Dave -
Thank you for the answers. Luckily, 144 MHz is my only interest so ferrite
chokes might be helpful. We'll see.
73,
W9IP
-----Original Message-----
From: RFI <rfi-bounces+nlsa=nlsa.com@contesting.com> On Behalf Of Jim Brown
Sent: Wednesday, March 27, 2024 3:02 PM
To: rfi@contesting.com
Subject: Re: [RFI] Large ferrite chokes on power cables
On 3/27/2024 3:15 AM, nlsa@nlsa.com wrote:
> Dear friends,
>
> If I suspect that RFI is coupling to the 200A service entrance that
> feeds my solar panel inverters.
Not surprising, components like this are often poorly designed, ignoring FCC
Rules for RFI. The solution is to call on the supplier to fix that, and the
time to do that is before you sign on the dotted line. Suppliers tend to be
more responsive before they have our money.
> Is it feasible to install a ferrite choke on this big cable?
Yes, but don't expect it to do much below 6M unless you can wind turns.
> Besides the obvious need to be large enough to fit around the cable,
> what other factors need to be taken into consideration? I suppose
> that the 60Hz AC current through the cable imposes come requirements
> on the ferrite core. what are they?
No, the only consideration is mechanical.
73, Jim K9YC
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