AmateurRadio.com

Want to see a KX3 build from start to finish?  TJ, W0EA treated us to live video on USTREAM while he built his:

http://www.ustream.tv/recorded/23127348

If you have a kit on order and have the time, I would really advise watching this (Hint: Start viewing at about the 8:00 minute mark).  Looking at stills (like I’ve posted) is one thing.  Watching the build being done before your very eyes (in real time) is just priceless.

Even though mine is built, I also learned a thing or two.  TJ mentioned that there was a Builder Advisory note that I hadn’t seen anywhere. It concerns the speaker grill and the distortion that can occur if it is installed.  I was experiencing that distortion; so as a result of listening to TJ, I took it out. The unit sounds much better now.

I still haven’t done the roofing filter alignment. maybe tomorrow night as I have been way busy.  But I have found some time to get in a QSO every day for the past few days.  I worked EM2012UA tonight, which is a special event station for the 2012 European Football Championships. Five watts to the Butternut vertical is still getting my signal heard worldwide.

By the way, conditions on 20 Meters were superb tonight.  The noise floor was about S1 and I heard so many European and Caribbean stations up and down the band – it was amazing (especially the fact that it was around 02:30 UTC – recently the band has been dead by then).  The fact that the sun spot number is 154 is a good thing.  Maybe Venus imparted some magic as she crossed the face of the sun yesterday?  Who knows?  If conditions like these keep up for a while, I think we’ll all be happy.

I am becoming more and more familiar with the radio and quite honestly, it isn’t as complicated as I initially thought it would be.  The controls are well labeled and are pretty intuitive and easy to get the hang of.

The bait’s been taken; but the hook hasn’t quite set yet, but this fishy really wants a K3 now.

I’ve been getting a lot of spam comments over the past week or so.  Been averaging about 20 a day since I took the Captcha code thingy off.  I apologize for keeping the comments on moderation; but if I didn’t I’d be overrun by spam.  So if you make a comment and don’t see it for a while, it’s nothing personal – just haven’t gotten to allowing them through.

72 de Larry W2LJ
QRP – When you care to send the very least!

As anticipated, the remainder of the KX3 build did not take long at all.  If truth be told, I am technically not finished – I still have to calibrate the roofing filter. But I am done to the point where I have a working radio.

I left off at the point where I had to install the battery holders and the KXAT3 auto tuner.

That is them installed.  I am not sure if I am going to bother with internal batteries.  The option is available to me if I ever decide to; but that li-on battery I bought is so small and light!  And if I don’t have to open the case – that makes me happy, also.  You can see the auto tuner to the right.  Here’s a close up:

It’s quite a piece of work!  Once I turned the KX3 on, I had to go through the menu and select it so that the radio “knew” it was there.  The tricky thing was that once you turn it “on”, for the first time, you have to turn the radio off and then back on, so that it initializes with it there.  A bit different than selecting options with the K2.

Next came the roofing filter board:

There it is, right behind one of the battery holders. When you install the KXFL3 you have to take out one of the chassis screws.  It is replaced with a much longer one that actually extends through a hole in the KXFL3 circuit board.   This is to prevent the roofing filter circuit board from becoming jostled loose accidentally if the going gets rough on the trail.

Then came connecting the two halves with the ribbon cable, which was a snap.  Connecting the battery holders to their connector and then mating the two halves together and buttoning the radio up.

The first thing to be done was to hook up the battery, cross my fingers and say a small “No smoke, please!” prayer.  When the moment of truth arrived, the display came up and static came out the speaker. No smoke, no disasters, no disappointment.  From there, it was off of the workbench and onto the shack table we go!

I hooked up the DCP paddles and antenna and made a contact on 20 Meters in whatever 4 land QSO party is going on this weekend.  I have it written downstairs; but I think it was K4SAV. Second QSO was on 40 Meters – G5LO in Great Britain.

There’s going to be a learning curve here because this is definitely more complex and sophisticated than my K2.  For now, I just want to make a few QSOs and play around a bit.  I will intensely study the Owner’s Manual and will probably try to calibrate the roofing filter tomorrow.  Right now, it’s back down to the shack to play!

Thanks to all of you who went for this ride with me, beginning last year, when I started saving and selling things to raise the needed funds.  Thanks for sticking with me as I ordered and began the, what seemed to be, interminable waiting period.

Now that the radio is built and seems to be working, I can truly say it was worth the wait and am looking forward to many hours of fun filled QRPing.

72 de Larry W2LJ
QRP – When you care to say the very least!

I have a bunch of chores and chauffeuring to do today.  I probably won’t get around to continuing the build until this evening.  To paraphrase John Lennon’s quote: “Real life is what happens while you’re busy making Ham Radio plans”.

However, here are a couple of thoughts about the progress so far, for those of you who might be inclined to get one of these but are undecided.  This isn’t meant to sway anyone either way – just some observations.

