Chuck Harris wrote:
Greg Broburg wrote:
receivers used 75 ohmantenna
<http://en.wikipedia.org/wiki/Antenna_%28radio%29>inputs, so they
often used 75 ohm BNC connectors.
I had remembered that it was a 75 ohm that would damage a
50 ohm socket. This article states that a 50 ohm would
damage a 75 ohm socket.
Greg
Sadly, you remembered incorrectly. Both 75 ohm, and 50 ohm
BNC parts use the same center pin assemblies. The only
difference is the 75 ohm part has the teflon shroud removed
from around the female pin. They mate in all combinations
without any risk of damage.
Not necessarily true, BNCs intended for use with RG59 cable with either
a 0.7mm diameter pin or a 0.9mm diameter pin are readily available.
Whilst one of these may now be non standard they are nevertheless they
are still available from Chinese manufacturers at least.
The N style connector is a different story, however. It is
a higher performance connector, and as a result they needed
to make the center conductor of a 75 ohm connector smaller
in diameter all the way through, so the 75 ohm center male
pin is slender, as is the 75 ohm center female pin. If you
jam a thicker 50 ohm center pin into the slender 75 ohm
female pin, it will bend the socket leafs out and probably
break it.
-Chuck Harris
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