Skype is down

Aug 16, 2007 104 Replies

I'm listening to CBC radio from Vancouver as I type this. CBC has about 20 internet radio station available at

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You can get the local news from different cities and regions as well as national news and programs.

I haven't turned on my shortwave receiver in years now. I can get all the news and foreign-language practice I want over my internet connection.

You can find the BBC at:

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Mark Borgerson

There's at least some FM because I used to be able to pick up St. Paul VOR's identifier on my analog FM radio at 108.0. Not very interesting listening to hear nothing but the identifier repeated every few seconds.

I was referring to the nav/com radios which are constrained to the 108-136 MHz frequencies.

I've noticed the same thing with cheap FM radios at other points on the dial. It invariably works out to be indicated at twice the IF below the transmission frequency.

Andrew Smallshaw andrews@sdf.lonestar.org

That's known as image interference. The local oscillator in a superhet can be IF above or below the received frequency. The image is rejected by the TRF portion of the system. FM IF is at

10.8 MHz, while AM IF is usually at 455 kHz (more or less).

TRF means "tuned radio frequency".

Please do not top-post. Your answer belongs after (or intermixed with) the quoted material to which you reply, after snipping all irrelevant material. See the following links: (taming google) (newusers)

That's partially because the demodulator in cheap FM radios is far from ideal and the selectivity of the RF filter up front is usually anywhere from paltry to non-existent.

Regards, Joerg http://www.analogconsultants.com

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