Re: [RFI] Request for Comment (Rheem RP1748 A/C System)

[Steve Dyer W1SRD via RFI <rfi@contesting.com>]

Does the shielding help prevent RF getting *into* the cable?
With these new 4 wire HVAC control systems I worry about RF getting in 
the system too.
73,
Steve
W1SRD
> On 11/5/2020 2:18 PM, Karin Johnson wrote:
> > One toroid was placed at the Air Handler
> > inside the attic of my home, the other toroid at the Compressor outside
> > unit.  I know, some folks will probably say use type 31. 
> Yes, considerable research has shown that #31 is quite superior for 
> 160M and HF.
>  The type 43 is
> > what I had on hand and four turns provides about 20 dB suppression 
> > with this
> > wiring construction, as measured on my network analyzer.
> > > From some quick preliminary testing, it appears all of the RFI is GONE.
> > No more RFI from the unit while it is running at normal load.
> I strongly suspect that the same chokes placed on existing wiring (if 
> it was long enough to wind the needed turns) would also have solved 
> the problem.
> 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