ECH83 @ The National Valve Museum [Datasheet] The ECH83 is a triode heptode frequency changer has the unusually low anode voltage of 12.6 Volts, the voltage of vehicle batteries. This valve was clearly designed for use in such an environment, Mullard describe it as being designed for use as a mixer in hybrid car radios. http://www.r-type.org/exhib/aaa0246.htm |