[Elecraft] OT: Whole House Generator - Update

[Dave Cole]

I switched to gas, and mu bill went from around 200 bucks a month for 
electric to about 80 in winter...  Also my Honda eu2000i now runs the 
heater.

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 09/09/2017 03:00 PM, Ron D'Eau Claire wrote:
> Perhaps it is saying the obvious, but when considering the power
> requirements of a home determine how it is heated. Here in Oregon, in the
> land served by the Bonneville Hydroelectric dam, a great many homes like
> mine are heated electrically. We have a forced air system that employs 3
> electric "burners" each drawing 60 amps at 240 vac - more than 43 kW for the
> furnace alone. Of course, on startup they draw far more than that for the
> first minute until the coils get hot, so a sequencer brings each "burner" on
> line one at a time over a period of a few minutes. On cold winter mornings
> it's not unusual to see the mains voltage sag from 125 to 118 or less even
> if we don't have the furnace running, thanks to all the other electric
> furnaces in the neighborhood.
> 
> 73, Ron AC7AC
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Brown
> Sent: Saturday, September 9, 2017 2:16 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] OT: Whole House Generator - Update
> 
> On 9/9/2017 10:43 AM, Doug Hensley wrote:
>> I'm was pleased to hear K3, K3S & KX3 owners consistently reporting
> whatever hash their units were producing had no ill effects on their
> Elecraft radios during the period their generator was running.
> 
> It is quite common for generators to produce RF noise that radiates on power
> wiring and is received by nearby antennas. The solutions are 1) bonding the
> frame of the generator to the house ground with short, fat copper and/or 2)
> a serious multi-turn ferrite common mode choke on the cable from the
> generator output, as close to the generator as possible.
> Obviously, proper bonding of all grounds is critical to #1 working.
> 
> Square footage of a home affects the electrical load ONLY if the generator
> must run HVAC an system, and the load of that system is likely to be MUCH
> greater than everything else put together, except a well motor. A larger
> generator is likely to put out more RFI and be more difficult to suppress.
> 
> 73, Jim K9YC
> 
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