[Ron Ramirez]

Hi

Please refer to the schematic here.

You mentioned you did not replace the "enclosed" caps...do you mean you did not replace the caps in the rectangular metal can, or you did not replace any of the caps in this or the bakelite blocks?

All of the paper and electrolytic caps must be replaced, even those in the bakelite blocks and the metal can.

Doublecheck your wiring.

Also note that the dual ganged control in the 50 is not the same as used in Models 20, 70 and early 90. The 50 needs one that has 1750 ohm and 5000 ohm sections. If you are using a dual gang control from a 20, 70 or 90, the set will not work as that control has 250 ohm and 5000 ohm sections.