Re: SCR coil questions..was Sam's HIGH POWER...

> The diode has outlasted several SCRs. The main thing that has killed 
>is the core still being in saturation.  The SCR barely gets warm during 
>power operation.

Perhaps the cause of SCR failure is di/dt - if the rate of current rise 
is too high then hot spots can appear on the SCR chip leading to failure 
- if the core is saturated the inductance of coil may be significantly 
less than when ' cold'

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