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Well the KX3 is almost completed and this is the 3rd of a 4 part assembly video of the radio. In this YouTube video I go over the problems I had with the ATU installation, the roofing filter board issue and the battery holder oops I had and needed to correct before there was damage. The build is almost complete but have a look and either get excited about purchasing one or pick up some pointers before you do  your build.

Part two of the KX3 build is up on YouTube, in this video I go over some of the troubles I encountered and how they were solved. The radio begins to take shape and looks more and more like a KX3.

Someone is going to be busy this weekend with a kit!!

Charger ready for testing

I have built  A&A Engineering's 1 amp Smart Battery QRP charger mainly for my Elecraft K2's internal battery. This very much is a smart charger and here are a FEW reasons why.....

1. The charger can be connected to the battery indefinitely and no harm will come to the battery. Once the battery is fully charged the Smart charger will remain in maintenance mode delivering a float charge. Therefore the battery cannot be over charged.

2. The charger can stay hooked up to the battery while operating the radio if you so choose to do so. The charger will enter the bulk mode to help with the load of the radio operating.

3. When the charger is connected it automatically determines the type of charge the battery needs.

Close to done but no heat shrink on LED

 The charger can either be ordered fully assembled and tested or as a kit.....yours truly held true and strong the the QRP spirit and chose the kit. The kit did arrive very fast and all parts were checked and accounted for. If you are a first time builder of  kits this may not be the one for you as the instructions are vague at times. I did get myself into problems after  realizing I had missed part of the assembly and had to go back to add parts and two jumpers. The kit does not give you the "standard" step by step instructions regarding assembly. It's more or less tells you too "install the components according the the pictorial diagram".  There are even little side notes here and there one in particular relating to jumper installation that I totally missed. I did get the charger all together and it was time to check the unit out. So I plugged the charger in, turned it on and ........no 12 volts DC from the leads on the charger!!!!

Top view with no jumpers or D1 ops

Fried resistor

 It was time to check the board to see if parts were installed according to plans and if all solder joints were good and soldered. All seemed to be good so it was off to the internet to see if anyone had the same troubles. It was on the internet I found a test procedure for the kit version of the  charger from A&A Engineering. For some reason beyond me I am not sure why this was not included in the kit!!! Anyway.....one of the things what was emphasized was if the charger is not hooked up to a load you will NOT get any output. Well that solved the problem of no output and things now seemed to be "normal" There was a test procedure in the text that

Decided to use Anderson conn's

allowed you to see if parts of the charger were working as they should. It involved removing the IC and shorting legs of the IC 16 pin socket to certain areas of the circuit board. When this was done certain voltage reading should be observed or LED's should turn on. Here is my BIG problem with this type of testing......when you short things out things can go WRONG and they DID!!! I guess I was not paying close attention and I shorted the wrong pin on the IC to ground and I FRIED a resistor on the board. When you short out to test I call this a destructive way of testing I much more prefer using a meter to look for certain voltages. If  you either don't get the right voltage or a down right outrageous voltage you understand
either:
1. You are in measuring in the wrong place.
2. You have made a mistake in the assembly.
In either case nothing has been toasted

Some heat shrink fun

In the end all checked out ok with the Smart charger and it working great to charge my Elecraft K2.  Over all this is a great unit even with the hiccups that I had. Some of the things that are not clear in the instructions are as follows
1. The heat shrink tubing is very clearly stated to go on the transistor but it also should go on the leads of the LED's...that was not so clear and I have redo the LED's.
2. Make sure you add the jumper J1 to J2 in my case it is mentioned but off to the side of the instructions
3. There is no diode to be installed in D3 position, instructions just say install parts and there are is D1, D2 and D3. Just install the diodes (both are the same diode) one in D1 the other D2.

D1 needs to have the diode not D3

4. If  you ordered the QRP version of the charger as I did you will get a separate kit that allows the charger to switch between two charging currents. Read those instructions and install the resistors they tell you too or you will end up removing resistors if you follow the main instructions then move to the add on kit instructions as I did.
5. When done remember the output leads will SHOW NO VOLTAGE UNLESS A LOAD IS APPLIED.
6. The document required to test the unit can be found at the link above under "test procedure". BUT when  you do it be very careful!!!

