[Hallicrafters] Re: [Boatanchors] Replacingrecttubeswithdiodesquestion

[Jim Wilhite]

Even the 866 mercury vapor rectifier only required 15 seconds of heater 
voltage before applying anode voltages.

Jim/W5JO




> Most RF amps apply all voltages at the same time no matter what type 
> of filament.
> The difference is that plate current cannot be drawn until the warm up 
> delay circuit has operated.
>
> Manufacturers specs on directly heated filaments as used in ham amps 
> state that only a "few second" delay is required before drawing full 
> plate current.
>
> Military and civilian mobile and aircraft equipment ran off dynamotors 
> and SS power supplies. Instant B+.
>
> Its about time to put myths to rest once and for all; its really 
> getting old.