[1000mp] What is Wrong with SWR Meter?

[Tom Rauch]

> One often overlooked source of "Impedance Bumps" 
> is caused by using the PL-259 / SO-239 family of 
> plugs and barrel connectors to terminate your coax 
> in.
PL-259's are virtually perfect.

You can totally ignore the "bump" caused by SO-239's below a few 
hundred MHz because the "bump" is very short and has a very modest 
SWR.

A typical SO-239 is about 35-40 ohms, and the length of the 1.4:1 or 
less SWR "bump" is about 1/2 inch. That translates to a SWR bump of:

10MHz 1.002:1
100MHz 1.02:1
1000MHz 1.20:1

Unless his rig is running at 450MHz, properly installed connectors of 
any type connectors, including phono plugs like Collins used at HF, 
is negligible. Same with loss. 73, Tom W8JI
W8JI@contesting.com