Posts Tagged ‘MFJ 1788’
The MFJ 1788 is on the air and a contact in log!
Not the best shot but it's an evening shot |
Time to look inside the MFJ 1788
Taking a close look at things |
Checking the cap fins |
Some of the many nuts that were very loose. |
Control wire torn off. |
WHAT an SWR of 99:9!!
The other evening I had an opportunity to get on the air it has just been to long and I was very excited about spinning the dial around the HF band! I ran the coax out to my MFJ 1788 on the balcony and fired up the K3. I jumped on 20m were not to much was happening but on 30m there was some Dutch DX that was calling CQ so I thought I would give them a go. Prior to calling my SWR on the loop antenna was tuned to 1.2:1 BUT when I started to call the Dutch station my SWR readout on the K3 magically became 99.9:1!!! It was like the coax had been removed from the antenna and was sitting on the ground. It was late so I wanted to look into this at a later time, this evening was the later time so I hooked the antenna up and gave 20m a go and the SWR once again on the K3 was showing 99.9:1. It was time to trouble shoot, was it the coax, MFJ 1788 antenna, the K3 or my LDG antenna switch? The first thing I wanted to do was to remove the antenna as the problem.
I removed the coax from the antenna and in it's place put a 50 ohm dummy load. In a way I was relieved to see the 99.9:1 SWR thus removing the MFJ 1788 from the problem. Next I bypassed the LDG antenna switch and low and behold the SWR now was 1.1:1 and me saying thank god it was not my K3! So it would seem the LDG antenna switch is the problem so I took the switch cover off and looked around. I cleaned the SO-239 connectors, check the internal connections and all seemed to be great. The only problem spot to me could be the switching relays with internal contact troubles? After exercising the relays the trouble in the LDG antenna switch seemed to be ok. If the trouble comes back this is a 4 position switch and I only use 2 positions I could swap out relays and look at ordering all new relays. At this point all seems to be working well but stay tuned to see if relay swapping and ordering is in the near future.
Without LDG antenna switch |
Relay in the LDG antenna switch |
VE3WDM is back into QRPp very low power contacts!
I was feeling under the weather this weekend and thought it would be nice and relaxing to spend some time on the radio. It so happens a CW contest was in full swing the Russian DX contest. I was not into competing but just handing out points. The propagation conditions this past week were a struggle to say the least. Today the conditions were on the rebound a K index of 2 and the Sunspots were in at 27 and the solar wind was still up at 615. I parked on 15m and there was lots of DX rolling in for the contest. I made only 7 contacts for Saturday (so far) most were done with QRPp power! I was very pleased that my condo antenna was able to get out to make some great QRPp low power contacts. My K3 is only able to get down as low at 100mW's silly me I sold my attenuator thinking my contacts under 100mW's were over! I was able to make 3 contacts at milli watt power, 2 contacts at 1 watt, one contact at 3 watts and finally 5 watts. My first QRPp contact in the contest was K5WA in the states, my next QRPp contact was with EA3CX in Spain. Then finally F5IN in France with 500mW's of power.
The 7 contacts break down as follows
1. F5IN 500mW 7,500 miles per watt
2. K5WA 100mW 13,213 miles per watt
3. EA5CX 100mW 39,956 miles per watt
4. DK3QZ 1 watt 3,818 miles per watt
5. DL0AO 1 watt 3,818 miles per watt
6. HC2SL 3 watts
7. ZF2DX 5 watts
My QRP signal is spotted in Europe!
I had some down time over the weekend and felt it was time to spin the K3's VFO and see what was out there. I started on 15m it really did not seem all that busy but I was hearing some German stations so the band was open. My Elecraft P3 is great as I was able to get a snapshot of the CW portion of 15m. This allows me to not spend time moving up and down the band blindly and maybe just missing some stations as they end their transmission. One could end up concluding the band is dead and move on when in fact they just missed a station or stations calling CQ and waiting for a reply. I ended up calling CQ in and around the QRP watering hole at 21.060, in the past I have checked the Reverse Beacon Network (or RBN) just to see how my QRP signal was doing. At this new QTH
for some reason I have been only able to get spotted in Canada and the U.S. To my surprise when I checked RBN I had been spotted in Hungary, Switzerland and Germany. I was very shocked and it kept me on the band calling CQ. Unfortunately there was no answers I then moved onto 17m and was spotted in France but again no answers to my CQ! I then ventured down to my standby band of 20m and found F5GPE Pierre calling CQ. His signal was in around 559 and I gave him a call and he came back to me with a report of 539. I did send him an email thanking him for the contact, he did get back to me giving me more details about his setup.
P3 on 20m showing some signals |
ARRL CW Contest done QRP style
Oliver is asking……"Ahhhh dinner!!! |
The rig setup |
Score rundown is as follows
Contacts DXCC's Points
81 39 9360
The equipment used was the Elecraft K3 with 500,400 and 250 inrad filters, the Elecraft P3, Begali Contour Key and the Flex control external VFO knob and last but not least the MFJ 1788 Magnetic loop antenna. The software used were N1MM+ contest software, N4PY rig control software and MRP40 CW code reader for the chain saw speed code. I never had Murphy pay me any visits during
The contest software |
Monday brings two dx contacts
Monday was a stay in and stay warm day oh and also I was able to fit in some ham radio time as well. Next weekend is the ARRL CW DX contest weekend and since I had time on my hands I thought I would finally install N1MM+ on my PC. Up to this point I have been using the older version of N1MM, the only time for me to update was just before a contest. According to Murphy's law if you update your contest software just before a contest bad things will happen! N1MM+ has some nice new features all of which I have not tried as of yet. While I was setting up and getting to know N1MM+ I had my K3 on and was rolling around the 20m band. I was able to make 2 DX contacts the first one being IK3VUT from italy. He was calling CQ and he came back to me on my first call to him. This was not your typically fast contact Luca gave you a report but also shared his name, thanked me for answering his CQ and asked my name. It was not a long QSO but it was nice to not just have a 599 and move on Luca gave me an honest 559 signal report.
late afternoon it was time to go out with Julie who had a photography assignment that involved us going downtown (Toronto) for some shots she needed to get. It sure was cold out but soon we would be back to our warm home and just a little more radio time as she edited some photos. This time on 20m I heard HC5AI calling CQ from Ecuador and after some going back and forth he got my call and the contact was made.
late afternoon it was time to go out with Julie who had a photography assignment that involved us going downtown (Toronto) for some shots she needed to get. It sure was cold out but soon we would be back to our warm home and just a little more radio time as she edited some photos. This time on 20m I heard HC5AI calling CQ from Ecuador and after some going back and forth he got my call and the contact was made.