Not sure you have anything to do the measurement, but the center pin of a 50 ohm type n male connector should be 0.0640 inches in diameter (this is the last part of the pin before it tapers to a blunted point). A 75 ohm pin will be 0.0353 inches. It's easy to tell if you have one of each, but unless you've seen them before it may not be obvious.
If you can remove the center pin and have a known 50 ohm female jack, insert the pin into the center conductor of the jack. If it goes in easily and seems loose, the pin is a 75 ohm. The pin should require a small amount of force to spread the fingers of the jack. As was mentioned before, don't try this with a 75 ohm jack since you will ruin the jack if you push a 50 ohm pin into it. No problem with a 50 ohm jack since it is too big for the smaller 75 ohm pin. Ken K6MR -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of w2bvh Sent: Saturday, October 14, 2006 8:28 PM To: [email protected] Subject: [Elecraft] 50 vs 75 ohm N-connectors I just picked up some fine looking heavily built male N connectors at a hamfest. Before I mount one onto the antenna end of a cable and send it up 18 feet over my roof I'd like to make sure it's a 50 ohm "N". Does someone know how to tell a 50 ohm from a 75 ohm "N"? Thanks in advance for your help. 73, Lenny W2BVH _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
