"Thyractors" on the DEC LT33 modified ASR33 Teletype

[Philipp Hachtmann]

Hi,

> I am currently modifying my Teletype ASR33 into a LT33 according to the 
> DEC specifications to work with my PDP-8/L. Does someone know what is a 
> Thyractor (GE 6RS20SP4B4) ? Some kind of voltage clamping device ?.
> How could I make one, using, for instance a pair of thyristors or a pair 
> of zenner diodes ?

Hey, look at the function of the little relay card in the ASR - and 
build something similar. I have two of this modifies ASRs, it's really 
nothing special....

Regards,
Philipp.