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@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
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|