electricial shock possible?

Discussion in 'Amateur Radio Amplifiers' started by KD2AAG, Apr 6, 2012.

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  1. KD2AAG

    KD2AAG Ham Member QRZ Page

    hello everyone i am a newly licsened ham heres the problem i moved to a new appartmet i operrate on mostly 10 meters running 200 watts pep well all my equipment is grounded amp radio power supply along with the an tenna . my amplififier is capable of atleast 800 watts pep and is a tube amp i drilled through the basemen t flloor put a 5/8 x 8 foot ground rod ,antenna has a 10foot x 5/8 rod well my neighbor in same building is complaning of electricial shock is this at all possible ?
     
  2. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    Electrical shock? I doubt it.

    But "RF" burns might be possible if he's really close to your antenna. That wouldn't be harmful but might cause slight discomfort (warming). He'd have to be really close to your antenna, I think.

    I ran 1 kW output from an apartment using antennas in the attic back in the early 70s and other than "TVI," nobody noticed anything. In our apt, we didn't even have TVI (pre-cable, pre-satellite) because I had a good TV antenna up there also and signals on TV were very strong.

    I'd go visit the neighbor to find out what he's talking about. It's possible that he could get slight tingling RF burns off of water faucets and other metal stuff while you're transmitting. But your antenna would have to be really close.
     
  3. KO6WB

    KO6WB Premium Subscriber QRZ Page

    He may have other problems. Like a bad neutral connection on his power panel, faulty grounds or ?. It is not likely he is getting a conventional type "shock" from your operations. As stated it could be a RF exposure problem. Did you do your exposure survey? You may need to move your antenna away from that direction. Have your neighbor write down when he is getting the "shocks" and you keep a log of when you are operating. Then compare them. If they match you will be the problem. You can turn the antenna 90 degrees and that might help. Reducing power will help. Changing to another band might help. Moving the antenna farther away will have the most impact.
    Take a look at; http://hintlink.com/power_density.htm.
    Or you can get information from; http://www.qsl.net/w0jec/index_files/W0JECProjects3.htm.
    Don't forget to take your duty cycle into consideration when doing the calculations. If you neighbor is getting RF from his fixtures then your duty cycle is irrelevant because it is instantaneous in nature. The above suggestions will help.
    Hope this helps
    73
    Gary
     
  4. W1QJ

    W1QJ Ham Member QRZ Page

    you sank a ground rod, right? Did you bond it back to the electrical system ground rod? NEC requires this for just the reason you might be experiencing
     
  5. KA9JLM

    KA9JLM Premium Subscriber QRZ Page

    Sounds like your neighbor now has someone to blame for a wiring problem that was there before you moved in.

    You may be at risk of shock, If your grounds are not connected together.

    If it is near field RF, then that can be tested using a florescent bulb with a piece of wire connected to it.

    73
     
  6. G4LNA

    G4LNA Ham Member QRZ Page

    Yes, it might be nothing to do with you at all, did you ask him if he has always had that phenomenon? If he has it might be just good old so called static electricity. I have this problem, I seem to be susceptible to it, I'm like a walking Wimshust machine at times at work :eek:
     
  7. KO6WB

    KO6WB Premium Subscriber QRZ Page

    Do not use a fluorescent lamp in his house. A field strength meter would be better and he will not really know what the readings mean. Seeing a fluorescent lamp light up would probably scare him to death. Every ailment he latter comes up with, no matter what the actual cause, will be all your fault. The general public is poorly informed on what an exposure to RF can and cannot do. The media has taken a stand on this that defies factual data and is scaring the public in a needless manner.
    Yes, connect the grounds together. Use #6 wire. At the power level you're running it would be very difficult for your new ground rod to cause any problems in a neighbors place.
    He has problems and he is convinced it you're causing it. Like I said, have him keep a log of when he is getting these "shocks" and you keep a log of when you are operating. Unless you are operating 24/7 then there should be a definite pattern one way or the other.
    Good luck.
    73
    Gary
     
  8. KA9JLM

    KA9JLM Premium Subscriber QRZ Page

    Thanks Gary,

    You could be right.

    I use fluorescent lamps in my shack and they work great, If RF is in the shack.

    But if the neighbor seen one light up, I guess they would freak out.

    I think ham radio operators get blamed for Everything once a neighbor knows you have a CB. lol

    They don't even know what you have, but they will say your CB is messing up my TV.


    73
     
  9. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    KD2AAG:

    Where is your antenna located and what type?
     
  10. K1ZJH

    K1ZJH Ham Member QRZ Page

    Does he feel a tingle only when you are transmitting, or all the time??

    Pete
     
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