Posts Tagged ‘MFJ 1788’
IARU HF World Championship contest
I always enjoy participating in this contest and in years gone past it allowed me add to my DXCC list. This year was a whole other story.......I was only able to contact and hear Canadian and U.S stations only. I came across a VE2 station calling CQ and he sounded like a distant DX station! I was not sure if it was just my station not hearing any Europe stations. I decided to listen in on a few of the big gun U.S station to see who they were contacting. The stations I choose to listen in on were contacting fellow U.S and Canadian stations only. I made 10 or so contacts all on 20m and with 5 watts QRP. My station setup was the Elecraft K3, MFJ 1788 loop antenna on the balcony, N1MM+ logging software and Win4K3 Suit rig control software. Also I use MRP40 CW decoding software for the "machine gun" code senders. I found in this contest the top end code speed was in around 35 wpm so no decoding software was needed. I have not been on the radio much as work has been very busy once again. It was nice to sit down and get on the rig again, I knew it had been a long time away from the radio when I wanted to spot a CW station and I had to actually look and look for the spot button on the rig!
IARU HF World Championship contest
I always enjoy participating in this contest and in years gone past it allowed me add to my DXCC list. This year was a whole other story.......I was only able to contact and hear Canadian and U.S stations only. I came across a VE2 station calling CQ and he sounded like a distant DX station! I was not sure if it was just my station not hearing any Europe stations. I decided to listen in on a few of the big gun U.S station to see who they were contacting. The stations I choose to listen in on were contacting fellow U.S and Canadian stations only. I made 10 or so contacts all on 20m and with 5 watts QRP. My station setup was the Elecraft K3, MFJ 1788 loop antenna on the balcony, N1MM+ logging software and Win4K3 Suit rig control software. Also I use MRP40 CW decoding software for the "machine gun" code senders. I found in this contest the top end code speed was in around 35 wpm so no decoding software was needed. I have not been on the radio much as work has been very busy once again. It was nice to sit down and get on the rig again, I knew it had been a long time away from the radio when I wanted to spot a CW station and I had to actually look and look for the spot button on the rig!
Can this be done??
I have been using a PC program called Morse runner and going to the LCWO website to increase my contest cw receiving speed and keyboard skill. I wanted to take it up a notch to what I consider a must have contest skill. The skill I am referring to is the ability to exchange contest info with my Iambic key ( Begali Contour) and not only the keyboard. Both Morse Runner and the tools from the LCWO site have been a great help with improving my keyboard and receiving speed and moving it forward. What I'm looking for and asking my blog readers input on is......a PC program similar to Morse Runner were I can use my key to interact with the program. Morse Runner sends you a call, you enter the call in the program (it checks you have enter proper call) then a contest report comes your way you enter it and the program sends your report. If all the info checks out as correct you are able to move on the the next contact. Does anyone know of a PC program out there were I can use my key and not keyboard to brush up on my key proficiency within a contest environment.
Oh and by the way of a radio report..... I was on the rig yesterday not much going on the CW portion of 20m and 30m during the early part of the afternoon. I ventured back around 22:00 UTC and 20m was sending some DX my way. Some of the stations heard but I was unable to contact were LZ300MSP (that call is a key full), T77CS, EA3AIZ from Spain struggled to hear my QRP signal but there was just to much QSB at his end. All was not lost DL3DXX heard me in Germany and gave me a 559 report.
Oh and by the way of a radio report..... I was on the rig yesterday not much going on the CW portion of 20m and 30m during the early part of the afternoon. I ventured back around 22:00 UTC and 20m was sending some DX my way. Some of the stations heard but I was unable to contact were LZ300MSP (that call is a key full), T77CS, EA3AIZ from Spain struggled to hear my QRP signal but there was just to much QSB at his end. All was not lost DL3DXX heard me in Germany and gave me a 559 report.
MFJ 1788 vs Weather
As like everywhere else it seems the weather up this way is as up and down as the solar conditions! Up this way we have been breaking records with both high and sometimes low temps. Along with this crazy weather comes conditions that can be very hard on our antenna systems. I have read on many blogs of fellow hams dealing with antenna damage due to wind, ice and heavy snow issues. My antenna foot print is a very small one and so I thought sheltered from many of the issues others have been dealing with. Here is my weather related antenna issue to add to the list of weather mishaps. On Wednesday this week Julie and I came home from work and she announced (as she was looking outside) “your not going to like this”. Not very comforting words as I had a look for myself and saw that the high winds had their way with my antenna! I have an MFJ 1788 mag loop antenna. It’s mounted on a tripod on our balcony of the condo. The wind had toppled it on it’s side and then tossed all around the balcony as well. I understand to most of the other hams out there with weather damaged antennas, mine is a walk in the park. In my humble opinion this is the only antenna I have, it’s not cheap to replace and I am very limited on my antenna choices. As a side note I usually place the antenna off to the side when not in use and that way it is totally sheltered from the elements. I admit I was lazy and figured it had been ok for a week with the antenna in that position………..WRONG! I stood the antenna back upright and there seemed to be no broken parts all was in tacked. I crossed my fingers turned on the K3 and gave the antenna a go, the lowest the SWR would go was 4.0:1 and higher on other bands……not good. Below are the steps I went through to eventually fixing the antenna:
In the above picture the 3rd fin from the left was perfect centre and all others had to match.
