[AMRadio] 220 vac line

Tue Jul 26 17:51:28 EDT 2011

I guess this subject is why all of my commercial/ham radio gear are power though a SOLA constant voltage transformer.  

Mel, K6KBE

________________________________
From: BILL GUYGER <bguyger at sbcglobal.net>
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Tuesday, July 26, 2011 2:36 PM
Subject: Re: [AMRadio] 220 vac line

The power companies will sometime tap the transformers up a bit to compensate 
for voltage drop in times of high load. Alternately there are regulators on the 
high voltage primary feeders that look like large pole pigs which are basically 
autotransformers with some rudimentary logic so that they can keep the line with 
in +/- so many percent. You can tell them by the large guage like device on the 
side that indicates where they are set at the moment and the limits they have 
been at. Your elevated line voltage is not THAT rare but not perfect 
either................. but then again what is now days?

Bill AD5OL

________________________________
From: rbethman <rbethman at comcast.net>
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Tue, July 26, 2011 9:30:24 AM
Subject: Re: [AMRadio] 220 vac line

Believe me - I've used every type of meter, to include one Weston direct 
reading panel meter, a TS-505D/U, a brand new Digital MM - NON Harbor 
Freight, and oscilloscope!

We've had this issue for almost as long as I've lived here for the last 
23 years.  Everything in this part of the city is underground.

ALL the utilities are their own quirky selves!

I put a pressure gauge on the little goose neck that you put the shower 
head on.  I'm in a split level Foyer type construction.  The shower head 
I chose is the highest in the house. I got 130PSI.

So immediately put in a pressure reducing valve in the main line from 
the street.

This city of less than 160,000 has expanded a LOT since I moved here 
after retiring from Uncle Sam's Employ.

They have been getting around the "issues" by pushing Voltage, and water 
pressure, in lieu of upgrades to account for the heavier use!

So when I tell you the voltage, please don't take me for 
"intellectually" challenged.  I'm one whom worked Power Production and 
Distribution while in Uncle Sam's Employ.  To include a very intense 
course on Nuclear Power.  The have even board certified us.

It is what it reads.

Bob - N0DGN

On 7/25/2011 9:25 PM, Jim Wilhite wrote:
> It could also be test meters that are a bit off because of environmental
> conditions.  I assume the meter used to check the voltages have had
> calibration checked.  If not they could be off 2-5% one way or another.
> Should it be high 2% would be 2.5 volts.
>
> Just some random thoughts.
>
> Jim/W5JO
>
>
> ----- Original Message -----
>
>
>
>> The 127 VAC is unquestionably high. Particularly reading that at the
>> convenience outlets (the point of utilization). You say 127 is normal
>> for
>> your location? Perhaps so, I don't know how long you have known it was
>> that
>> high. But what could be the situation is a substation or down line
>> voltage
>> regular could have been stuck in the full "raise" position then gone
>> undetected for weeks or months. Finally the electric utility became
>> aware of
>> it and changed it out (or replaced the control panel) and now it is
>> regulating at 126.6.
>>
>> I say all this because I've experienced it numerous times (I work for
>> a
>> Cooperative electric utility) when a regulator would fail either in
>> the full
>> "lower" or full "raise" mode.
>>
>> There are so many things it could be -- Even air conditioning load on
>> the
>> distribution circuit. But that's what a voltage regulator is supposed
>> to do
>> -- maintain roughly the same voltage set point as the load varies.
>>
>> Good luck!
>>
>> Mark
>> KA4CID
>>
>>
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