MP-1 Super Antenna and this weekends contest - Contesting Forum at eHam.net

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eHam.net Forum : Contesting : MP-1 Super Antenna and this weekends contest

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MP-1 Super Antenna and this weekends contest	Reply
by WD0CNZ on March 8, 2009	Mail this to a friend!
Hello all, I started out Saturday 7 March 09 just trying to work on my North America QRP Assoc. challenge of the month, which is to work as many stations CW as possible. After 3 CW contacts on 40 meters, I jumped to 20 meters and found the ARRL Contest going on SSB. I use an FT-817ND and an MP-1 Super Ant on the tripod indoors. I went ahead and called a Czec Republic call and I got through with 5w SSB and the MP-1. Worked a few others and had to run some errands. On the way around town it occured to me to hook up my FT-857D to the MP-1 and see who I could get. With Ant indoors still, I worked many caribbean stations, Belgium, Denmark, France and Alaska. Wattage ranged from 35w to 100w. The MP-1 worked like a champ. Not only a great QRP match for the 817 but a great match with the 857D. If you think this antenna does not work......you really need to give it another shot. I used the stock radials with 40/20/15 meters. All was fine. 73--Don WD0CNZ

RE: MP-1 Super Antenna and this weekends contest	Reply
by KB9CRY on March 9, 2009	Mail this to a friend!
If you think this antenna does not work...... Maybe it was good propagation?

RE: MP-1 Super Antenna and this weekends contest	Reply
by K2LGO on March 9, 2009	Mail this to a friend!
I'd be worried that using an antenna like that indoors even with moderate power would exceed the safe RF radiation limits for a person so close...Any opinions...

RE: MP-1 Super Antenna and this weekends contest	Reply
by N2UGB on March 10, 2009	Mail this to a friend!
Congrats with the QRP results and the MP-1 indoors. Do you use a tuner or are you able to fine tune the SWR down without that aid? Is the whip the provided short one or are you using a longer one? I'd be careful about having the antenna and 100W too close but perhaps you have it in another room. Be that as it may...good going.

RE: MP-1 Super Antenna and this weekends contest	Reply
by WD0CNZ on March 12, 2009	Mail this to a friend!
Probably should have been clearer in my posting. I moved the antenna out on the deck for the 100W portion of the contesting. Not going to cook the wife and 5 year old. All my QRP is done with the antenna indoors. I forgot the length of the whip, but it is the one that came with the antenna. I use an LDG Z-100 AT with the MP-1 to fine tune it. I go by listening first for the highest noise level and then use the tuner. I marked the coil for 20 and 40 and get a solid green light on the tuner which means 1:5 to 1 or less on SWR. I may pursue getting a larger whip. This is not a permenant configuration. I would like to put a stealthy vertical or long wire out side and get a real shack set up. This is only temp but working out nicely. I have added about 5 more states since the original post. 73--Don WD0CNZ

RE: MP-1 Super Antenna and this weekends contest	Reply
by WD0CNZ on March 12, 2009	Mail this to a friend!
25W was the highest I transmitted indoors. Went back and read the original post and in is misleading with the sentence "With the antenna still indoors........worked blah blah.

RE: MP-1 Super Antenna and this weekends contest	Reply
by WX7G on April 11, 2009	Mail this to a friend!
K2LGO: The RF levels will be below the FCC limits within a couple of feet when running 100 W. There are several online calculators for this. I use EZNEC to get a better number. The online calculators assume a far-field E/H ratio, which is not what we have close to an antenna. In any event if you can't see it it can't hurt you.

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