[Elecraft] OT: Maytag Bravos RFI

[Karl Marderian]

N6XVT/Karl,
  No need for you to bring your K3. Just bring your portable shortwave  
reciever. I think ever Ham should own one. It is so great for hunting  
down interfearance  of all kinds.
    73 N6XVT
Sent from my iPhone

On Sep 24, 2009, at 9:51 AM, W0SD Ed Gray <w0sd at triotel.net> wrote:

> I would consider this a whole lot less OT than a lot of things I  
> read. I found it very valuable. There seems to be a site for nearly  
> everything on the internet anymore.  A valuable site would be one  
> that hams would participate in and list items that are clean and  
> don't interfere with the radio spectrum.  The switching supplies  
> seem to be a major culprit and it is just going to get worse.  Even  
> those that meet the FCC Part 15 Class B standards can be a real  
> problem with our amateur equipment.  In roughly the last year I have  
> had switching power supply noise from my new computer which made  
> DXing on the low bands impossible until I solved with filtering on  
> the AC line.  I had router noise across all the bands which made  
> many, many frequenies un-useable some of which were places I operate  
> a lot which I could not anymore.  Fortunately I pretty well cured  
> this by slowing the speed. Both of those answers came from this  
> reflector so I would not call help permitting me to use my K3's OT.  
> My latest problem which I have not been able to solve is 24 khz  
> switching noise from my Outback MPPT solar controller.  The  
> harmonics from it make it all the way up to two meters. It is S-9+15  
> db on 160M.
>
> This switching noise is a tough one as IMHO it should be cured at  
> the source rather than the output where instead of stopping the  
> switching frequency you have the whole spectrum of interference to  
> deal with.  Of course if you start modifying internally you are  
> going to void the warranty.
>
> At this point based on my last years experience before I buy  
> anything different I am going to do my very best to try and find out  
> about radio noise and if I can not then be sure I can return it  
> without a penalty. Where possible one may have to bring a K3 with a  
> gel battery to the store and check things out. The thing is there  
> are a lot of things now that are noise sources that I for one would  
> not expect as almost everything is going to switching supplies.
>
> Ed W0SD
>
>
>
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