by Eeyore <rabbitsfriendsandrelations@[EMAIL PROTECTED]
>
Apr 22, 2008 at 12:38 PM
Iain Churches wrote:
> "Eeyore" <rabbitsfriendsandrelations@[EMAIL PROTECTED]
> wrote
>
> > What's the alleged advantage of limiting heater current ?
>
> Longevity
The simplest method would be a series resistor that gets swiched out by
a time-delayed relay. Any semiconductor based method will be complicated
if it has to cope with ac heaters for sure.
There's also the problem of having to produce a different voltage to
start with that's not compatible with existing transformer heater
secondaries.
Graham
