In message o.uk on Mon, 11
Apr 2011 12:10:59 +0100 (BST)
Dave Liquorice wrote:

On Sun, 10 Apr 2011 13:49:44 +0100, Terry Casey wrote:

A terminator is just a 75 ohm resistor.

But not just any 75 ohm resistor. Many use a spiral track on an
insulating former, nice little inductor... Heaven knows what the
actual impedance will be at UHF frequencies.

Something that it doesn't seem easy to find data on - but there is a graph on
the Vishay data sheet at

http://www.vishay.com/doc?20135

which indicates that reactance versus resistance for a 0.35W 75 ohm carbon film
resistor is virtually unity up to 1GHz!

--

Terry