[Boatanchors] One more point 120 vac Variac

[Jim Wilhite]

At the time I measured my voltage output the input was 124 volts.  It is 
a transformer.

Jim/W5JO

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



> Regardless of what the markings are, you need to know the input
> voltage, or just get a $10 Chinese digital AC voltmeter
>
> for example http://www.sureelectronics.net/goods.php?id=483
>
> there are many others.
>
> -pete
>
>
>
>
>
> On Tue, Jun 14, 2011 at 8:42 AM,  <WA5CAB at cs.com> wrote:
>> GR is neither the only nor the largest producer of variable
>> autotransformers. More industrial systems I have seen are/were 
>> equipped with Powerstats,
>> not Variacs. I have four units here. One is GR, three are not. The 
>> dial
>> plates of two read "0-140" and "VOLTS AC". The other two just read 
>> "0-140".
>>
>> In a message dated 6/14/2011 9:28:00 AM Central Daylight Time,
>> 1oldlens1 at ix.netcom.com writes:
>>> ----- Original Message -----
>>> From: "Rob Atkinson" <ranchorobbo at gmail.com>
>>> To: "Dick KF4NS" <kf4nsradio at verizon.net>
>>> Cc: <boatanchors at mailman.qth.net>
>>> Sent: Tuesday, June 14, 2011 6:56 AM
>>> Subject: Re: [Boatanchors] One more point 120 vac Variac
>>>
>>>
>>> >I know I have seen some graded in volts but mostly it is %.
>>> >
>>> >My guess is % is used because then a single round
>>> >graduation plate can
>>> >be made for a number of different models and voltages.
>>> >
>>> >Rob
>>> >K5UJ
>>>
>>> Not according to the General Radio catalogues. The dials
>>> are calibrated in _volts_. There are two scales on most, one
>>> on each side, for the two ranges. For 115V nominal Variacs
>>> the ranges are 0-115 and 0-140V on the overvoltage side. The
>>> range depends on the connections made on the terminals.
>>> Portable Variacs have a terminal board on one side. The
>>> exceptions are stacked arrays which have dials calibrated
>>> from 0 to 10, and, of course, 220V units which have
>>> appropriate voltage calibration.
>>> I looked at several catalogues spanning perhaps a thirty
>>> year period and can find NO Variacs with percentage scales,
>>> although they may have been made.
>>>
>>>
>>> --
>>> Richard Knoppow
>>> Los Angeles
>>> WB6KBL
>>> dickburk at ix.netcom.com
>>>
>>
>> Robert & Susan Downs - Houston
>> wa5cab dot com (Web Store)
>> MVPA 9480
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