View Single Post
  #8  
Old 18th September 2019, 06:44 PM
VantheMan VantheMan is offline
Senior Member
 
Join Date: Jul 2007
Location: Canaries
Posts: 268
Default Re: KEL84 Bi-coloured LED

When my E.E. mate rebuilt my OTT Puresound P10 valve phono into 2 boxes he somehow put a delay on the switching on of the full circuit so that the heaters had time to reach their operating temp before the anode (or was it cathode) started in. My led starts yellow but I should wait for it to change to green before placing needle on disc. Something to do with valve life. Maybe someone can explain.
Reply With Quote