2 2. I then inspected the PL-259 connector just to make sure it was fine and not on it’s way out due to unforeseen damage. It was ok as well.
3 3. I then brought in the MFJ 1788 antenna into the house and first had a look over of the outside case, SO-259 and the antenna loop. All seemed good this way.
4 4. It was now time to open up the plastic housing and have a look inside, I have had the antenna apart on occasion for routine maintenance so I had an idea of how things should look. There was no obvious signs of damage to any of the major parts.
5 5. It was now time to connect the coax and run the internal variable capacitor to the end of each stop via the control box.
Here is where I noticed two problems:
· A.The spacing between the stationary fins and rotating fins was not equal at certain points along the variable capacitor.
· B. When the capacitor was fully seated in one direction both the stationary fins and rotating fins should sit flush with each other and some on the rotating section were sitting higher.
To fix the spacing problem (which I had to do then the antenna was shipped to me) I used a screw driver to manipulate the fins to even up all the air gap between fins. To repair the fins that were not sitting flush I was able to loosen a nut on the shaft that held all the moving capacitor fins in place. I then was able to adjust the fins that were sitting to high and make them all flush.
It's hard to see but from the left about 7 fins over the next five fins start to look odd, this is because these fins are not sitting flush with the other fins and they had to be adjusted so they were flush.
1 6. It was not time to cross my fingers and try the antenna (with plastic cover off) and see if this was in fact the problem. I was able to turn the antenna to 1.1:1- 1.1:4 on all bands and this was with the antenna sitting on a table in my living room. It seems the problem was fixed!
2
7. I then put the plastic cover back on and again check the SWR on all bands, I wanted to make sure nothing changed……. nothing did change and all was still good.
7. I then put the plastic cover back on and again check the SWR on all bands, I wanted to make sure nothing changed……. nothing did change and all was still good.
3 8. I then re-mounted the antenna on the tripod and covered it with my canvas patio table cover….so it does not “look” like an antenna. I then tested the SWR again…it was now 8:1!!
4 9. I then removed the canvas cover and the SWR was fine again…..seems canvas was damp do to the rain that accompanied the wind that day. I put the cover in the dryer and then back on the antenna and all was well. I am now going to purchase some waterproofing spray for the canvas to keep the antenna dry.
Below is one section of the fins that have been adjusted and are back to normal position.
Below is one section of the fins that have been adjusted and are back to normal position.
ARRL DX CW contest done for 2016
The roll top radio desk |
The contest desktop |
Using WSPR for some band analysis
My wet noodle on 40m WSPR on Dec 30 2200 UTC |
30m results at 2100 UTC Dec 30th |
17m from 1500-1550 UTC Dec 31 |
20m from 1600-1700 UTC Dec 31 |
My CQ WW CW contest overview.
The QRP setup |
I did have some "Murphy" moments such as…….I was not able to get my MFJ mag loop to tune at all at the start of the contest. Very quickly I found it was a very loose PL-259 connected on the rear of the loop's control box. Then for some reason N1MM+ set my CQ zone as 5 and not 4 and I did not click into this until about 10 contacts into the contest. Finally on the K3 there is a "test" setting and I use it to check macros without transmitting. Then old age had me forget to turn off the test mode, this found me thinking I was calling stations but was transmitting 0 watts….. Now that's QRP!!
Since I am operating QRP and using small MFJ loop antenna on the balcony my operating style was as follows
- I Use my VFO B to save a strong DX station that at the time has a huge pileup going. This stops me from wasting time trying to break the pile. Better to come back when the crazy pileup is gone. This worked great when I came across a Senegal station.
- Even when a station is at an S2 level but is just calling and listening my 5 watts can and did many times make it through for a contact.
- I don't use a spotting network as I found most of these stations have a huge pileup but I do have an Elecraft P3. Using some hardware and software my P3 is seen on a 19 inch monitor and I am able to point and click on signals. My K3 then moves to that signal this allows me to see the activity on the band and Search and pounce these stations.
- When possible stay with a band such as 15m were my MFJ loop does not need to be retuned at all across the whole CW portion.
- Stick with my 250hz Inrad 8 pole CW filter so I can get between tight signals and only hear the op I want to contact.
In my post I am going to go into detail about my software I am now using and finding to be great for contesting and general QSO's It's now time to grab some eats and relax.