"Thyractors" on the DEC LT33 modified ASR33 Teletype

[Wai-Sun Chia]

On Wed, 23 Mar 2005 12:54:35 -0500, Paul Koning <pkoning at equallogic.com> wrote:

> If it's a voltage clamp, then either back to back zeners, or a MOV
> should work.  MOV might be the better choice since they are explicitly
> designed as protective devices.  Zeners would be ok in the larger
> sizes, but the small ones may be fragile enough that they don't do
> well in this application.
> 

I agree. MOVs are designed to be dirt-easy and robust to boot. If I
were to do it, I'd parallel a couple of 5W zeners BEHIND a suitably
sized MOV just to be on the safe side.

/wai-sun