KRLD Interference - West Fort Worth

[dfwrunner]

Month or two ago, I reported itnerference with KRLD with another signal at about 1/3 volume, in west Fort Worth near 820/Las Vegas Trail area. It turns out to be WBAP (or a station with identical programming, but i did wait for commercial set that I thought was local, although not ID). Possibly power line interference amplifying/overdriving?

 

[Jay Walker]

Month or two ago, I reported itnerference with KRLD with another signal at about 1/3 volume, in west Fort Worth near 820/Las Vegas Trail area. It turns out to be WBAP (or a station with identical programming, but i did wait for commercial set that I thought was local, although not ID). Possibly power line interference amplifying/overdriving?

I think you nailed the problem referring to power line "amplification". Your receiver may be getting, to use an old term "swamped" with RF overload.

Over by the old Carpenter Freeway studios at Regal and Carpenter as you pass near and under the power lines from the substation located in the medium on Regal Row, your AM receiver will overload with 1190 during the daytime hours... on any AM dial position.

Another note:
When 620 first signed on the air from Wylie, I noticed an interesting "mixing" issue in Los Colinas near the high-tension power lines as well. You could tune into 570, 620, and 1190 and hear all three to a varying degree at once on each dial position 620, 570, 1190....

When you do the math you find that theses frequencies are the sum and difference of each i.e. 570+620 = 1190... 1190-620=570... 1190-570=620 etc. etc.

Strange how RF will play once it is in the "wild"...

In the country where I live a mile west of me, there is a un-used (for now) 750KV power line that I will sometimes park under at night on my way home after dark. The proximity of the power lines allows me to use the lines as super long wire MW antenna. The power-line runs from the Anna Switch station down towards the shut down power plant near 289. It is a long continuous run of wire possibly 20 miles or more.

The AM signal increase on the car AM radio while parked under the power line is incredible. DX jumps out of the background and as you move away from the power lines the signals drop back into the receiver noise floor. I will hate it when they "light" those lines up ;D

Jay Walker

 

[Mediafrog+]

In the country where I live a mile west of me, there is a un-used (for now) 750KV power line that I will sometimes park under at night on my way home after dark. The proximity of the power lines allows me to use the lines as super long wire MW antenna. The power-line runs from the Anna Switch station down towards the shut down power plant near 289. It is a long continuous run of wire possibly 20 miles or more.

The AM signal increase on the car AM radio while parked under the power line is incredible. DX jumps out of the background and as you move away from the power lines the signals drop back into the receiver noise floor. I will hate it when they "light" those lines up ;D

I've heard stories of AM DX'ers parking on train tracks and getting similar results from what could be hundreds of miles of rail. Of course you have to also listen for train horns. ;D

 

[dfwrunner]

Month or two ago, I reported itnerference with KRLD with another signal at about 1/3 volume, in west Fort Worth near 820/Las Vegas Trail area. It turns out to be WBAP (or a station with identical programming, but i did wait for commercial set that I thought was local, although not ID). Possibly power line interference amplifying/overdriving?

I think you nailed the problem referring to power line "amplification". Your receiver may be getting, to use an old term "swamped" with RF overload.

Over by the old Carpenter Freeway studios at Regal and Carpenter as you pass near and under the power lines from the substation located in the medium on Regal Row, your AM receiver will overload with 1190 during the daytime hours... on any AM dial position.

Another note:
When 620 first signed on the air from Wylie, I noticed an interesting "mixing" issue in Los Colinas near the high-tension power lines as well. You could tune into 570, 620, and 1190 and hear all three to a varying degree at once on each dial position 620, 570, 1190....

When you do the math you find that theses frequencies are the sum and difference of each i.e. 570+620 = 1190... 1190-620=570... 1190-570=620 etc. etc.

Strange how RF will play once it is in the "wild"...

In the country where I live a mile west of me, there is a un-used (for now) 750KV power line that I will sometimes park under at night on my way home after dark. The proximity of the power lines allows me to use the lines as super long wire MW antenna. The power-line runs from the Anna Switch station down towards the shut down power plant near 289. It is a long continuous run of wire possibly 20 miles or more.

The AM signal increase on the car AM radio while parked under the power line is incredible. DX jumps out of the background and as you move away from the power lines the signals drop back into the receiver noise floor. I will hate it when they "light" those lines up ;D

Jay Walker

Yes, the reason i did not think overload originally is because it only occurs on 1080, no other frequency.

 

[317C50KW]

Jay, what you have there is the ultimate Beverage antenna. Wouldn't it be fun to figure out a way to couple one of those Perseus software receivers to that!

 

[Jay Walker]

Jay, what you have there is the ultimate Beverage antenna. Wouldn't it be fun to figure out a way to couple one of those Perseus software receivers to that!

Oh yeah ;D

I am lucky living in the "sticks" in that I can get away with "LONG" wire antennas, but beverages are out of the question even out here. The biggest horizontal loop I can put up runs about 600 feet total at 35 feet. Great for 160m.

Those guys on the west coast that run MW DX-expeditions with portable rohmbics and beverages I truly envy

One of the great forums on the board is the DX forum, lots of "PROS" that make my meager efforts look LAME :

Jay Walker