Machlett ML-80 Kenotron






          26” (65cms) long.  6” (15cms) diameter.


                 Unknown specifications.


                 Dating probably to the late thirties.or early forties.


                 The tube carries no maker’s name or type number, but a highly similar tube, described as a Machlett ML-80 Kenotron is seen in the picture below, reproduced from page 83 of E.R.N.Grigg’s book “The Trail of the Invisible Light”.



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