Re: Topband: How to Measure Beverage Common Mode Noise

2012-07-24 Thread Tom W8JI
> Wayne is using a DX Engineering bi-directional system. Unless DXE changed > to ununs without telling anyone, he has little to worry about there. ;-) Yes. Cable grounds are isolated from signal grounds. That unit uses primary-secondary isolation transformers. __

Re: Topband: How to Measure Beverage Common Mode Noise

2012-07-24 Thread Mike Waters
Wayne is using a DX Engineering bi-directional system. Unless DXE changed to ununs without telling anyone, he has little to worry about there. ;-) 73, Mike www.w0btu.com On Tue, Jul 24, 2012 at 1:19 PM, Tom W8JI wrote: > Most common issues, other than defective connectors or shield connections,

Re: Topband: How to Measure Beverage Common Mode Noise

2012-07-24 Thread Tom W8JI
> I have run about 400 ft of F6-type flooded coax from my shack to one end > of > my Beverage antenna. My question is: do I need to install a feedline > current choke about 20 feet from the end of the Beverage antenna (the > current choke would have its own separate ground. While a dummy load te

Re: Topband: How to Measure Beverage Common Mode Noise

2012-07-24 Thread Mike Waters
Wayne, What is more important than a little weak noise is common-mode signal. Why don't you also test to see how well you can hear any AM broadcast stations with the coax terminated? Please also tell us more about your Beverage, especially how you are feeding it (transformer, etc.) FWIW, I don't