I guess my question is, why are you going to all this trouble to control something (frog polarity) yhat the switch already does right out of the box? If your equipment ran through it without shorting out, it was already "DCC-friendly", whatever that means.
If it doesn't, electrically isolating the frog will not resolve any problems. In fact, the unnecessary linkage to make the frog do what it already does could only lead to more problems. If your objective is to bypass the selective control feature of the switch via point contact, which can be unreliable at times, an SPDT switch connected to the closure/frog rails without isolating the frog would be a "fail safe" way to guarantee power whichever way the switch is lined, either via the points, or via the switch points, or both. Bob Nicholson ___________________________________________ --- In [email protected], Edward Sauers <ehsauers1@...> wrote: > > Ed. > > You should have 3 contacts on the switch machine, the common contact connects > to > the frog and the power from the rails (or buss feeding the rails) get > connected > to the other 2 contacts. If you get a short after connecting the rails to the > contact you would need to swap the 2 rail connections. > > Ed Sauers > > > > > ________________________________ > From: Edward Davis <edandhdavis@...> > To: "[email protected]" <[email protected]>; > "[email protected]" > <[email protected]> > Sent: Tue, June 7, 2011 2:17:30 PM > Subject: {S-Scale List} Insulated frog question > >  > Hi All, >  > I have just cut gaps in a Shinohara turnout to improve the electrical > contact > and make it dcc friendly. I have isolated the frog so I'll have proper > contact > when the turnout is thrown either way. I'm using an older twin coil switch > machine with auxiliary contacts. Where do I connect the frog? I've touched > every > place on the switch machine with a wire from the frog but I don't get any > power. > The switch machine works fine. Where do I connect the frog? I'm using a spdt > toggle. I'll be grateful for any help. >  > Ed Davis > Stockton > > [Non-text portions of this message have been removed] > > > > Ed, > > [Non-text portions of this message have been removed] > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
