On Tue, Apr 1, 2025 at 11:36 AM, W0LEV wrote:
Beware of most YouToob presentations.
You can absolutely trust Alan Wolke W2AEW's videos. He is a Tektronix Field Engineer, I know him personally and knows his stuff 100%.
And, to your original question you must be looking at S11 Smith Chart display to see 50Ohms; S21 magnitude should be 0dB when the thru is connected.
Best regards, Don Brant
Donald S Brant Jr