[RFI] Fixed my S9 furnace RFI

[Edward McCann]

Sorry .
Fat fingers .

What do I do ?
Forget the fourth wire  ?

73
AG6CX 

Sent from my iPhone

> On Mar 22, 2014, at 9:45 PM, Edward McCann <edwmccann at yahoo.com> wrote:
> 
> So I make three twisted pairs with the drill.
> I have four wires .
> Do I need four twisted pairs?
> Or what ?
> Forget th
> 
> 
> Sent from my iPhone
> 
>>> On Mar 22, 2014, at 6:18 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
>>> 
>>> On 3/22/2014 4:30 PM, ac2ev wrote:
>>> Well it turns out the simplest solution was the best. I
>>> Replaced the four wires that went from the controller board to the motor with a single 4-conductor shielded wire.
>> 
>> Thanks for the report, Don. Another simple solution that would have worked is to use three twisted pairs, one for each phase. It's easy to make twisted pair by cutting two conductors a bit longer than you need length, clamping one end of both down to a nail or bench vise, sticking the two conductors in a drill, and running the drill a while at low speed.
>> 
>> Few people realize that twisting is as effective as shielding up to pretty high frequencies, and far superior to shielding at low frequencies (audio).
>> 
>> 73, Jim K9YC
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