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VILLAGE 900 (CKMO) VICTORIA TO LEAVE THE AIR ON MARCH 4th

MisterGort said:
Maybe a low powered on 840. MAYBE. The existing 850 in BC and the fact that 860 is a CR -- Canadian Restricted channel. 710 also protects Sacramento area and Los Angeles. 910 has a problem with a double IF problem. 455 Khz times 2 = 910 Khz.
Click to expand...
Huh???? To someone who is just a radio nerd that made no sense. What's on 455 khz and why does this affect 910?
 
AM radios use an "IF" or Intermediate Frequency of 455 Khz in the tuner. When your radio is tuned to 1000 Khz -- the tuner is set to 1000 Khz -- Plus or Minus 455 Khz. FM radios use 10.7 Mhz as an "IF". So 910 Khz has a "heterodyne" or NOISE from the radio itself -- that blocks the real radio signal from being heard. That is one reason that the old KIXI - 910 had very poor coverage and noise.
 
Could this be the reason my BN radio never worked on 98.3? Maybe the tuner in there was just so low quality that it couldn't filter things out, I haven't had this problem on any other radios.
 
bobdavcav said:
Could this be the reason my BN radio never worked on 98.3? Maybe the tuner in there was just so low quality that it couldn't filter things out, I haven't had this problem on any other radios.
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I'm not sure where you are, but 98.3 doesn't work on most other radios here too.....
 
You don't get CKSR on 98.3? Maybe that's a bit too far for you, but even if I was in Chiliwack, the BN radio would probably not get it. Most open frequencies sound like static, but on this radio at this frequency, it is silent.
 
CKSR often has oversplatter from CIOC.rendering it mostly unlistenable. Most stations on the site that CKSR uses come in spotty at best in Bellingham....

In the general Puget Sound area, 98.3 is KING-FM I-SQWAK......
 
Bongwater.....All 6 FM signals from Chilliwack are located on one tower on the north slope of Elk Mountain directly south of Chilliwack. You would get the mountains around Cultus Lake, Glacier, and Maple Falls blocking those signals to Bellingham.
 
Dan said:
Bongwater.....All 6 FM signals from Chilliwack are located on one tower on the north slope of Elk Mountain directly south of Chilliwack. You would get the mountains around Cultus Lake, Glacier, and Maple Falls blocking those signals to Bellingham.
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I pretty much get nothing from there beyond a few ghosty, barely audible signals of CKSR or CBU-FM7 99.9 on the hills (once caught CFUN 107.5)...
 
Bongwater said:
CKSR often has oversplatter from CIOC.rendering it mostly unlistenable. Most stations on the site that CKSR uses come in spotty at best in Bellingham....

In the general Puget Sound area, 98.3 is KING-FM I-SQWAK......
Click to expand...
At least that's what it should be......... I will have to investigate that radio a little more. Another one I didn't understand was all the non-coms had a hiss in the stereo except for KPLU. That radio broke about a year ago, and am now using the IPod anyway. That's a better radio anyway, that's the one I was using when I recieved KDUK.
 
MisterGort, thank you for a great explanation of the IF process. When KIXI was on 910, the sound in the background was referred to as the "KIXI Whistle" and announcers actually joked about it, or so I hear.
 
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
 
...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.
 
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
 
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?
 
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.
 
IndigoCoyote said:
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?
Click to expand...

What about 1210 am? I thought they have a 2 site day and night operation?
 
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.
 
Which solstice? Winter or summer? Summer solstice is worse because it's the day with the fewest amount of darkness.

-crainbebo
 
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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