20 Apr
2013
20 Apr
'13
1:45 p.m.
75 ohm BNCs, because they have a thinner dielectric
around the centre
pin of the female. Here's a selection of male and female BNCs from my
junk box for comparison:
http://offog.org/stuff/bncs.jpg
Very nice - illustrates the point well.
However, lots of cheap BNCs from noname companies do not always follow
this rule.
For most of our purposes, using a 50 or 75 Ohm connector really does
not matter. Look at all the rules that were broken when 10base2 was
popular, especially when people added very short little BNC jumpers,
when the Tee was just a little too tight against the back of the
machine. Somehow the stuff still worked fine.
--
Will
