Hi Colin,Yes, I thought of a CM choke as well, and tried one (with plenty of inductance to work well down at LF)--no discernible change in the AC hum! But the longwire is all down, supports removed, wire rolled up, so I don't ever plan to try that failed experiment again. :)
73, Steve On 8/22/2016 12:48 PM, coffee_canuck wrote:
Maybe add a common-mode choke to that set up. Colin Newell - CoffeeCrew.com - VA7WWV - Victoria - BCOn Aug 22, 2016, at 12:37 PM, Steve Ratzlaff <ratzlaffsteve@xxxxxxxxx> wrote: I strung a 1100' E/W longwire last week but found it picked up high levels of AC noise from a parallel powerline some short distance away (30-40')and was completely useless for weak signals--I took it down today. It was worth a try as I had no idea how much, if any, a parallel powerline might couple to the longwire. Now I know! I'll eventually try another location that's much farther away from the powerline and hope for better results. Steve
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