I've worn a BNC out on a Tek scope once or twice in 35 years... Chuck Hawley [email protected]
Amateur Radio, KE9UW aka Jack, BMW Motorcycles ________________________________________ From: [email protected] [[email protected]] on behalf of Wes Stewart [[email protected]] Sent: Tuesday, September 18, 2018 12:51 PM To: [email protected] Subject: Re: [Elecraft] loss of RX sensitivity It's difficult to argue with Frank's experience and expertise. That said, fools rush in... I own some network analyzers, 1) an N2PK which I built with type N connectors, 2) a DG8SAQ VNWA-3, supplied with SMA connectors and 3) a RigExpert AA-55 Zoom with a SO239. Professionally, I've used analyzers with type N, 3.5mm (beadless SMA) and K connectors. With the exception of the AA-55, which only goes to 55 MHz, all of these can be calibrated with "precision" calibration kits that can cost thousands of dollars. So far, Frank is right, not a BNC in the bunch. But that has changed with the introduction of the DG5MK's FA-VA5, one-port vector analyzer. I am on the reserve list to buy one of these. The thing to note is that it is supplied with a BNC connector. There has been a lot of anguish, heartburn, etc about this on the VNWA Yahoo group but the consensus is that it will be fine and BNC calibration kit has been developed and tested without issue. https://www.youtube.com/watch?v=X8Z7veGV57o There are tens of thousands of BNCs on oscilloscopes and other instruments and I've seldom had an issue with them in 30+ years of lab work. For quick disconnect I also use short jumper cables with BNCs to break the connections between the hardline running to the tower and the cable entrance to the shack during lightning season. Admittedly, I'm only running 500 W. When I can leave them more permanently connected I revert to type N. Wes N7WS ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
