[ARC5] TCS Transmitter Tip - Snubber

[David Stinson]

----- Original Message ----- 
From: "Dennis DuValll" <w7qho at aol.com>
Subject: Re: [ARC5] TCS Transmitter Tip - Snubber


> The TCS transmitter already includes snubbing circuits made up 
> of R120 and capacitors C128A and 128B.

Agreed, and while I'm not one for arguing with the
design engineers, I make an exception in this case.
I don't believe the installed snubber as effective
as a snubber for the contacts themselves.  Moreover,
R120 is grounded, while the contacts themselves of
course have no Lo-Z path to the grounded end of
R120.  The arc potential is between the contacts;
not the contacts and ground.
Therefore, whatever the actions of the original
snubber, it cannot be as effective as one at the contacts.

Regards,
David S.