[RFI] RFI into Battery monitor

[Gedas]

I know Dave implied it in his reply but just to be clear to ensure you 
do not saturate the ferrite core from high DC current make sure you wrap 
the positive & negative leads of a given pair through whatever core you 
use and keep it (them) very close to the charger.

Gedas, W8BYA

Gallery at http://w8bya.com
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On 5/4/2018 2:51 PM, 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 at 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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>
>