[Amps] Ouch - 23 Ohms ?

[Dan Sawyer]

Ouch. I picked a set of couplers that are apparently not 50 Ohms. They 
appear to be 23 Ohms.

What aspects of the construction would make a coupler 23 Ohms over 50, 
or for that matter anything else? These are 20 db couplers so the 
majority of power is passed straight through. How much impact would this 
have on a 50 Ohm circuit? When I insert one in a 2 meter antenna path 
the effect on SWR appears to be negligible.

Thanks - Dan