The assembly manual is superb.  No ambiguities at all.  Each step is very clearly outlined.  If you have any questions, they are always readily answered on either the regular Elecraft reflector or the KX3 reflector.  It’s a big community.  Even though the number of kits shipped so far has been less than the number of factory built units shipped, the Elecraft folks and the Field Testers are quick to supply answers.

Elecraft was super quick to answer my query about missing screws and supplied me with a tracking number the next day.

In the opening pages of the manual, the words appear “Even easy for first time kit builders”.  This is true – don’t think that just because you’ve never built a kit before that you can’t undertake this.  I know that the price point can make the effort seem foreboding, but it’s really not. 

Do make sure to do the parts inventory, though.  I am sure the missing screws incident is due to the haste to get product out the door.  As the opening rush subsides, I am sure missing parts will become rare.  I ordered my K1 and my K2 way after the initial release and neither of those kits were missing anything. Indeed, I had excess screws which are proving to be a real life saver now.  But in the meantime, if you have ordered a kit and will be getting it soon – DO THE INVENTORY.

Hopefully, I’ll be posting more photos later tonight.

72 de Larry W2LJ
QRP – When you care to send the very least!

The build continues.  So far I have put about 2 hours into this.  While I’m not quite done, I can see this being done in the 2 hours that Wayne mentioned on the KX3 reflector.  But being uber careful, I am going slow and really taking my time (and also taking time to take photos).  At this point I am “basically“ finished.  I still need to install the battery holders, the auto tuner and the roofing filters.  That won’t take long.  While I am done for the night, I should have this completed and will hopefully make my first QSO (God willing and the creek don’t rise) tomorrow.

This is what the top half looks like from the back. You can click on any of these photos to get a larger image.  The speaker and VFO encoder are towards the top right.

Here’s a close up of the speaker hooked up to the CP board.  Directly below that is the VFO encoder (and shield).

Here’s the finished top half.  If you look at the bottom right hand corner of the plastic bezel you will see where I have a temporary “make do” silver screw holding the bezel down.  This is where I was shorted one screw. I will put a black one in whenever it arrives from Elecraft.

This is the RF board in the bottom housing.  That big black square to the upper left is a magnetic shield.  Things are really crammed onto these circuit boards, I can only imagine the effort it would take to build these boards as a “conventional” kit.

This is the BNC connector. It was a bit tricky to get this in, as with the RF Board in place and screwed down you have to finagle the connector part way into the hole, then get the lock washer and nut in place and started.  Then you have to push the BNC to its final resting place against the chassis wall while simultaneously tightening the lock nut.  There’s just not a lot of space!

Here’s the two final transistors tightened down to the chassis/heat sink area.  This is another area where you have to be careful as Elecraft makes sure to mention (with a big caution) not to disturb that electrolytic capacitor.

So far this has been real easy as kit builds go.  The assembly manual is superbly done. The hardest part so far was installing some nylon screws for the rubber feet.  You want to make sure you get the screws started at exactly the right angle so you don’t end up cross threading or otherwise mucking up the screw threads.

And except for that one silver screw at the bezel, I have been able to make do and keep the build going using those extra screws I had left over from my K1 and K2.  Kudos to Elecraft for basically staying with the same hardware so that my “junk box” screws blend right in.  The hardware that I have coming from Aptos will go to replenish my “extras”.

The bad side of all this ????  This is really making me want a K3 now!  Maybe if I sell off some of my baseball memorabilia collection …………….

72 de Larry W2LJ
QRP – When you care to send the very least!

Not graduation – began working on my American Morse DCP paddles tonight, just as I thought I would.

I spent some time polishing up the aluminum.  First, I gave the metal pieces a light scrubbing with one of those copper Chore Boy scrubby pads.  Then I used some Noxon metal polish (that I forgot I had!) that I found on a shelf. Lastly, a going over with a polishing wheel on my Dremel.

Not a mirror finish, but a lot shinier than they were originally.  All I did was remove the top layer of oxidation. I am sure that with time, the metal will get dull again, but for now, it looks pretty darn nice!

Tomorrow night I will assemble everything – shouldn’t take long at all.

72 de Larry W2LJ
QRP – When you care to send the very least!

I constantly search for new kit sources for the kit roundup list. Today I stumbled on this one:

Kit Radio Company KRC-1

–Kit Radio Company – KRC Kits.  http://kitradio.co.uk/page2.htm This UK-based company produces several interesting kits including receivers,

transmitters, and accessories.  All prices are in British Pounds.

