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Old 24th May 2017, 7:09 pm   #30
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 3,876
Default Re: Avantic BM611 Stereo Decoder

Made the changes and have it on headphones. It very readily locks to the 19kHz pilot tone. Separation seems very good although I have no means of measuring it. There is a very slight tendency for sibilance on some pop music tracks appearing in the extremes of the channels. Some hiss is evident on weaker stereo stations but it seems far better than previous receivers I have owned.

There is quite a wide tuning range where the signal largely remains in tune and I do wonder if the extra IF bandwidth is really a benefit or if it causes problem with close-by channels. I suspect narrowing the bandwidth will mostly impact stereo reception on distant stations. I will have one more go at the IF alignment but will try reducing the IF filter capacitor first.
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