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Skywave · 18th Dec 2010, 8:10 pm

In my experience, aligning a 10.7 MHz IF strip and its accompanying detector by ear is difficult - if you want good results. It sounds as though the FM discriminator is a bit off-centre. There is a method of setting up a discriminator by using only a multimeter, but a sweeping generator + 'scope is the best choice.

OTOH, does the fuzzyness appear on all stations? You might simply have inadequate signal strength.

Al. [Skywave]

18th Dec 2010, 8:10 pm	#3
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: "Fuzzy" FM In my experience, aligning a 10.7 MHz IF strip and its accompanying detector by ear is difficult - if you want good results. It sounds as though the FM discriminator is a bit off-centre. There is a method of setting up a discriminator by using only a multimeter, but a sweeping generator + 'scope is the best choice. OTOH, does the fuzzyness appear on all stations? You might simply have inadequate signal strength. Al. [Skywave]