Posted: 6/25/2012 5:32:52 PM EDT
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Listening to Saltgrass links on 70m tonight on the way home. There's a good old boy out of Houston who's on the air all the time, and he starts ragchewing with another local GOB. About 10 minutes into their conversation, a transmission of Dueling Banjo's breaks in and completely wipes out their signals. After it stopped, they started up their conversation again, and once again the music started. Of course they got indignant after this occurred 3-4 times and started talking trash about the unknown operator, and eventually, the entire tune was played. Question... how long does it take for someone to locate the source of the transmission? |
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Quoted:
Listening to Saltgrass links on 70m tonight on the way home. There's a good old boy out of Houston who's on the air all the time, and he starts ragchewing with another local GOB. About 10 minutes into their conversation, a transmission of Dueling Banjo's breaks in and completely wipes out their signals. After it stopped, they started up their conversation again, and once again the music started. Of course they got indignant after this occurred 3-4 times and started talking trash about the unknown operator, and eventually, the entire tune was played. Question... how long does it take for someone to locate the source of the transmission? 70M? Good luck....i doubt they'll find them anytime soon. locating the source of an HF transmission is akin to finding a needle in the haystack. Except you KNOW the needle is in the haystack. 70CM? Very do-able. All you need is time, and the yahoo to transmit enough. Call up the club for a foxhunt! |
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Quoted: My error... 70CM. Quoted: Listening to Saltgrass links on 70m tonight on the way home. There's a good old boy out of Houston who's on the air all the time, and he starts ragchewing with another local GOB. About 10 minutes into their conversation, a transmission of Dueling Banjo's breaks in and completely wipes out their signals. After it stopped, they started up their conversation again, and once again the music started. Of course they got indignant after this occurred 3-4 times and started talking trash about the unknown operator, and eventually, the entire tune was played. Question... how long does it take for someone to locate the source of the transmission? 70M? Good luck....i doubt they'll find them anytime soon. locating the source of an HF transmission is akin to finding a needle in the haystack. Except you KNOW the needle is in the haystack. 70CM? Very do-able. All you need is time, and the yahoo to transmit enough. Call up the club for a foxhunt! |
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70cm is like shooting fish in a barrel, DF-wise, especially if the transmission is FM and lasts a while,
a good solid carrier like that makes using a dual-switched antenna (TDOA) DF unit super easy, and gain antennas on 70cm are pretty portable as well. If he's mobile it might be a little harder, but not by much. If you've got 3-4 hams with simple DF equipment, you can probably have the area figured out to a few square miles in a minute, and then pin it down more precisely once you're there within another couple. I have an older dual-antenna unit, but the eham reviews of this unit (same kit company) are pretty positive. |
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You need to figure out which "link" the interference is coming from first off. Then you can send in the drones to pinpoint the interference.
If the system operators can remotely turn on and off the links it will make it easier to locate the source. Of course, this has to be done while the offending signal is on the air. The SYSOPs can turn off links until the interference stops, then you will know which link it is coming in on. Alexandria, LA 444.975 + (downtown 160') 173.8 Anahuac 444.875 + WB5UGT 103.5 Austin 442.450 + WB5UGT 141.3 Bastrop 147.200 + N5ZUA 103.5 Baton Rouge 443.100 + KD5KNZ 107.2 Beaumont 444.700 + W5KWA 107.2 Brenham 443.250 + NE5AL 103.5 Brazoria 147.340 + WB5UGT 103.5 2 Cat Springs 444.075 + WB5UGT 103.5 Clute 444.425 + WB5UGT 103.5 Columbus 442.750 + WB5UGT 141.3 Crockett 444.225 + WB5UGT (450') 203.5 DeRidder, LA 443.250 + WB5UGT (400') 173.8 Galveston 443.275 + KC5FOG 103.5 Hitchcock 147.040 + N5ZUA 100.0 Houston 146.920 - (downtown 744’) 103.5 Houston 443.825 + WB5UGT(785’dtn) 103.5 Katy 444.075 + WB5UGT 103.5 Lafayette, LA 443.150 + (downtown 200') 103.5 LaGrange 146.800 - KG5YH 100.0 Livingston 443.125 + WB5UGT (440') 103.5 Lufkin 444.425+ WB5UGT 203.5 New Waverly 442.725 + WA5AIR (390’) 103.5 Plum Grove 444.175 + WB5UGT (450') 103.5 San Antonio 444.575 + WB5UGT 141.3 The Woodlands 442.700 + WA5AIR (450') 103.5 I hope I made sense...I just woke up.. 
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ETA: The san antonio freq listing posted is now dead. The SWLYNX system is now part of SGLS here. From what another ham told me, they merged here locally in San Antonio, 443.475 being SGLS now here. If I had a radio connected to my IRLP node that could handle the duty cycles that SGLS has I would link up to it permanently, but those guys would burn up my GM300! 
A few of them are IRLP linked too. Channel: 9455 - 2 Nodes. L3066Smithville - Saltgrass Link TXUSA L4341LeesvilleLA USA However the freq is 443.475 for san antonio. I tuned to 444.575 and did not hear anything. Did they instal a new one? I was listening to saltgrass here earlier but I must have been out of the room when the fools started with the music interference. I've heard the same crew yacking away for years on the saltgrass link. They seem like good folks. 
Quoted:
You need to figure out which "link" the interference is coming from first off. Then you can send in the drones to pinpoint the interference. If the system operators can remotely turn on and off the links it will make it easier to locate the source. Of course, this has to be done while the offending signal is on the air. The SYSOPs can turn off links until the interference stops, then you will know which link it is coming in on. Alexandria, LA 444.975 + (downtown 160') 173.8 Anahuac 444.875 + WB5UGT 103.5 Austin 442.450 + WB5UGT 141.3 Bastrop 147.200 + N5ZUA 103.5 Baton Rouge 443.100 + KD5KNZ 107.2 Beaumont 444.700 + W5KWA 107.2 Brenham 443.250 + NE5AL 103.5 Brazoria 147.340 + WB5UGT 103.5 2 Cat Springs 444.075 + WB5UGT 103.5 Clute 444.425 + WB5UGT 103.5 Columbus 442.750 + WB5UGT 141.3 Crockett 444.225 + WB5UGT (450') 203.5 DeRidder, LA 443.250 + WB5UGT (400') 173.8 Galveston 443.275 + KC5FOG 103.5 Hitchcock 147.040 + N5ZUA 100.0 Houston 146.920 - (downtown 744’) 103.5 Houston 443.825 + WB5UGT(785’dtn) 103.5 Katy 444.075 + WB5UGT 103.5 Lafayette, LA 443.150 + (downtown 200') 103.5 LaGrange 146.800 - KG5YH 100.0 Livingston 443.125 + WB5UGT (440') 103.5 Lufkin 444.425+ WB5UGT 203.5 New Waverly 442.725 + WA5AIR (390’) 103.5 Plum Grove 444.175 + WB5UGT (450') 103.5 San Antonio 444.575 + WB5UGT 141.3 The Woodlands 442.700 + WA5AIR (450') 103.5 I hope I made sense...I just woke up.. |
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Quoted:
The banjo guy was on again yesterday afternoon.. Hope they get him. Well that is when you direction find him, and get the local 2 meter EME or sideband guy to bring his kilowatt+ amp and a 7 element portable yagi. Pull up in the driveway, take aim, and key down for about 10 seconds on the repeater output frequency. 
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