Re: Type 519 -- Why 125 ohms?


Harvey White
 

IIRC, that's the impedance, or close to it, of twisted pair non shielded cable.

Harvey

On 5/10/2021 9:54 PM, Sean Turner wrote:
Pondering the beast that is sitting in my lab got me thinking, why 125 ohm? Does anyone know of the history of why this was chosen? I haven't been able to find much about this, so insights are appreciated!

Sean




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