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Re: [RFI] RFI into Battery monitor

To: David Eckhardt <davearea51a@gmail.com>
Subject: Re: [RFI] RFI into Battery monitor
From: Mike NA6MB <na6mb.mike@gmail.com>
Date: Fri, 11 May 2018 22:53:04 -0700
List-post: <mailto:rfi@contesting.com>
I think I removed the last of the RFI from my station DC (voltage and current) monitor system...
I added:
1) one clip on toroid to the current sense, voltage sense and ground wire bundle - 2 turns fit in the core. 2) a ring toroid to the power cord of my transceiver (removed the 3 clip on toroids) - 3 turns fit in the ring.

Mike
NA6MB



On 5/4/2018 11:51 AM, David Eckhardt wrote:
Suggest treating every conductor that enters or leaves your charger with a large and appropriate core of ferrite material.  Choose the ferrite for frequencies in the lower HF spectrum.  75 material would be a good choice.  Take several turns through each core.

Dave - WØLEV

On Fri, May 4, 2018 at 2:41 AM, NA6MB Mike <na6mb.mike@gmail.com <mailto:na6mb.mike@gmail.com>> wrote:

    I don’t have much RFI in my shack and it seems like everything is
    working pretty well.

    The one thing I have left to fix is that my DC power system which
    has a power supply that charges the backup battery, the battery
    powers radios and other stuff and has a monitoring system with a
    high current shunt and a volt meter.

    When I transit on 40 and 80 something gets into the battery
    monitor and it goes crazy, flashes the display, etc. When I stop
    the transmission it goes back to normal so it’s not damaging the
    voltmeter.

    What I want to do is to bypass or filter or someway get rid of the
    RFI that’s getting into the current reading shunt and or voltmeter
    of my battery monitoring system.

    If you have you any insight I would appreciate it.

    Thank you,
    Mike
    NA6MB


    Sent from my iPad
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--
*Dave - WØLEV
*
*/Just Let Darwin Work/*

--
Thanks,
Mike
NA6MB

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