Lou, If you don't want to buy one from Elecraft, you can make up your own. Download the W2 Wattmeter manual and look at the diagram on page 25. 73, Don W3FPR On 3/7/2017 9:51 AM, W0FK wrote: > Looking for a KXSER (RS-232) cable (3.5mm to DB9-F). Please email me with > asking price at lladerman AT earthlink DOT net. >