Tag: RFI

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Last Saturday I entered the Melee Tara RTTY contest. I woke up early at 5:30 AM and eat breakfast in the shack. I did want to make a flying start and score some early Q’s.
But unfortunately I did not prepare so N1MM was in CW modus since the last contest.

I didn’t get FSK operational for at least half a hour when finally found the option: [Enable both Hardware & Software PTT]. That did the trick. Full throttle at 40m, but there were only about 4 stations to work…. Well, let’s call CQ then. Also no luck. After 1,5 hour I had 6 Q’s in the log. OK, Tara RTTY isn’t a CQ World Wide of course. I have to remember that. Propagation was just fine and I hopped from 40 to 20 to 15 and even made 5 Q’s on 10 meters. But at the end of the afternoon, when I wanted to get back to 40 meter, I got a phone call of one of my neighbors. He complained about “stripes” on his TFT-monitor and wanted to know if it was my “hobby” causing this interference. I went over to his place and put some ferrite clamps around the cables. Unfortunately his TFT is just a few meters away from my FD-3 wire. So no matter what I did (turning the output power low, click on 12 ferrite clamps etc) the stripes are there to stay.
Since he had a deadline to work to I decided to wait that evening until he quits his computer work. But when he did quit around 9:30 PM, 40 meter was almost empty again. So no decent score. Anyway, had fun working in RTTY again!

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JARTS WW RTTY 2013 scoreThis weekend I was all prepared for the JARTS WW RTTY contest. Propagation is great at the moment, around 9 am 10 meters is wide open. Saturday morning around 5:30 I was in the shack making QSO’s. Balancing between family time and contesting the whole weekend, Sunday evening at 10 o-clock I was done with it. With 303 QSO’s in the log the contest was done for me. Finally I’ve worked a great deal of Japanese stations (even on 15 meters were my FD-3 isn’t resonant) and some other new DXCC’s like Hong Kong, United Arabic Emirates and a few I didn’t have yet.
My set-up works great on 20, 15 and 10 meters. On 40 meters I must power down to around 20 watts to not have too much RFI in the shack. My homemade FSK-cable is not working at higher power levels and my keyboard is going nuts causing N1MM doing all kind of crazy things.
I think the shack is a little too close under the antenna. The fact that I don’t have a earthed wall outlet in my shack don’t help either I guess.

I’ve got to find out how to fix this before the next contest (coming weekend, CQ WW SSB). Nice quest for this week!

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4300_mc-60_mod-20110525104217It used to sit in the corner of my desk, my Kenwood MC-60 microphone. Although it has a suburb audio it also has so much RFI which makes it useless. On my to-do-list: search the internet to fix this problem so I can use this nice mike.
Finally I found the easiest fix there is for the RFI-problem with the Kenwood MC-60! Open up the bottom plate and just solder a 10NF capacitor between the blue wire and on the connector which connects to the rig (see picture). And done you are! No more RFI. If only I had knew this issue was so easy to fix, I could have start use the MC-60 a long time ago!