[RFI] Turn off the whole house to locate noise sources?

[Stuart Phillips]

Gary,

The switchers will generate RFI regardless of whether pulling current or not – however, expect the RF signature to change somewhat under load depending on the design of the unit.  My experience is all switchers generate some level of RFI – the real question is whether it affects frequencies on which you are operating and the strength of the RFI.

My antenna/tower is about 300 feet from the house.  When I beam directly at the house, on some bands, the entire noise floor rises a dB or so – plus signals I don’t hear/see emerge out of the noise.  Most I live with – the really bands ones lead to a hunt and destroy mission!

Stu K6TU

On 10/22/17, 12:19 PM, "RFI on behalf of garyk9gs" <rfi-bounces at contesting.com on behalf of garyk9gs at wi.rr.com> wrote:

    
    I have a question regarding the "turn off the whole house" recommendation. 
    Before doing so, do you search all of the ham bands looking for noise, say in conjunction with the P3 set to wide span? Or do you look at the whole spectrum from the AM bcb to 30 mHz?
    I have a pretty quiet location but I still want to eliminate the noise offenders in my own  house.
    And then repeat after the main breaker is turned off?
    I suppose it makes sense to do the low bands during the daytime and the higher bands at night when thrre are fewer real signals?
    One other question regarding switch mode power supplies like cell phone chargers and laptop power supplies.   If the are plugged into the wall but not connected to, say a phone, is that good enough or should they actually be supplying current to a device?
    
    73-Gary K9GS 
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