[mountain man]

confused on schematic, the if can before the 7c6 has 5 wires in it grn,blue,black,red and white. the black wire is center tapped in the secondary side of the transformer but nowhere on the schematic. at present i have connected it to pin 4 on the 7c6 but i do not think this is right. getting 455khz tone all the way to the primary side of the transformer but no further. the 50l6 is not producing anything thru a speaker but i can get something when using signal tracer.any ideas?