Same PS here, but a RigRunner 4005 in between PS and K3. RX 13.5V @ 1.26A TX (100W CW) 12.0V @ 17A This yields a resistance of 95mOhms which I consider ok. 73, Markus HB9BRJ -- View this message in context: http://elecraft.365791.n2.nabble.com/normal-K3-voltage-drop-on-TX-tp7606504p7606507.html Sent from the Elecraft mailing list archive at Nabble.com.