Leonard D Salins wrote: >I don't have any specs on doing this procedure (point gap, etc.), I >learned how to fix these things by trial and error
Which is, I think, the ONLY way to "adjust" these vibrator thingies. Leonard's procedure sounds exactly like the tweaking I have had to do on a few of them. BTW, what these vibrators do, specifically, is switch the "hot" lead going to the track back-and-forth between the 7-15V vaiable post and the constant 15V post of your transformer (when the button is pushed, that is. When the button is not pushed, the "hot" track lead rests on the 7-15V post as per normal.) There should also be a very brief interval of "dead time" between make and break points in the vibration cycle when the "hot" lead is on neither one of the transformer terminals. The effect is to introduce harmonics (frequencies above the fundamental 60 cycle AC wave form) that get through the filter capacitor to the speaker. (When the vibrator is at rest, all the speaker "hears" is what little 60 cycle AC leaks through the capacitor which is there to act as a low-cut filter.) The sound waveform is not a nice, neat 400 cycle (Hz) signal. It is a raspy, edgy combination of harmonics (multiples of) the 60 cycle AC oozing from your wall outlet. Kinda interesting, really. Even "nostalgic," one might say. Well, for some of us anyway. :^) Chuck F. S-Trains list sponsor: http://www.americanflyertrains.com All the Flyer you desire...books and accessories too! To UNSUBSCRIBE from this list send a note to [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
