Goldilocks94941
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« Reply #30 on: February 21, 2012, 10:46:08 AM » |
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Where I grew up in the midwest, there was a 500 watt station on AM 900 about 30 miles away, directionalized toward where I lived. Their signal actually got out a good 80 miles or more, but there was that heterodyne ringing sound you mention on it, regardless of which radio I used. That station has since gone dark and replaced by a high wattage station about 50 miles away on 910. I'm not back there often enough to want to listen to it when I'm in town, so I'm not sure if it suffers from that sound, or if it was just the station on 900 that had it.
I now live a block from the transmitter for Am 630 KCIS, and get an annoyingly loud heterodyne-type noise under AM1090 at home. WHich I do listen to, but have to lower the
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Goldilocks94941
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« Reply #31 on: February 21, 2012, 10:50:53 AM » |
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...RF gain knob to listen. (Sorry, message got sent before I finished typing.)
Is there a logical reason AM 630 would cause a whistle on AM 1090? The noise seems less pronounced when both stations go to their night wattage/pattern, so I'm suspecting it is a result of the nearby KCIS transmitter, not the wiring in my house, that's causing it. I'm listening on an old Panasonic 8-band portable (model RF 2200) which has several tricks to improve AM reception, tho' the shortwave doesn't seem to be working so well on it anymore.
Thank goodness for old analog radio tuners, I guess, to help dial around the high pitched tones.
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DJ Alan
DJ Alan
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101.9 'Spunk FM' Seattle - SpunkFM.com
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« Reply #32 on: February 21, 2012, 12:48:17 PM » |
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Since a few have reported problems with undesirable 'wistles' on older radios....
This can be caused by capacitors in the radio going bad. Sure, other parts can go 'south' too but capacitors can still be functional enough to allow the radio to work, but not work well. Capacitors that are 'buldging out' at the top, or leaking a brown fluid at the top or bottom should be replaced. Easy to do if you are handy with a soldering iron.
BTW... Bad caps on power circuit boards are the main reason Flat Panel TV's and monitors fail. Usually repair shops want to replace the entire power circuit board which are too often 'no longer in production'. Replacing the caps can save a Monitor/TV that you thought may be headed to the recycling center (or to the trash- for those that don't give a hoot).
DJ Alan
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101.9 'Spunk FM' Seattle - SpunkFM.com & SpunkFM.com/mobile.html
It doesn't take a genius to recognize the difference between chicken shit and chicken salad!
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IndigoCoyote
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« Reply #33 on: February 22, 2012, 11:04:08 PM » |
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Goldilocks-
The day transmitter and the night transmitter are about 12? miles from each other for AM630. If you live near 205th and Aurora (in Shoreline) you live near the day transmitter- if you live in a field east of Mill Creek (rural Snohomish County) you are near the night transmitter. So it's not a shock that the whining sound changes day to night.
To my knowledge there are only two AMs in this area where the patterns are on different properties. The other is 1250- Harbor Island days and Kirkland at night. Are there others, gang?
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MisterGort
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« Reply #34 on: February 23, 2012, 02:56:41 PM » |
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98.5 -- ans sometimes 98.3 and 98.7 have an "IF" problem with TV channel 6. 98.5 minus 10.7 Mhz "IF" equals -- 87.8 Mhz - TV channel 6 audio.
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e-dawg
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« Reply #35 on: February 23, 2012, 03:30:44 PM » |
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Goldilocks-
The day transmitter and the night transmitter are about 12? miles from each other for AM630. If you live near 205th and Aurora (in Shoreline) you live near the day transmitter- if you live in a field east of Mill Creek (rural Snohomish County) you are near the night transmitter. So it's not a shock that the whining sound changes day to night.
To my knowledge there are only two AMs in this area where the patterns are on different properties. The other is 1250- Harbor Island days and Kirkland at night. Are there others, gang?
What about 1210 am? I thought they have a 2 site day and night operation? |
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IndigoCoyote
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« Reply #36 on: February 23, 2012, 10:15:16 PM » |
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Forgot all about that one. Thanks!
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bobdavcav
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« Reply #37 on: February 24, 2012, 05:02:07 PM » |
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Since this thread has drifted to am reception, I did also want to point out that sometimes, usually around the solstice, am reception is degraded, I noticed a slight buzzing on KOMO, and it was worse on KVI and KIRO. KKDZ 1250 was so bad you couldn't tell there was even a station there.
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crainbebo
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« Reply #38 on: February 24, 2012, 05:23:53 PM » |
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Which solstice? Winter or summer? Summer solstice is worse because it's the day with the fewest amount of darkness.
-crainbebo
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477 AM stations, 214 FMs....That's a DXer!
FM, AM and SW DXer of Monroe, WA! God Bless America!
E-skip season has sprung!
Last New FM Log: 88.9 KPLK Sedro-Wooley, WA; 5/11/13.
Last New AM Log: 1360 KFIV Modesto, CA; 4/5/13.
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bobdavcav
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« Reply #39 on: February 24, 2012, 05:32:25 PM » |
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I will have to investigate around Summer. It happened a few days around the Winter solstice last year with KKDZ and for the last 2 years on KOMO. It happened in August with KOMO too, didn't check to see if 1250 was audible then. KKXA is well-engineered, it doesn't do this. The only problem I have with it is the classic am squeak that it gets at night.
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