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#1
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I posted this message over in rec.radio.amateur.dx, but no one seems to have
any answers for me. It's perhaps a little off-topic, but since most of the posts in these parts are, it'll fit right in. And at least here I'll get some sort of response. Even if it's political. I'm just going to cut and paste: I'm new to the hobby, so please bear with me. I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the info I found at his website: http://www.drgenescott.com/swave.htm THE CARIBBEAN BEACON Anguilla, British West Indies 24 hours a day - 7 days a week 690 KHz AM 1610 KHz AM I'm listening in Seattle, and I really don't think that I've DX'd the guy all the way from the Caribbean. The signal isn't constant; it eventually faded out just like SW reception does. So my question is, just how did I hear this broadcast? Scott uses satellites, but I imagine they're geo-synchronous and so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of MW or FM band signals ever even done in the first place? And why did I receive the signal at 1615 instead of 1610? Did I pick up a repeater of some sort? I have more questions, but I think that from the ones I've just posed that everyone can imagine what they are. Thanks in advance for your replies. FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency again. (I tried reception during the day, but got nothing.) I haven't yet heard anything to indicate who it is, but I'm sure it's Scott. |
#2
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Someone *could* be rebroadcasting a shortwave, satellite or other signal
on a MW transmitter that is not PLL and has drifted a bit. Some folks think Gene Scott is like R. G. Stair -- HE'S EVERYWHERE! ;-) There might be other explanations but a cheap rebroadcast is my only guess. Perhaps someone else will have a better answer. Al ================== Honus wrote: I posted this message over in rec.radio.amateur.dx, but no one seems to have any answers for me. It's perhaps a little off-topic, but since most of the posts in these parts are, it'll fit right in. And at least here I'll get some sort of response. Even if it's political. I'm just going to cut and paste: I'm new to the hobby, so please bear with me. I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the info I found at his website: http://www.drgenescott.com/swave.htm THE CARIBBEAN BEACON Anguilla, British West Indies 24 hours a day - 7 days a week 690 KHz AM 1610 KHz AM I'm listening in Seattle, and I really don't think that I've DX'd the guy all the way from the Caribbean. The signal isn't constant; it eventually faded out just like SW reception does. So my question is, just how did I hear this broadcast? Scott uses satellites, but I imagine they're geo-synchronous and so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of MW or FM band signals ever even done in the first place? And why did I receive the signal at 1615 instead of 1610? Did I pick up a repeater of some sort? I have more questions, but I think that from the ones I've just posed that everyone can imagine what they are. Thanks in advance for your replies. FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency again. (I tried reception during the day, but got nothing.) I haven't yet heard anything to indicate who it is, but I'm sure it's Scott. |
#3
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![]() "Honus" wrote in message ... [snip] I'm new to the hobby, so please bear with me. I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the info I found at his website: http://www.drgenescott.com/swave.htm THE CARIBBEAN BEACON Anguilla, British West Indies 24 hours a day - 7 days a week 690 KHz AM 1610 KHz AM I'm listening in Seattle, and I really don't think that I've DX'd the guy all the way from the Caribbean. The signal isn't constant; it eventually faded out just like SW reception does. So my question is, just how did I hear this broadcast? Looks like a spurious response caused by your oscillator's third harmonic and the radio's poor RF selectivity. Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the local oscillator is running at 2070 kHz (1615 + 455). The third harmonic of 2070 kHz is 6210 kHz. With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will be a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455). KAIJ carries Dr. Scott on 5755. http://www.drgenescott.com/swave.htm Scott uses satellites, but I imagine they're geo-synchronous and so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of MW or FM band signals ever even done in the first place? And why did I receive the signal at 1615 instead of 1610? Did I pick up a repeater of some sort? I have more questions, but I think that from the ones I've just posed that everyone can imagine what they are. Thanks in advance for your replies. You might try checking your radio's local oscillator output with another radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune around 1615 kHz. FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency again. (I tried reception during the day, but got nothing.) I haven't yet heard anything to indicate who it is, but I'm sure it's Scott. What was he talking about? The Pyramids? Aliens? Demons? Was he yelling at the hired hands again? Frank Dresser |
#4
