[AMPS] Stability of Carbon Resistors

[N6BUU@aol.com]

colin: on the same note, i have a bench ps i built in 1957  lv plus hv plus 
var. outputs well the xformer went out so in replacing it i checked some of 
the carbon resistors in the var. voltage circuit.  see below

27 k 2w = 11.86 k

20 k 1w =11.7k

12k 1w =22.7k

330k 1w =535 k

2 parallel 470k 1w =442 k

   a 270 ohm 1w of the same age (1957)  was still 270

   a 470k 1/2 w  was now 496 k
   
 bear in mind the ps is not on all the time. just now and then for testing 
and the resistors were run a rated dissp.  or in most cases less.

                                                      regards   hank
                                                                       

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