[Elecraft] RFI issues

[hawley, charles j jr]

I don't know the mx. I get it though, it's worked on switching supplies and I wind multiple turns. They did a great job on a treadmill. A different mix may be better because it seems like a lower frequency. 

Jack BMW Motorcycles
Chuck KE9UW
c-hawley at illinois.edu

Sent from my iPad

> On Feb 21, 2020, at 5:35 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On 2/21/2020 3:08 PM, hawley, charles j jr wrote:
>> I have put ferrite on the line cord which don't affect it.
> 
> Which ferrite? There are dozens of different types. Did you just clamp one on, or did you wind multiple turns through it as shown in these links?
> http://k9yc.com/KillingReceiveNoise.pdf and
> http://k9yc.com/KillingRXNoiseVisalia.pdf
> 
> If you don't use the "right" ferrite and if you don't wind the "right" number of turns for the band(s) where you hear the noise, the ferrite WON'T do anything.
> 
> 73, Jim K9YC
> 
> 
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