Missing fingers on SD card

This weekend I took part in the ARCI  Welcome to QRP contest it's only a 3 hour contest from 11:00 am to 2:00pm (local time). I decided to take this contest to the park as it sure does help with the bonus points that are offered for going portable. I took my camera along to snap some shots. Most of us who blog do have a camera of some kind to add the flavor of pictures to the blog post. My camera is a Nikon D60 and has been giving me some trouble,  now then it would not recognize the SD memory card and failed to take a picture.
Just like a sore tooth that gets better just before the dentist visit....the camera would work just fine at the camera store. Today the camera worked great and when I go home I wanted to email a contacts I had that turned into a very nice QSO.

Seam problem

Seemed the SD card knew I was in a hurry and wanted  pictures to add to an email. The computer told me it could not recognize the memory card. The card was then put back in the Nikon D60 but now it too would not recognize the card either. GREAT here we go again I thought but after close examination I found the card to have some damaged fingers at the far right!!! I went on the internet and downloaded some programs that claimed they could recover pictures from damaged SD cards. I didn't have any luck with these programs other than them taking up space on my hard drive. I still was getting a

The fix until all was downloaded

message to place the SD card into the reader so photos could be recovered. Well the card was in the reader and it was not looking good at all. I then had a closer look at the card there was not only fingers missing but the card was separating at it's seam. I tried  taping the seam as the card may be separating when entering the card reader and not allowing the contacts of the card to come in contact with the reader. After a few attempts it worked and I just copied the photos to my external hard drive. Now the SD card is in the garbage, I also had a very close look at the other SD cards for damage. All the cards were in good shape but lesson learned.....take a close look at the SD cards as I believe this was the problem with the camera from the get go as it is the only card I was using.

Finished product

A few months ago I built and blogged about my  QRPometer build from the 4 state qrp club its a great kit. In the post there was only 2 con's that I could think of regarding the kit.
1.The TX and Antenna connections were RCA and not BNC, the kit now ships with the RCA to BNC      adapters.  
2. The meter did not come with a case and the rear of the meter had an exposed circuit board. I felt this left the meter vulnerable to damage.

No room for Oliver on the old desk

The new desk twice the size

The first half of August sure has been busy around the shack here, not busy with on air time but with getting things done. I have built the A A Engineering smart battery charger for my Elecraft K2. I will be posting the build in the near future. On this project for the first time the during the "smoke test" I actually had SMOKE!!! With kits I have found some of the final check out testing is what I call "destructive" testing as opposed to non destructive testing. Going to a destructive testing  with the Smart battery charger post. One of the kits I built just a short while ago was the QRPometer and it did not have a case...well it does now and that too is going to be another post. I am really not finished with that case yet. I was at the
electronics store the other day (picking up parts as a result of a destructive test going wrong) and saw a neat 9 volt battery holder I am going to add to the QRPometer case. I also have sold all of my items that were up for sale and I have the funds to order my Elecraft KX3. It's not going to be here until  October but that will give me time to read the manual and set up a place for the radio. While on that topic with some of my funds I went online to Ikea and purchased a much needed larger table for my kit building. The old desk was just way to small and things were falling off. The old table was actually a computer desk and it now is off to the side in my shack with an  iMac (27 inch screen) one that Julie donated to me!!! So the new Elecraft KX3 is going to run on Mac software.

iMac waiting for the KX3

F8DGY's antenna

The on air time has been very limited as having to get things done around the house and shack the rig really has not been turned on. I did manage to get some radio time in late last week in the evening. I heard clear as a bell Chris F8DGY calling CQ on 20m. I dropped the K3's power down to 500mW's and gave him a go. He came right back to me with a 579 report. It was a fast exchange and he was off answering others. For me that that a 7,597 miles per watt contact.