Last night was my first night / morning to try to pull in the Voice of Korea. However, I did not have much success due to some pretty strong interference.
I am trying to determine the source of the interference (i.e. another broadcast, or something electrical in / near my house).
Does any have any idea what the source of the interference might be? Also, is anyone in the San Francisco area able to pull in Voice of Korea at 9335 (or any other frequency)?
Mike Chambers wrote: > Last night was my first night / morning to try to pull in the Voice of > Korea. However, I did not have much success due to some pretty strong > interference.
> I am trying to determine the source of the interference (i.e. another > broadcast, or something electrical in / near my house).
> Does any have any idea what the source of the interference might be? > Also, is anyone in the San Francisco area able to pull in Voice of Korea > at 9335 (or any other frequency)?
Mike Chambers wrote: > ... > Does any have any idea what the source of the interference might be? > Also, is anyone in the San Francisco area able to pull in Voice of Korea > at 9335 (or any other frequency)?
In article <CL6dndW1GZGU_QjYnZ2dnUVZ_uS3n...@comcast.com>, Mike Chambers <mikechamb...@gmail.com> wrote:
> Last night was my first night / morning to try to pull in the Voice of > Korea. However, I did not have much success due to some pretty strong > interference.
> I am trying to determine the source of the interference (i.e. another > broadcast, or something electrical in / near my house).
> Does any have any idea what the source of the interference might be? > Also, is anyone in the San Francisco area able to pull in Voice of Korea > at 9335 (or any other frequency)?
Sounds like a bad street lamp trying to turn on, failing, and cycling.
> Last night was my first night / morning to try to pull in the Voice of > Korea. However, I did not have much success due to some pretty strong > interference.
> I am trying to determine the source of the interference (i.e. another > broadcast, or something electrical in / near my house).
> Does any have any idea what the source of the interference might be? Also, > is anyone in the San Francisco area able to pull in Voice of Korea at 9335 > (or any other frequency)?
> mike
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.
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" <db5...@hotmail.com> 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.
That file was uploaded 2/10/2006, but I've listened to Voice of Korea about two weeks ago. [Hey, it's painful to listen to that crap.]
I'll do another recording, but basically that is how it sounds. It's a reasonably strong signal in the bay area. The recording was done in the east bay.
Try your radio on Ocean Beach, Marin Headlands, etc. I think your noise is local.
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" <mikechamb...@gmail.com> wrote in message
>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" <db5...@hotmail.com> 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.
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.
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" <mikechamb...@gmail.com> 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" <db5...@hotmail.com> 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.
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. 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.
> On Fri, 29 Dec 2006 11:17:10 -0800, Telamon > <telamon_spamshi...@pacbell.net.is.invalid> wrote:
> >Sounds like a bad street lamp trying to turn on, failing, and cycling.
> 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...
No problem. The power company in your area probably has the responsibility to keep the lights functional. Go to their web site or phone them with the pole number and location description to report it. They will get around to fixing it in a few days.
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