Original poster: "miles waldron" <mileswaldron@xxxxxxxxxxx> Dear All,At <http://www.abelian.demon.co.uk/tssp/tcma/>http://www.abelian.demon.co.uk/tssp/tcma/ Paul Nicholson mentions a Terry Fritz schematic that shows an interesting circuit called the "pinger". What is the transformer labeled CT? (center tap?)
Sincerely, Miles