• KRC-1 superhet receiver.  This receiver covers MW, and SW (160 thru 40 meters).  Built in a 5-stage process for education.  1) Medium wave TRF receiver driving an earphone. 2) Audio amplifier providing speaker output. 3) The TRF receiver is converted to an IF amplifier 4) Mixer/oscillator converting the receiver to a four band superhet. 5) BFO to enable CW/SSB to be resolved.  £65.99 plus S&H
• KRC-2 regenerative receiver.  Covers 1-30 Mhz. in 3 bands.  Regeneration with a difference.  The regeneration setting on the KRC-2 is unaffected by the receiver tuning or the antenna coupling. How is this achieved?  The regenerative stage is fixed at 10.7MHz and used as an IF amplifier.  This one reminds me of the Radio Shack Globe Patrol regenerative I built as a kid.  £54.99 plus S&H
• KRC-4 beginners TRF receiver.  2 bands; 800KHZ to 1.6MHZ and 4.0 to 8.0MHz.  A TRF receiver designed for the beginner. Using a reflex circuit this receiver employs only one transistor. Band selection is achieved with two plug in coils, these are pre-wound and both coils come as part of the kit.  £24.99 plus S&H
• KRC-5 direct-conversion 80 meter receiver. Designed around two well proven chips the SA602 and LM386. Employing a VFO that can be calibrated to fulfill your  requirements.  £25.99 plus S&H
• KRC-X-1 QRP transmitter.  Covers 7, 10 and 14MHz.  All you do is plug in a different crystal assembly to change band and re-tune the antenna.  0.5 to 2 watts output.  £69.99 plus S&H
• KRC-X-2 80/160 meter transmitter.  A simple cost effective transmitter covering either the 80 or 160 meter bands. It provides 2 Watts of RF power when operating from a 12 Volt supply. With a peak output rising to 8 Watts if external modulation is applied.  Please specify 160 or 80 meters when ordering.  £33.99 plus S&H
  

  Kit Radio Company KRC-X-2

I really envy all of you fortunate enough to attend the Dayton Hamvention and FDIM.  Looks like a bounty of good QRP stuff will be available.  Doug Hendricks KI6DS, posted this to QRP-L today:

Hendricks QRP kits will be at Dayton again this year, and we will be in a new location. Our booth numbers are 459 and 460, located right across from the ARRL in the Ball Arena. And we have 9 new products, yes, you read it right, 9. Here they are:

1. The Weber Tribander designed by Steve Weber, KD1JV. This is a 3 band CW Transceiver and you get to pick your bands from the following: 15, 17, 20, 30, 40 and 80 Meters. Digital display, Custom Case, DDS Vfo, and Encoder Tuning. If you have wanted a PFR on other bands or with rotary encoder tuning, this is the radio for you. Price: $200.

 2. The Tuthill 160 designed by Dan Tayloe. Finally, a cw transceiver kit for 160M. We have expanded the popular Tuthill series to now include 160M with a full 5 Watts of output. Basic Kit is $100 (show special), optional Digital Display, $35. Now is the time to get this kit so you will be ready for 160 in the fall.

3. SMK-2. The popular surface mount 40M CW transceiver designed by Dave Fifield is back. And it is improved! The SMK-2 comes with 2 Frequencies, and is complete with case and connectors. Plus there is an optional Crystal Board available for switchable frequencies. The Transceiver is $40, Optional Crystal Board is $10. Frequencies are 7.030, 7.040 and 7.122MHz.

4. 41dB Step Attenuator. We have kitted the popular design that has been in the ARRL handbook for years. Ken Locasale designed a great looking case, and everything is included. Great for working low power and for transmitter hunts. $50.

5. Rock Hunter Chassis for the DCxxB series. We now have a case, connectors and an addon board to give 2 additional frequencies for the DCxxB series of transceivers. We have had many, many requests for a case for the DCxx series of transceivers, and now we have it. $20 for the case, connectors, controls and addon frequency board.

 6. Red Hot 40 Transceiver. We will have a special price on the Red Hot 40, the high performance 40 Meter CW Transceiver designed by Dave Fifield. The show special is $200, which is $50 off the regular price.

 7. Repackaged Tayloe SWR Meter. Ken has come up with a great little chassis for the SWR Meter designed by Dan Tayloe, N7VE. $25.

8. Sota Tuner. This has been one of our best sellers since we introduced it in September. The Sota is an End Fed Half Wave Tuner with a metal case, stainless steel hardware, and only weighs 2.5 ounces, and the price is $30.

9. Two Fer Transmitter. The Twofer is a great little transmitter. Available on 40 or 30 or 20 Meters. Show special at $30.

We will also have show specials on the Tenna Dipper, with a price of $70, MMR40 at $175, NADC40 basic kit w/out digital display, $100, Ft. Tuthill 15, basic kit no display, $100.

Stop by the booth and say hello to Steve Weber, KD1JV who will be in the booth on Friday and Saturday, plus Dean Davis, Darrel Swenson, Ken and Karen Locasale.

Plus, we will be able to take credit cards this year for the first time. We accept Visa, Mastercharge, Discover and American Express. I am kitting like crazy and really excited about this year at Dayton. Hope to see you there. Doug

Sounds like it’s a good idea to bring lots of radio money along.  Maybe it’s a good thing that I’m not going? At least that’s what the XYL is probably thinking.

72 de Larry W2LJ
QRP – When you care to send the very least!