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Old May 15th 09, 02:24 AM posted to rec.radio.amateur.homebrew
Dave Platt Dave Platt is offline
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Default Re-Coil an FM, MW and SW radio?

In article ,
Bill M wrote:

Also, if I remember correctly, aircraft use AM in the 108-136 MHz range.
So modifying the 88-108 MHz FM portion of the receiver wouldn't work.


Doesn't really matter much since you can slope tune it.


IIRC, slope tuning can be used to allow an AM receiver to demodulate
FM (albeit somewhat crudely).

Does it work in reverse? Can you offset-tune an FM receiver, and get
its discriminator to demodulate an AM carrier-and-sidebands?

Seems to me that this wouldn't necessarily work... the
huge-amounts-of-gain-and-then-clip-the-result architecture of an FM's
IF strip is going to equalize out the amplitude variations in the AM
signal pretty effectively, won't it?

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Dave Platt AE6EO
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