I'm in the market for a new water heater. I will keep the A.O. Smith in
consideration.
tnx
Dale, k9vuj
On 27, Oct 2010, at 16:09, dgsvetan@rockwellcollins.com wrote:
> Doc,
>
> I have a high efficiency Rheem furnace, going strong for 10 years. The
> only RFI I get from it is during ignition of the burners ( a burst of
> "machine gun static" for about 2 seconds). The burst is audible on all
> bands 160m thru 6m on any HF or 6m radio. (No antenna is closer than 50
> feet to the house.) The burst is not real loud and it is of short
> duration, so I am willing to live with it. The furnace motors (air
> handler and combustion blower) are both AC induction types. My high
> efficiency A. O. Smith gas-fired water heater causes no RFI at all. It's
> located near the furnace, but I think it uses a hot plate method for
> ignition, rather than a spark. Its combustion blower is also an AC
> induction motor.
>
> As a side note, the church I attend has 8 high efficiency A/C-Heat Pump
> units that were installed early last year. While we don't have any radios
> there, we do have a sound system with lengthy (150 feet, or longer)
> microphone cables. I had some reservations about these new units because
> they all employ inverters with variable speed blowers and compressors. Low
> impedance mic lines do offer a lot of common mode noise rejection, but the
> building is old and I have no idea as to just how good (or not) our
> grounds are at the various power outlets. In any event, whatever noise is
> created by those 8 units is not showing up in the sound system, and I'm
> glad of that.
>
> 73, Dale
> WA9ENA
>
>
>
>
>
> "doc@kd4e.com" <doc@kd4e.com>
> Sent by: rfi-bounces@contesting.com
> 10/27/2010 02:04 PM
> Please respond to
> doc@kd4e.com
>
>
> To
> dalej <dj2001x@comcast.net>
> cc
> RFI List <rfi@contesting.com>
> Subject
> Re: [RFI] RFI from new Hi-efficiency furnace?
>
>
>
>
>
>
> Hey Dale and Mel,
>
> We will be looking at HVAC units soon as well.
>
> I'd be interested in what sort of tests you have done -
> Dale (bands, modes, type of gear) - and what is the proximity
> of the antennas to the HVAC.
>
> Also, do you know where the Carrier equipment is
> currently
> manufactured? (I know it can change from year to year.)
>
>
>> We have a Carrier Infinity and it has the DC fan motor which runs at
>> different speeds for A/C and for just circulation. I have not
>> experienced any noise from it.
>>
>> 73 Dale, k9vuj
>
> --
>
> Thanks! & 73, doc, KD4E
> http://KD4E.com
> Have an http://ultrafidian.com day
> Defend free speech or lose your freedom.
> I don't google I SEARCH! http://ixquick.com
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