Re: [AMRadio] Variac hook up

[Vince Werber]

hi...

The variacs I have used (Powerstat) were set up like this;


  2 ---)
   )
   )
  4 ---)
   )
   )
   ) <--- 3
   )
   )
   )
  1

But be sure you do the ohmeter tests and make sure you know where the
'variable' arm is connect...  a good 'eye' inspection should tell you
which one that is

73
Vince
ka1iic

Homeland Security?  You be the judge see:
http://w3.ime.net/~ka1iic

Re: [AMRadio] Variac hook up

[russ dworakowski]

Steve,  using a ohmmeter,  Find out  which  terminal is  the  wiper arm-
this  is the  hot side of  the output.  The cold  side of  the  output
is  also  the neutral  terminal.  The other side  of  the  winding  is  the  
hot  side of  the line.Again  hook up  the  line  side  to
each  end of  the  windings,  the  neutral  side  is  common  to input  and  
output.  The  output terminals  are  the   wiper  and  neutral.

Russ.






From: "Steve Fitzgerald" <[EMAIL PROTECTED]>
Reply-To: amradio@mailman.qth.net
To: 
Subject: [AMRadio] Variac hook up
Date: Tue, 4 Feb 2003 17:55:00 -0500

Hello,
I bought a 20 amp 110 volt variac from an estate this past weekend.  I 
would

like to know what is the  correct way to hook up the beast.  It is made by
American Transformer Co. and the catalog number is 27666.  It has four
terminals marked 1,2,3 and 4. Can I assume that 1 and 2 are input and 3,4
are output?

Thank you,

Steve Fitzgerald N4KQR Tampa FL

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Re: [AMRadio] Variac hook up

[Donald Chester]

From: "Steve Fitzgerald" <[EMAIL PROTECTED]>


Can I assume that 1 and 2 are input and 3,4

are output?


I would be careful.  You don't want to risk connecting it up wrong and 
burning out the winding.  Most variacs have taps that allow the output to 
either go from 0 to full line voltage, or to go  from zero to about 20% 
above full line voltage.  The taps are located near the end of the winding.  
Some units have a similar tap on each end of the winding to accomadate the 
type of moutning, or if the voltage output increases when it is turned 
clockwise or anti-clockwise.


You don't want to accidently apply full line voltage between the end of the 
winding and the tap that is near that end.  I would measure the resistance 
between taps using every combination, and apply initial voltage between the 
taps with the highest resistance.  Use a 75w light bulb in series with the 
110 volt source for the initial test, to limit current in case you 
inadvertently hook things up wrong.  You should be able to determine which 
terminal goes to what tap that way.  Don't remove the bulb until you are 
absolutely certain you have the taps figured out.


In case you see gibberish below, I tried to draw a diagram.  I hope it comes 
out the same way as it looks on my screen.



hot here for 0-110v(
hot here for 0-140v(
   (< output (variable tap)
   (
   (
  neutral here_(_ common
   (
   (







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Re: [AMRadio] Variac hook up

[Tommye & Jim Wilhite]

Steve:

According to my data 2 & 4 are the input terminals.  Then 3 & 4 are
output if you want clockwise increase and 3 & 2 would be for counter
clockwise.  Notice that # 4 is common in the clockwise configuration
and # 3 would be for counter clockwise.

73  Jim
de W5JO
- Original Message -
From: "Steve Fitzgerald" <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, February 04, 2003 3:55 PM
Subject: [AMRadio] Variac hook up


> Hello,
> I bought a 20 amp 110 volt variac from an estate this past
weekend.  I would
> like to know what is the  correct way to hook up the beast.  It is
made by
> American Transformer Co. and the catalog number is 27666.  It has
four
> terminals marked 1,2,3 and 4. Can I assume that 1 and 2 are input
and 3,4
> are output?
>
> Thank you,
>
> Steve Fitzgerald N4KQR Tampa FL

[AMRadio] Variac hook up

[Steve Fitzgerald]

Hello,
I bought a 20 amp 110 volt variac from an estate this past weekend.  I would
like to know what is the  correct way to hook up the beast.  It is made by
American Transformer Co. and the catalog number is 27666.  It has four
terminals marked 1,2,3 and 4. Can I assume that 1 and 2 are input and 3,4
are output?

Thank you,

Steve Fitzgerald N4KQR Tampa FL