[Elecraft] KPA500 power supply

[donovanf at starpower.net]

U.S. electrical utilities comply with ANSI C84.1-2011 which specifies 
a steady state service voltage of 120/240 volts +/- 5% measured at 
the point (typically the meter) where the electric systems of the 
supplier and the user are connected. 


Excursions of limited extent, frequency and duration to 110-127 
volts are acceptable. Momentary transient under and over voltage 
excursions well outside this range are allowed. 


NEMA -- the National Electrical Manufacturers Association -- 
recommends that all electrical appliances and motors operate at 
120 volts +/- 10% although not necessarily at an optimal condition 
beyond +/- 5% 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Joe Subich, W4TV" <lists at subich.com> 
To: elecraft at mailman.qth.net 
Sent: Thursday, March 29, 2018 1:40:55 PM 
Subject: Re: [Elecraft] KPA500 power supply 


> (not sure why we call it 220, 'cuz i think it's actually 230v) 

Because the original standard was 110/220V ... as power consumption has 
increased and distribution utilities have attempted to reduce losses it 
crept up to 112/224, then 115/230, 117/234 and now runs 120/240 in many 
locations. 

73, 

... Joe, W4TV 


On 3/29/2018 9:19 AM, Chris Hallinan wrote: 
> As others have commented, the amp works just fine on 110v. In my case, 
> every dit and dah resulted in a slight but noticeable dimming of the lights 
> in my shack and an adjoining room. After putting in a dedicated 220V 
> circuit, (not sure why we call it 220, 'cuz i think it's actually 230v) no 
> dimming at all, and no complaints from the better half! ;) 
> 
> 73 de K1AY 
> Chris 
> 
> On Thu, Mar 29, 2018 at 2:17 AM, Dennis Haarsager <haarsager at gmail.com> 
> wrote: 
> 
>> I am ready to order a KPA500 and wonder if anyone out there has regretted 
>> operating one from 115-volt service. 
>> 
>> Thanks and 73, 
>> Dennis, at the moment CT9/N7DH 
>> 
>> Sent from my iPhone 
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