[Milsurplus] A relay transient suppression circuit.....?

[mstangelo at comcast.net]

I can't recall. I do remember had to do with the RC time constant so symbol rate was included.

Mike N2MS 
----- Original Message -----
From: Hubert Miller <kargo_cult at msn.com>
To: tetrode at googlegroups.com, 'Milsurplus' <milsurplus at mailman.qth.net>
Sent: Tue, 23 Feb 2016 17:54:35 -0000 (UTC)
Subject: Re: [Milsurplus] A relay transient suppression circuit.....?

What were the operating conditions the nomograph wanted for input to determine the snubber components?

-Hue

 

-----Original Message-----
Back on the days of 50 baud telex we did keying on the 120 volt 60 millamp loops with mechanical relays or transistor keying circuits. We had an RC snubber network across each keying device. They were so pervasive that RC snubber networks were packaged in a form similar to a radial mylar capacitor.

 

I used to have a nomograph to calculate the values. I think I still have some of those snubber devices at home.

 

Mike N2MS