DIRECTIONS FOR USING THE TUBE  
 SUPPLEMENT CHART 667-05 WITH 
 THE MASTER CHART


         Please note that the listings of settings in the 667-05 chart will either supersede or supplement all previous charts.  Check the settings for the tube to be tested on the 667-05 chart first.  If a tube type is not listed on this chart, then use the settings for it on the latest preceding chart.  This chart contains some corrections and many newer covered types.  The 667-05 is the latest supplement that I know of.  When this chart is used in conjunction with the master chart it will form a complete and accurate chart of settings, so you still need to use the original master chart.