AmateurRadio.com

RFI Friday night

My last post dealt with my PC monitors causing me some grief in the form of RFI to my K3. On Saturday I spent most of the day spinning my wheels trying to find a way to lesson or better yet cure the RFI problem. Below is what I had tried to in order to fix the problem.
1. I changed out the video cables and wrapped them with chokes as well.....did nothing.
2 Moved the monitors to other locations on the operating desk...that was loads of fun and it too did nothing.
3. Tried running the K3 just off battery power and.... nothing.
4. Ran the monitors from the 12 volt Astron power supply and again nothing.
5 Put snap on chokes on ALL cables coming out of PC and the ALL cables from each monitor.....NOTHING!
6. Even tried tin foil on the back of the monitor and grounding it...only made monitor look sci-fi.
7. Put 1:1 balun on the coax coming out of the K3 and still had problem.
8. Tried my Elecraft K2 (maybe just a K3 problem) found same issue with K2.

Sunday...not to bad

9. Plugged monitors into separate AC outlets on different circuits and did not fix issue.
10. Ran a ground up to each monitor and video card on the PC (PC is already grounded) and nothing.
11.Repositioned screen to see if that made any difference I thought it did but turned out not to.
 So that was how my Saturday was spent and from doing all the above I was able to find out a few things that I hope may ring a bell on how to solved the RFI isssue
1. As I move my hand closer to the monitor the RFI increases.
2. When the rig is on the dummy load the RFI is gone.....but so is everything else regarding signals.
Now it's Sunday and I have come to the understanding that I am going to just have to live with the problem. I know where it is coming from that sometimes that is half the battle! I am going to do some reading and thinking about the issue. I came into the shack to just roll the desk back up against the wall and tidy up the room. I then turned on the K3 along with the PC and for some reason the RFI is still there but not as much at all!!! Seems doing nothing is doing something!!

RFI from new monitor

This evening I was on the radio and had the Elecraft P3 up and running as always. I just happend to be looking at the P3 external monitor when my PC's monitors went into sleep mode. I noticed that some signals (now seen as RFI) dropped off the screen. I had noticed these signals before and knew it was RFI but had

Both monitors off

 no idea it was coming from the monitors! My new AOC e2351F LED monitor seems to be the major culprit but the Acer Z233h does add just a little on it's own. If I turn the monitors off (via the monitor button) the RFI is gone or if the monitor goes into sleep mode. You can see from the picture to the right where the RFI was from the tails. So the question now is how does one go about narrowing this down? I have power supplies to each monitor...but would they be the problem if the RFI is gone when the monitors are turned off but supplies are still plugged in? Can you ground a flat screen monitor to my station ground? Could the RFI be traveling down the monitor cables? Well this is just another project to keep me busy. I am lucky that the RFI is not the same on all bands these shots are from 18mhz and it seems to be the worst of them all. Any ideas blog world??

Back in December when my second Elecraft K2 kit arrived I tossed around the idea of starting an additional blog about my K2 build. I planned to not only document my kit build but to keep the site updated with links and sites that will help out fellow builders. I have up to this point produced 3 pages and some updating posts on the blog itself. Check out the blog and give me  your feedback as well as any info you would like to see on the site as well.

Monday was a holiday here in Ontario called family day Julie is taking some photography course's and with that comes homework. Today she had to get out side and take some pictures we came up with the idea of a raptor bird sanctuary not to far from home. I also got to thinking that while she was snapping I could be dahing and ditting on my KX3!! This was a win win for the two of us we were out spending time with each other (kinda) and doing our hobby's  to boot. My setup was the Elecraft KX3, mobile whip on a diamond trunk lip mount. The temperatures outside were way to cold for me to venture out. During the evening it dropped to -17C and during the day was up to -10C. I opted to stay in the car with the sun shinning in it was very comfee and a little to warm at times. We were there for about 2 hours, I was able to make just one contact. But it's all about having fun with the radio and getting out. Joe W2KJ is from North Carolina and was also running a KX3 (my first KX3 to KX3 QRP QSO) at 4 watts. I found Joe calling CQ on the 20m QRP frequency. We gave each other 559 reports and some antenna info, name, QTH, power and then it was time to move on.  My KX3 being set at 1 watt gave me a miles per watt contact of 644.

So why did I title this post "To close for CW comfort" this has to do with the other CW "events" that I was exposed to! I have read about this in other blogs from other op's which are CW operators who seem for some reason to blend letters together regarding their call. I had at least 6 op's who's call I had a very very hard time making out. There was one DX station who's call ended in WVR BUT for the longest time I was not sure if it was W##, even the code reader on the KX3 was having a real hard time. I then ran across 10+ on the S meter  European station but I could not give him a call as I had (and I mean NO CLUE) what his call was!! It was very hard to tell were the CQ  stopped and the call was being sent. Now folks for any of you reading my blog and who also have had a CW QSO with me I know my code elegance has left you scratching your head at times.....but I just can't understand how code that has no spaces and just runs as one long word how these op's ever get answers to their CQ requests.
When I got home I put my Elecraft k3 into test mode (meaning no code is sent over the air) and tried to send some sloppy code and watched to see if the K3 was able to decode. (you can setup the K3 to not only show incoming code but also your code as you send it) The only reading the K3 would give me were not letters or numbers just lots of  *****......translation...the K3 also has no idea. As with most CW op's out there you also have your code being sent to you through  your headphones. Does the code not sound odd to these op's???
Anyway time to get off my soapbox now.............

