I built up this NEMA box and put the analog current and voltage meters in it.
That gave me a good platform to build the peak sensing circuit and alarm.
Since I also have solar bank on the ham equipment, I used the battery to sound
the alarm when either the voltage goes high or low like in a brown out. Of
course that only does good when I am home.........
Mel, K6KBE
From: "Charlie T, K3ICH" <pin...@erols.com>
To: elecraft@mailman.qth.net
Sent: Tuesday, September 5, 2017 11:37 AM
Subject: Re: [Elecraft] Items you think you can depend on
I've bought some little Chicom plug-in Line Voltage monitors that are rated
to run from 80 to 300 VAC for about $5 each through eBay, free shipping/no
tax.
They are completely self-contained with the two prong standard US blade plug
built-in.
The background illumination is blue LED and they're about 1/3 the size of a
pack of Lucky's.
The only problem I've found with them is that after about 5 years of 24/7
use, the background illumination isn't as bright as a new one, but still
perfectly readable.
73, Charlie k3ICH
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Rhodes
Sent: Tuesday, September 05, 2017 2:12 PM
To: Elecraft <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] Items you think you can depend on
So what are people using to monitor their 120/240 mains? Just curious but
wondering if this is something I should be doing.
Mike / W8DN
On 9/4/2017 1:32 PM, Mel Farrer via Elecraft wrote:
> Funny you posted this.
> I monitor BOTH sides of the 110/220 VAC service and have alarms set to
trigger either line >125 or >250 VAC. Being in the country THINGS happen.
> Always expect the unusual.
> Mel, K6KBE
>
>
> From: David Robertson <kd1na...@gmail.com>
> To: Elecraft <elecraft@mailman.qth.net>
> Sent: Monday, September 4, 2017 9:39 AM
> Subject: [Elecraft] Items you think you can depend on
>
> Everyone,
>
> Over time we can grow complacent on many service items such as
> electrical power, water and other services over time. Well that can be
> concerning as many hidden changes can result in damage to your home and
equipment.
>
> Late late night I came in to my den and was closing down my ham
> station when I notice my fault light on my KPA500 linear was on. I
> powered it down and retired for the evening. This morning I powered up
> the linear (KPA500) and at once I got a fault light and had a high
> voltage alert. I powered down the linear and checked my input line
> voltage. It was 137 volts RMS! To be sure it wasn't my imagination I
> rechecked the voltage with a different meter with the same result. In
> checking the 220 volt outlet I measured 274 volts! My linear is set up
> for 220 volts operation and it was getting over
> 90 volts HV.
>
> I alerted the neighbors and cut the main breaker to the house. I then
> called the power company's service number and reported the problem. A
> short time later they called me back and reported that a regulator in
> the local sub station had "Stuck" and was reset. In rechecking my line
> voltage it was
> 118 volts on the low side and 236 volts on the high side.
>
> In the 12 years we have been at this qth we found that our town's
> locally run power company has been very reliable but this experience
> showed me that it is not a bad idea to check your line voltage every once
in a while.
> 73
>
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