Re: quadracs

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jimlux-at-earthlink-dot-net>

Quadracs are quite common... Most cheap light dimmers use them (fewer parts
= lower assembly cost)
(Teccor would be a mfr...)

yes, a diac in series with the gate of the Triac is essentially a quadrac.
(or, a NE-2 neon bulb in series with the gate, etc.)

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, April 03, 2001 10:14 PM
Subject: quadracs


> Original poster: "Mike Wood by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<mike.wood-at-opennw-dot-com>
>
> Hiya
>
> I found an old article that referred to quadracs - but it says that
they're
> tough to find (in 1980-something!) and so far only Digikey have looked
> hopeful.  Sadly I don't need us$25-worth just now so that's not a goer
> either.  The spec describes it as a combined triac/diac package though -
can
> I just find a triac and a diac and bend them to my will?  How do I arrange
> them so they'll behave the same?  Also do they just need to be rated to
the
> same voltage and current as the quadrac would've been, or is it all more
> complicated?
>
> Thanks for any help anyway!
>
> Mike
>
>
>