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![]() "Frank Dresser" wrote in message ... snip Looks like a spurious response caused by your oscillator's third harmonic and the radio's poor RF selectivity. Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the local oscillator is running at 2070 kHz (1615 + 455). The third harmonic of 2070 kHz is 6210 kHz. With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will be a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455). KAIJ carries Dr. Scott on 5755. snip I just told someone over in rec.radio.amateur.dx that I'm ready to mail my Grundig back to China with a letter enclosed telling them where they can send it from there. ![]() has been extremely frustrating. All I want to do is turn on my radio, spin the dial until I find something interesting, look it up in my "Passport" book and have that be the end of it. sigh Oh well. I might as well start wishing for world peace. ![]() You might try checking your radio's local oscillator output with another radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune around 1615 kHz. The first part of that went clean over my head. Thanks for trying, though! g FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() I'm still looking for this one. Part of the fun of this, which I didn't include in my rant above, is how I'm sharing this with my kids. I've got a big map on the wall, and we stick pins in the places where broadcasts we've received originated from. But as you all know, you can't always tell where a signal is coming from what with relays and satellites, etc. I'll just persevere. I'm going to enjoy this damned hobby if it kills me. Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency again. (I tried reception during the day, but got nothing.) I haven't yet heard anything to indicate who it is, but I'm sure it's Scott. What was he talking about? The Pyramids? Aliens? Demons? Was he yelling at the hired hands again? No, I wasn't that lucky. It's good to have something to look forward to, though. |
#5
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![]() Honus wrote: "Frank Dresser" wrote in message ... snip Looks like a spurious response caused by your oscillator's third harmonic and the radio's poor RF selectivity. Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the local oscillator is running at 2070 kHz (1615 + 455). The third harmonic of 2070 kHz is 6210 kHz. With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will be a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455). KAIJ carries Dr. Scott on 5755. snip I just told someone over in rec.radio.amateur.dx that I'm ready to mail my Grundig back to China with a letter enclosed telling them where they can send it from there. ![]() has been extremely frustrating. All I want to do is turn on my radio, spin the dial until I find something interesting, look it up in my "Passport" book and have that be the end of it. sigh Oh well. I might as well start wishing for world peace. ![]() You might try checking your radio's local oscillator output with another radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune around 1615 kHz. The first part of that went clean over my head. Thanks for trying, though! g FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() I'm still looking for this one. Part of the fun of this, which I didn't include in my rant above, is how I'm sharing this with my kids. I've got a big map on the wall, and we stick pins in the places where broadcasts we've received originated from. But as you all know, you can't always tell where a signal is coming from what with relays and satellites, etc. I'll just persevere. I'm going to enjoy this damned hobby if it kills me. It's a great hobby. Always something going on. dxAce |
#6
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I have a S350 and it's my "sitting on the back porch with a beer on a nice
night radio", but it's no DX machine. The S350 is a single conversion radio and it suffers badly from images as a result. "Honus" wrote in message ... "Frank Dresser" wrote in message ... snip Looks like a spurious response caused by your oscillator's third harmonic and the radio's poor RF selectivity. Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the local oscillator is running at 2070 kHz (1615 + 455). The third harmonic of 2070 kHz is 6210 kHz. With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will be a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455). KAIJ carries Dr. Scott on 5755. snip I just told someone over in rec.radio.amateur.dx that I'm ready to mail my Grundig back to China with a letter enclosed telling them where they can send it from there. ![]() experience has been extremely frustrating. All I want to do is turn on my radio, spin the dial until I find something interesting, look it up in my "Passport" book and have that be the end of it. sigh Oh well. I might as well start wishing for world peace. ![]() You might try checking your radio's local oscillator output with another radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune around 1615 kHz. The first part of that went clean over my head. Thanks for trying, though! g FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna. And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() I'm still looking for this one. Part of the fun of this, which I didn't include in my rant above, is how I'm sharing this with my kids. I've got a big map on the wall, and we stick pins in the places where broadcasts we've received originated from. But as you all know, you can't always tell where a signal is coming from what with relays and satellites, etc. I'll just persevere. I'm going to enjoy this damned hobby if it kills me. Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency again. (I tried reception during the day, but got nothing.) I haven't yet heard anything to indicate who it is, but I'm sure it's Scott. What was he talking about? The Pyramids? Aliens? Demons? Was he yelling at the hired hands again? No, I wasn't that lucky. It's good to have something to look forward to, though. |
#7
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Honus wrote:
I'm going to enjoy this damned hobby if it kills me. Hear, Hear! There should be a Latin translation of that somewhere... mike -- __ __ __ __ __ __ __ __ / /\ / /\ / /\ / /\ / /\ / /\ / /\ / / / /\ \/ /\ \/ /\ \/ / /_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ ..let the cat out to reply.. ©Densa International 'Think tanks cleaned cheap' |
#8
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"Honus" wrote in message . ..
