> > In a toy train transformer, which is really a variable transformer (aka > "Variac") the output coils are exposed in part so that a spring brush can > come in contact with more windings as Junior cranks his train to 90 MPH.
I would say that most toy transformers aren't variac-style. I think some of the bigger and older ones like the Lionels may have been, but the non-transistorized ones of the last handful of years, used a variable resistor after the transformer coil (and after the bridge rectifier). Today that resistor has been replaced by a transistor circuit. Years ago I used to repair Troller power packs and some of them developed very bad cases of hum (yes JP, they didn't know the words either), enough to be very loud and annoying. Fortunately, for the customer, Troller would replace the transformers free (and even pay me to do it). regards, ken The poll results are in....... To REPLY to the list, use REPLY ALL, to reply to the sender, use REPLY. I do NOT know if this works on all e-mail software, but it works on some of the most common ones. Change your membership, change your message settings, use our CALENDAR, view shared files or photos, view the list archives, GO TO http://groups.yahoo.com/group/S-Scale/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> 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/
