Black tons
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From: Paul Förster on 20 Dec 2009 08:07 Hi, .... just a small question: What are the black tons on the board labelled FB2, FB3 and FB4? Are those things diodes? From the schematics this definitely becomes not clear. Can someone enlighten me please? -- cul8er Paul paul.foerster(a)gmx.net
From: Peter Schepers on 20 Dec 2009 09:23 In article <7p6lsvFq3nU1(a)mid.individual.net>, Paul F�rster <paul.foerster(a)gmx.net> wrote: >Hi, > >... just a small question: What are the black tons on the board >labelled FB2, FB3 and FB4? Are those things diodes? From the schematics >this definitely becomes not clear. Can someone enlighten me please? FB - Ferrite Bead, used for noise suppression, like a coil. PS
From: Paul Förster on 20 Dec 2009 11:38 Hi Peter, On 2009-12-20 15:23:07 +0100, schepers(a)ist.uwaterloo.ca (Peter Schepers) said: > FB - Ferrite Bead, used for noise suppression, like a coil. .... ah, good. That helps and explains some effect I have had. The effect was that a display connector was connected between the ferrite bead and the RF modulator. The display showed a few distortions, nothing serious and not making the thing unusable but being somewhat annoying after prolonged use. I moved that connection beyond the ferrite bead as one would expect it to be connected and the distortions appear a lot less now. So I take it that the RF modulator side of the video connection, i.e. "before" the ferrite bead, produces some noise which is filtered out this way. At least I *know* now why the image is better and not have to speculate anymore. :-) Thanks very much. :-) -- cul8er Paul paul.foerster(a)gmx.net
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