[Hallicrafters] Re: [Boatanchors]Replacing recttubeswithdiodesquestion

[J Forster]

jeremy-ca wrote:

> [snip]
> > The NTC inrush limiters I use have a fairly high cold resistance which
> > drops quickly as they warm up due to current draw.  The ramp up in voltage
> > can be easily measured.
>
> As I stated, they operate at the zero crossing and provide minimal
> protection. [snip]

NTC (Negative Temperature Coefficient) devices are LINEAR (as long as the
applied waveform is shorter than the thermal time constant of the device.)

http://en.wikipedia.org/wiki/Thermistor

They act as a series resistor and have nothing to do with zero crossings.

-John