I posted this message over in rec.radio.amateur.dx, but no one seems to have any answers for me. It's perhaps a little off-topic, but since most of the posts in these parts are, it'll fit right in. And at least here I'll get some sort of response. Even if it's political. I'm just going to cut and paste: I'm new to the hobby, so please bear with me. I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the Anguilla, British West Indies 24 hours a day - 7 days a week 690 KHz AM 1610 KHz .........snip..................................... ......................... The DX 350 is a sensitive receiver but it doesn't work too well with a long antenna. The circuits overload and you find images of stations in all sorts of places where they shouldn't be. The first thing to do is to disconnect the long wire antenna and see what kind of reception you get off the whip. Probably the "ghosts" will disappear. Another thing you can do is to find the switch on the right hand side of the radio marked ""SW LPF" and switch it on. This will help remove some of the mysterious signals. If the problem persists disconnect the ground and see if that helps. You may find that you can receive most of the stations you want right off the whip. Also, the "RF Gain" contol should be turned counter-clockwise to the point where the stations just start to drop off. If you wnt to get some of the weaker stations, you will have to experiment and see how much antenna you can use before the overloading starts. You can wind a few turns around the whip or use the antenna input at the back. I think 10 or 20 feet of wire would be plenty. When matched to the right length of antenna, the DX 350 should be fine for your purpose. If you get a bit frustrated at having to fiddle with the antenna, ride the RF gain, and switch the LPF on and off, remember that communications receivers that handle a wide range of signal strengths cost upwards of $1,000.......good listening.....ken.... |
#9
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On Tue, 17 Aug 2004 22:50:48 GMT, "Honus"
wrote: And for rec.radio.shortwave, does anybody know of a URL that explains the process by which SW trasmissions are rebroadcast via satellite? Obviously, I've got more to learn about this. ![]() I'm still looking for this one. Nobody is broadcasting shortwave frequencies from satellites. (There are a few ham satellites with repeater outputs on the 10-meter band, if they haven't died by now.) Gene has a conventional TV channel on satellite, but in addition he and others are using the new technology which is taking the place of shortwave in affluent countries, MPEG broadcasting. Basically this is using the same multiplexing and modulation scheme as DBS but with no encryption, on the medium-power Ku-band satellites rather than the high-power DBS satellites. Just like DBS, you can pack a few video channels and a lot of audio channels onto one transponder. In the United States, you'll find two main types of things broadcast this way: foreign-language programming (Asian channels are particularly popular) and Protestant evangelism. For further information, consult alt.video.satellite.mpeg-dvb. |
#10
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![]() "m II" wrote in message news:4_yUc.20547$jZ5.15839@clgrps13... Honus wrote: I'm going to enjoy this damned hobby if it kills me. Hear, Hear! There should be a Latin translation of that somewhere... I've got the guys over in one of the latin language groups working on it. ![]() |
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