[Homeroast] update on variable transformers

peter peter at midwestbicycleworks.com
Tue Feb 28 19:06:59 CST 2012


Well, i got two of them.  :-)

Peter

Sent from my Motorola Smartphone on the Now Network from Sprint!

-----Original message-----
From: peter zulkowski <peterz5743 at gmail.com>
To: "A list to discuss home coffee roasting. There are rules for this list,	 
available at http://www.sweetmarias.com/maillistinfo.html"  
<homeroast at lists.sweetmariascoffee.com>
Sent: Tue, Feb 28, 2012 20:03:21 EST
Subject: Re: [Homeroast] update on variable transformers

Resending this as it doesn't look sent:

Amazon shipped my  order of this thing:

http://www.amazon.com/gp/product/B001NIK6PC/ref=oh_o00_s00_i00_details

and it arrived a day early :)
I plugged it into a "Kila watt" and plugged a Poppery into it.
(A Kila-Watt is a power, amperage, Voltage monitor that costs about $25.00 )
Not too happy with this one, but the reviews were mixed on it. Several
folks got bad ones.
What I found was:
the variable was all at the top end of the dial.
At the top of the dial, it would only allow 650 Watts to go through to the
Poppery, but when I switched to to non-variable it allowed 1375W.
Just like when it was not there.

Next I went to a different circuit and tried a 1500W steamer.
Same result, only allowed 650W on variable, but full wattage on the other
side of the switch.
Also power did not vary much at the lower end of the dial, and ramped to
the max quickly at the top end.
Not much control :(
I suspect that the rheostat is defective.
Read the reviews on Amazon. Some folks are happy, and others keep getting
duds.

The one I bought will be returned and I am not sure if I will order
another. I would rather learn how to build something with some kind of
Solid State device..   Triac??

PeterZ

On Tue, Feb 28, 2012 at 12:26 PM, g paris p <pchforever at gmail.com> wrote:

> Peter;
>
> do you still want a variac? I may have a second, like new one, in the
> basement.
>
> -
>
> On Mon, Feb 27, 2012 at 2:45 PM, peter zulkowski <peterz5743 at gmail.com
> >wrote:
>
> > While rummaging through the things that I DID bring, I am becoming
> > very upset with myself here.
> >
> > When I left AZ I left my 25 amp Variac behind (too heavy) figuring I
> could
> > replace it for what I spent to get it.
> > Forgot I bought it 12 years ago! I guess I paid about $45 + shipping  
from
> > ebay at that time.
> > Now they are untouchable.
> > Need a business to justify it!
> > I left too much stuff there that I was planning to replace cheap. Oh
> well.
> > So sad that it all went in the dumpster.
> >
> > Now even the Chinese junk is way beyond my means :(
> > BUT,
> > almost forgot this part:
> > While in AZ I did pick up a red Chinese Variac knock-off at a yard
> sale...
> > free.
> > It did not work, and the guy wanted it hauled away.
> > It was heavy.
> > I like free :)
> > I took it all apart...  figuring I could fix it.....
> > you do not want to *buy* one of them.
> > My guess to what had happened to it was: it had fallen because all the
> > bearings and plastic inside was destroyed.
> > It didn't look bad on the outside though.
> > Looked to be in good shape.
> > Buyer beware. Free is okay if you have time to tinker.
> > Please do not buy Chinese Variacs.
> > From my limited experience with then, they are throw away's.
> >
> > Best,
> >
> > Peter Z
> >
> > On Mon, Feb 27, 2012 at 1:53 PM, Zev Rieser <zrieser at gmail.com> wrote:
> >
> > > Peter,
> > >
> > > Please do!! I just upgraded from a Popcorn popper to the  Stir
> > Crazy/Turbo
> > > oven, and would like to set it up so I can have full control over heat
> > for
> > > profiles.... the variac route just is very expensive, so would love to
> > have
> > > an alternate method.
> > >
> > > Zev
> > >
> > > On Mon, Feb 27, 2012 at 1:38 PM, peter zulkowski <peterz5743 at gmail.com
> > > >wrote:
> > >
> > >
> > _______________________________________________
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> >
> >
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