[ARC5] TCS Transmitter Tip

[Dennis Monticelli]

Neil,

Not a joke.  I assure you that Scott knows what he talking about.  A rise
in voltage is necessary for rapid release of the energy in the coil's
field, but an uncontrolled high peak can cause problems hence the
motivation for a remedy.  The shunt capacitor, whose value needs to be
determined for the coil in question, is there to blunt the peak to a safe
level.  The loss inherent in the relay coil is sufficient to dampen the
tendency toward ringing.

Dennis AE6C

On Fri, Nov 25, 2016 at 2:03 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:

> On Sat, Nov 26, 2016 at 7:46 AM, Scott Robinson <spr at earthlink.net> wrote:
>
>> Another way to speed up the relay is to put a capacitor across the coil.
>> You chose the cap value to limit the peak voltage to something safe, by
>> measurement. I'd start with 0, 1 uF. Smaller cap = higher voltage = faster
>> opening.
>>
>> I have done this in commercial products fro 30 years; it works fine.
>
>
>
> I'm not sure whether you're labouring under a delusion or trying to be
> funny. The capacitor would slow down the relay.
>
> 73 de Neil ZL1ANM
>
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