Radio Road Which tuner to get and getting the most from it. Thank God, for the radio!

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RE: Sherwood tuner arrives

Posted by Thermionic27609 (A) on April 30, 2009 at 19:44:14

In Reply to: RE: Sherwood tuner arrives posted by Eli Duttman on April 30, 2009 at 18:54:37:

Eli,

Thanks for the alternate MPX recommendation. Perhaps I can build two stand-alone units and compare.

I have read some opinions to the effect that it may actually be better to use an IC to do the stereo MPX decoding than to do it with discrete parts, whether tube or solid state, the reason being that it takes a fairly complex circuit to do it well. I've seen some of the original math on old patents involved with the FM MPX system, and it's over my head. (And I went through third semester calculus in college.)

Tim de Paravicini designed an MPX unit using two tubes and an IC. In the article about it, he said it would have taken 8 tubes to build an equivalent all-hollow state model.

• http://www.hi-fiworld.co.uk/hfw/featureshtml/timdeparadecode   (Open in New Window)

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