Julie was out and about snapping shots!!

For me the ARRL  DX CW contest is over, I have some blog, email and cleaning to do for the rest of the day. Over all the contest was a success for me not that I broke any records with regards to points or number of contacts. I was very pleased with how the station and antenna were working, I find that contests are a great way to see how the rig and antenna preform. With regards to the rig and software I merged N1MM logger and N4PY rig control software through LP-bridge and as an added bonus I was able to also use the Flexradio's flex control vfo knob.....now that was a mouthful!! Lets break this down shall we N1MM is the

At 40mW and below this is the reading

contest logger that I use, N4PY is the software I use to control my K3. LP-bridge is a virtual port program that allows these two programs to somewhat talk to each other. I say somewhat as there are some minor issues. (there is another virtual port program VSP manager that allows perfect integration but I did not want to install it just before a contest) Oh and the FlexRadio FlexControl works fantastic with N4PY's rig control program and through LP-Bridge also works with N1MM as well. Another software program I ended
up purchasing was MRP40 cw decoding program. Now my code is not to bad at all but during contests I have found that for some reason some stations send at the speed of sound. (not sure why as they may loose more contacts that gain as folks just move on being not able to understand the fast code) For those stations this is were MRP40 shines.

Programs running during the contest

This is as far as I am concerned one of the best decoding programs. For those who want to participate in a CW contest but your code is not up to par this program will get you in on the action.  It's not free but is well worth the money!!

That was the software success for the contest other great events were being able to keep my power down to 1 watt....except for 2 contacts were the power creeped up to 3 watts. Did I say the power was kept to 1 watt? That was for a total number of  6 contacts the rest of the DX contacts went into the log with power numbers varying from 10mW's to 900mW's!!
Here is how the power numbers broke down
Contacts          Power
2                      10mW
13                     20mW
2                       40mW
4                       50mW
14                     100mW
22                     500mW
12                     From above 500 to 900mW
6                       1 watt
2                        3 watts

77                      TOTAL
I did say there was some records broken here at VE3WDM and they are
1. 69 DX contacts with under 1 watt in a contest!
2. Miles per watt bar is set higher.....CR3A with 10mW is 344,468 miles per watt 
                                                       DL6FBL with 10mW is 400,126 miles per watt

10mW on the QRPometer

I was not concerned about QSO per hour rate as at these power levels most of the time I had to try more than several times to make a contact. My radio equipment was (for those of  you wondering) the Elecraft K3, Elecraft P3, QRPometer, LP-100 meter, Hendricks 41dB attenuator and the last but not least the monster antenna......an attic dipole the Alpha Delta DX-EE.......that's right an attic dipole!!

In the thick of things

Well I am in the thick of things with the ARRL CW contest and as for my goals....I wanted to stay below 5 watts and try to get as many QRPp contacts as possible. Up to this point my QRPp contacts in the contest are at 92%!!! Because I am making mainly QRPp contacts the total contacts up to this point is suffering as I have to take the time to make the QSO. If there is even a faint signal coming back to the DX station I have to wait in line and sometimes these lines are over 5 minutes, this affects my total contact count big time. Some of the highlights up to this point in the contest are..........

1. Contacted DL6FBL with only 10mW's for a miles per watt total of 433,756 per watt an all time record  for me.
2. As was already mentioned 92% of contacts are QRPp and a majority of those are at or below 500mWs.
3. There are so far 9 contacts at or below 50mWs and again all these contacts are DX and not U.S stations.
 As for the rest of the goals like getting up early and racking up lots of time on the contest.........well the bed was sooooo comfee this morning it was very hard to get up and out before 8am! So that goal up to this point has not been met...but there is Sunday!! (dreams are free they say)
As for spending more time in the chair that will have to be weighted out on Sunday evening when the total time on air is looked at.
Contest on....it's off to 40m and maybe 80m as well..........will keep you posted

New monitor in place and ready for ARRL CW contest

Very dusty

This week a new monitor came in via UPS as my old standby monitor after many years of service bit the dust. I ended up ordering the AOC E235F monitor to match my other two 23 in monitors. Oh as a side note if anyone out there has an AOC monitor with a white square that shows up in the upper left hand corner shut off the picture boost bright frame option, which can be found in the monitors menu. Anyway.......With this nice new monitor up and running I did notice only one monitor seemed to be real sharp?? I then did some investigating and found out that my video care (Geforce 9400GT) had
one DVI and one VGA output port. It was the VGA port that was not allowing my new monitor to shine with all it's resolution. I ended up purchasing the Zotac Geforce GT 620 video card. This has two DVI outputs and as with the other care supports dual monitors. A small part of the day today was spend

Rear view of  PC

New on left old on right

removing the Geforce 9400 card and replacing it with the new Zotac GT 620 card. It was great to have the PC out and on the test bench I was able to give the interior a good cleaning. It's very surprising how much dust gets in there and to have the processor nice and clean and running cool will extend the life of the chip. The picture of the back of my PC shows many clip on toroid around most if not every cable as well there is a ground wire grounding the cabinet as well. I also put some snap on chokes on the DVI cable to the new monitor. This way my PC and monitors are RF free!