[ARC5] TCS Transmitter Tip

[MICHAEL ST ANGELO]

Neil,


I don't know his application but we used to place a capacitor across the coil to shunt the inductive spike when it denergized. It probably slowed down relay energize time because the capacitor had to change but we did not notice much of a change in turn-on times because the value was low.


I remember another circuit where a capacitor was changed to high higher voltage than the normal relay energize voltage. The charged capacitor was connected to the relay coli via a transistor which sped up the turn-on time.


Mike

 

> On November 25, 2016 at 10:19 PM "AKLDGUY ." <neilb0627 at gmail.com> wrote:
> 
>     On Sat, Nov 26, 2016 at 11:39 AM, Michael Hanz <aaf-radio-1 at aafradio.org mailto:aaf-radio-1 at aafradio.org > wrote:
> 
>         > >         I took Scott's meaning as suggesting a way to speed up the relay as compared with using a solid state diode.  At least that's the way I understood it, given Scott's extensive experience.  Sometimes it takes some parsing of the English language when we write.
> > 
> >     > 
>     He didn't put that qualification on what he wrote.
>     What he said was that a capacitor across the relay coil speeds up its operation.
> 
>     73 de Neil ZL1ANM
> 
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