the summit of Whernside, G/NP-004.
