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Why Did the Cable Industry Choose 75 Ohms? | Technician-Level Deep Dive

Join Brady Volpe and Ron Hranac as they take a technician-level look at one of the most fundamental design decisions in cable network history:

Why 75-ohm coaxial cable?

From the earliest days of cable television to modern DOCSIS broadband networks, the industry has standardized on 75-ohm characteristic impedance for outside plant and subscriber drops. But why 75 ohms — especially when 50-ohm cable was also widely available?

In this livestream, Brady and Ron break down:

What characteristic impedance really means
The physics behind coaxial cable design
The tradeoffs between 50 ohms and 75 ohms
Power handling vs. signal loss considerations
The historical and engineering reasons 75 ohms became the standard

Whether you're a field technician, network engineer, or broadband professional, this session delivers practical insight with real technical depth.

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About Ron Hranac

Ron Hranac is a 50-year veteran of the cable industry, having worked for both operators and vendors. He is an SCTE Fellow, co-founder and Assistant Board Member of the Rocky Mountain Chapter, and was inducted into the SCTE Hall of Fame in 2010.

He is a recipient of:

The SCTE Chairman’s Award
SCTE Member of the Year
Excellence in Standards Award (Cable-Tec Expo 2016)
European Society for Broadband Professionals’ 2016 Tom Hall Award
2017 David Hall Award for Best Presentation
Ron has published hundreds of technical articles and papers and has spoken at conferences and seminars worldwide.

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