Stewart-Warner 301-A shortwave converter restoration
Cabinet restoration & mechanical repairs
Author: Edgardo Castro Bruse
Having restored a 738 Silver Marshall Short Wave Converter from ground up, and after enjoying shortwave listening with it, I decided to venture into the world of the shortwave converters. Some time, in October of 2007, I bought a Stewart-Warner 301-A shortwave converter that looked like the perfect subject for restoration. The converter looked like shown in photos: (Click images to enlarge)
Finally I polished the cabinet with very fine sand paper and applied tint with a soft cloth. Process is shown below. (Click images to enlarge)
The first problem was that the vernier system did not work, because the rubber cylinders that move the large toothed wheels were petrified and cracked.
To remedy this situation I disassembled completely the mechanism, and applied plenty of teflon tape to both rubber cylinders. Then when I tested the mechanism the large toothed wheels made the appropiate grooves on their respective teflon covered cylinder.
The repair is holding well untill now Jan 2010.
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