[Homeroast] Roasters

Barry Luterman lutermanb at gmail.com
Thu May 20 12:29:48 CDT 2010


Should have suggested a surge suppressor. I don't really know my
electronics.  I just got a droid and after 4 days I can almost make phone
calls with it. My original suspicion of what is causing his problem, however
remains unchanged.

On Thu, May 20, 2010 at 7:19 AM, Mike Chester <mchet at charter.net> wrote:

> A Variac does nothing to remove spikes.  It simply supplies a steady rate
> change to whatever is put in.  The output can, for example, be set at 110%
> so if you have only 100 volts in, you will get 110 volts out, but if the
> input spikes to say 130 volts, the output will spike to 143 volts. (110%) To
> remove spikes you need at least a surge suppressor.  A line conditioner
> would be optimal, but they are quite expensive.  For the EEs out there, this
> is a simplified explanation. I know that the autotransformer does supply a
> slight inductance filtering, but at line frequency it is negligible.
>
> Mike Chester
>
> --------------------------------------------------
> From: "Barry Luterman" <lutermanb at gmail.com>
> Sent: Wednesday, May 19, 2010 2:23 PM
>
> 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>
> Subject: Re: [Homeroast] Roasters
>
>   My first thought is the electricity in your home. That is, that you get
>> a
>> lot of power spikes which are taking down your small appliances. If so you
>> may have to add a Variac to your roasting equipment/
>>
>> On Wed, May 19, 2010 at 8:13 AM, <Tomenid at aol.com> wrote:
>>
>> Why is it that coffee roasters have such lousy heating systems? My first
>>> IRoast had a faulty system that roasted coffee to ash in under 10
>>> minutes,
>>> the  second worked for a few months, then at eight minutes proceeded to
>>> heat
>>> up to  high levels and burn everything to ash. My first Gene had a faulty
>>> thermostat  that again turned beans to ash in a matter of minutes and
>>> then
>>> melted most of  the machine. Two others went the other direction, with
>>> the
>>> thermostat failing to  go over 450F. And all of this after cleaning after
>>> each
>>> use and relatively minor  use.
>>>
>>> Tom
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