[Homeroast] Sucky decaf

Tom & Maria - Sweet Maria's Coffee sweetmarias at sweetmarias.com
Sat Jun 26 13:02:07 CDT 2010


Thanks for the clarification

>A Variac (autotransformer) varies the ac (voltage).  Dimmers adjust the duty
>cycle (% of each cycle of the waveform that is passed - pulsed).
>
>-----Original Message-----
>From: homeroast-bounces at lists.sweetmariascoffee.com
>[mailto:homeroast-bounces at lists.sweetmariascoffee.com] On Behalf Of Tom &
>Maria - Sweet Maria's Coffee
>Sent: Saturday, June 26, 2010 12:05 PM
>To: A list to discuss home coffee roasting. There are rules for this list,
>available at http://www.sweetmarias.com/maillistinfo.html
>Subject: Re: [Homeroast] Sucky decaf
>
>Hey Michael - if you do separate the heater from the fan, wouldn't it
>then be feasible to use a high rated dimmer (ones sold as router
>dimmers, 1000 watts)? Those can be had for $25. I understand (I
>think) a dimmer starves the voltage whereas a variac offers pulses of
>power, but since we are talking only about a heat coil, starving it
>seems fine (?)
>
>Tom
>
>>Greg,
>>
>>Following up on Brian's implied question "If you have The Poppery, and not
>a
>>Poppery II".  You have been using an unmodified machine for long enough
>that
>>I expect getting all 'Geeky' about modifications isn't something you are
>>interested in.  This thread has included several good suggestions.
>>
>>I believe that following Tom's suggestions will lead you to the conclusion
>>that you need to slow the roast, there are any number or solutions. I
>>believe you'll find that the previously mentioned 12 minute target will
>>solve your problem (I personally shoot for closer to 15 minute overall
>>time).  Slowing the heat-up rate to below 10 degrees F per minute just
>prior
>>to the onset of 1st crack and maintaining a slower rate to End Of Roast
>will
>>open up whole new coffee perspectives for you.
>>
>>loading the machine with less beans will allow more heat to escape and
>>thereby slow the roast
>>
>>The commonly recommended use of a long extension cord to add enough
>>resistance to the circuit and thereby lower the voltage to a level that
>>lengthens the roast works.  This solution pre-supposes that you make sure
>>the extension cord isn't of a small enough gauge to allow it to get
>>physically hot, this could generate extra work for your local fire
>>department.
>>
>>Another common method is to power the Poppery through a Variac
>>(auto-transformer / variable transformer).  Tom used to offer one on the
>>Sweet Marias site but I don't seem to be able to find it.  If you decide on
>>this solution, a really simple mod is to 'split wire' the roaster.  It
>>entails removing the bottom and wiring two separate power cords to the
>>terminals on the bottom, one for the fan and one for the heater. This
>allows
>>running the fan at full speed, plugged directly into a wall receptacle and
>>lowering the power level (voltage) to the heater by powering the heater
>>circuit through the variac.
>>
>>I've tried the patience of list members before by getting too technical and
>>generating long how-to's on the list so if you need any other suggestions
>>and/or directions email me direct.  Glad to help.
>>
>>Mike (just plain)
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>
>--
>-Tom
>
>____________________________________________________________________________
>"Great coffee comes from little roasters" - Sweet Maria's Home Coffee
>Roasting
>                Thompson & Maria - http://www.sweetmarias.com
>____________________________________________________________________________
>      Sweet Maria's Coffee - 1115 21st Street, Oakland, CA 94607 - USA
>              phone/fax: 888 876 5917 - info_at_sweetmarias.com
>
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>Homeroast mailing list
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>http://host.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmari
>ascoffee.com
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>http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
>
>
>
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-- 
-Tom

____________________________________________________________________________
"Great coffee comes from little roasters" - Sweet Maria's Home Coffee Roasting
               Thompson & Maria - http://www.sweetmarias.com
____________________________________________________________________________
     Sweet Maria's Coffee - 1115 21st Street, Oakland, CA 94607 - USA
             phone/fax: 888 876 5917 - info_at_sweetmarias.com



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