R-113: Repair of the electronic circuit & vernier system

All original resistors had increased their values too much. To correct this problem I connected in parallel with each resistor the necessary resistance to bring the original resistor to its correct value.

Both 0.02 microfarad paper condensers were replaced by new ones. Below you will find some pictures showing the "before and after restoration" (Click on images to enlarge)



Vernier system restoration

The Stewart Warner R-113 converter uses the same vernier system as the 301-A, and develops the same problems: the rubber cylinders become either petrified or too soft due to weathering.

The top cyliner was fixed by applying several layers of teflon tape. To prevent the cylinder from slippering it was tighten to the shaft by means of a green plastic lace.(Click on images to enlarge)



The bottom cylinder was also too soft and it moved sideways. To prevent this I removed the shaft with the cylinder and put two metal disks at both ends of the rubber cylinder. (Click on images to enlarge).



Now the vernier system was operative and I was ready to deal with the power supply.