I am assuming that a question about the Elecraft BL2 is On-Topic (OT) as opposed to Off-Topic (OT)…
I am planning to use my BL2 to measure the impedance of my antenna+feedline at the point of entry into my balun (DX Engineering) which then feeds coax to my K-Line. The feedline is 450 ohm ladder (window style). The antenna is an 80-meter, 136 feet, antenna up in the air about 50 to 60 feet. I have two antenna analyzers and I will likely use both of them to see the difference. I will connect the 450-ohm feed line to the balanced side and a BNC to UHF adapter for attaching to my antenna analyzer [ (1) MFJ 259B, (2) Autek Research VA1]. Questions: (1) How much difference would I expect in using the balun verses measuring the balanced line directly with my antenna analyzers (actually, I plan to do both but wondering if anyone else has done this with what results). (2) I bought the BL2 for this particular purpose as it is switchable between 1:1 and 4:1 transformations. I wanted to figure out which would be best to use, a 1:1 or a 4:1 balun (DX Engineering and I have one of each). Due to the location of the balun (DX Engineering that is) it is easier for me to do this measurement first before physically replacing the one balun with the other. Right now, I am using a 4:1 balun. A third un-related (to above) question: The BL2 is rated for maximum of 250 watts. What are the bad effects of pushing more than 250 watts through the device, I mean a lot more like double or triple. My guess is that the ferrite transformer will overheat causing possibly run-away thermal non-linear changes to the transforming. What else will likely happen? 73, phil, K7PEH ______________________________________________________________ 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]
