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Need Help Idenifying Interference on Voice of Korea Broadcast
Thanks. That is very helpful. I am new to all of this, and trying to
figure it out. I think that most of the noise is actually coming from my house, and if the wire picks it up, it is probably near to where ther eceiver is. I just ran to wire high, to see if that helps, and tomorrow i am running a new, longer length that will be even higher. If that is still noisy, then I am going to look into running coax from the wire (connecting near the roof), to the receiver. I need to read up on that some more. Also, I dont have the wire grounded. I have been reading on that also, but am not yet clear on what, if anything i actually need to do. mike Dave wrote: Longer wire probably would help. I am using two twisted pairs, twisted together (old phone wire, to be more exact.) This, I believe, gives a better signal than just a single wire, but it is not that significant. Length is far more productive in my experience. One question: does your wire run by an air-conditioner or anything like that? Such a device would definetly cause noise on your antenna. I run the wire into a piece of 50 ohm coax to get it by my air conditioner, and ground that first where it comes off the roof and down to the ground and again where it goes up and into my window. Totally quiet, when overall background noise drops out enough to notice. I also inductively couple this to my whip antenna, to gain the extra boost from the preamp attached to the whip. (Have a plug that fits the external antenna jack, and clip this to some wire wrapped several times around the whip.) If any of this helps, let me know and I will see if I can come up with anything else... Regards, Dave "Mike Chambers" wrote in message news:2006122911392716807-mikechambers@gmailcom... I have got about 40 feet of wire in my backyard (running up a very steep hill). I have the same issue as you, where if I dont connect the wire, then the signal is too low to really pick up. Would it help if I had a longer wire? mike On 2006-12-29 11:25:55 -0800, "Dave" said: I've managed to pull them in on 9335 a couple times (at 1300 UTC) but it always fades out on me as the sun continues to climb. And I'm in Houston with a 7600GR and about 110' of longwire on the roof. What is your setup? When I was using just the whip antenna the S/N ratio was so low that I couldn't make out anything other than the announcement that I was listening to Voice of Korea. Nothing else recognizable, but it was all just background noise. Dave |
#12
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Need Help Idenifying Interference on Voice of Korea Broadcast
Telamon, Thanks for the hint! Tonight once if got dark, the
interference started up again. I went out to the corner, and sure enough, the light was out. I took my radio out there, and the interference was definately from there. Once my eyes got used to the dark, I could even faintly see the light trying to come on (in sync with the interference). Now I just have to figure out how to get it fixed. thanks again... mike On Fri, 29 Dec 2006 11:17:10 -0800, Telamon wrote: Sounds like a bad street lamp trying to turn on, failing, and cycling. -- Telamon Ventura, California |
#13
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Need Help Idenifying Interference on Voice of Korea Broadcast
"Mike Chambers" wrote in message . .. Thanks. That is very helpful. I am new to all of this, and trying to figure it out. I think that most of the noise is actually coming from my house, and if the wire picks it up, it is probably near to where ther eceiver is. I just ran to wire high, to see if that helps, and tomorrow i am running a new, longer length that will be even higher. If that is still noisy, then I am going to look into running coax from the wire (connecting near the roof), to the receiver. I need to read up on that some more. Also, I dont have the wire grounded. I have been reading on that also, but am not yet clear on what, if anything i actually need to do. mike For grounding, I bought two eight or ten foot grounding rods from Home Depot (copper coated steel with one end pointed and the other having the edges rounded off) and drove them into the gumbo we call dirt around here with a three-pound sledge (I think.) Got some grounding blocks from the local parts depot and clamped them onto the rods with clamps also from Home Depot. Fed the coax into and out of the grounding blocks so that the shield of the coax made contact with the grounding blocks. Did this where the coax came off the roof, and where it went into my window, so that the air conditioner that the coax went past didn't cause any interference, and have a nice quiet connection. Good luck. Don't hesitate to ask if you have any questions. Someone will have the answer. Dave |
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