[Milsurplus] Command Set Transmitter Keying

[Mike Hanz]

jcoward5452 at aol.com wrote:
>  Wouldn't a reverse biased diode across the coil "kill" the back emf?

Absolutely!

It also causes the relay to hang in there forever.... :-)

Just exaggerating for effect, but it does add a *significant* amount to 
the dropout time of any DC relay.  It's a standard practice for spike 
suppression where contact timing isn't an issue, but it's not a good 
idea for a keying relay.

 - Mike