This is a multi-part message in MIME format. my understanding of the using a Varac in home roasting is vague at best. Are you lowering the voltage or raising the voltage. In a counter top envirnment how big a unit should you consider. (amperage wise) These things seem to run from 35 bucks to thousands. what prices are people paying for what brand where? I am sure that this subject has been beat to death before I arrived so will welcome off line comments so as not to beat a dead horse on the digest. Note: I am roasting with both a coffa Rosta and a older slightly modified AC fanned 1400 watt? popper. thanx rayk
From: "Ray Kirkland" <Snip> Depends on what you're trying to accomplish. Compensating for low ambient temp' requires higher voltage, though I seldom even need 120v and vice versa. Primarily I use it to slow the too fast roast. Sivetz professional fluid bed roasters roasts in the range of 10-15min depending on batch size. (was able to play with two different ones at Pele Plantations) Most, if not all, home fluid bed roasters roast way too fast. My Rosto hits 440°f roast standard 120v voltage in about 7min. I get a much better roast, no grassiness and better body, 440°f in 12min. At 70°f requires about 109v... (I have not split the fan and heater yet, both controlled simultaneously with variac. Plan/need to separate the fan and just control heat with variac. Should have better control that way...) <Snip> people <Snip> Get one rated to handle your roaster. I roast with the Caffe' Rosto rated 13A. I, and a couple others, are using a 20A model that runs for $109.95 plus shipping. http://store.yahoo.com/webtronics/varacouttran.htmlWas around $125 total if I recall and included a free DMM (have to enter the offer code)http://www.web-tronics.com/freedmmoffer.htmlOthers I know use the 5A model by same mfg. and over fuse to 15A. I chose not to go this cheaper, and in my opinion, foolish from a safey stand point route. MM;-) aka Kona Krazy miKe mcKoffee Variable Variac Rockin' Rosto Roasting Miss Silvia brewin' homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast
This is a multi-part message in MIME format. Ray wrote: <Snip> I'm pretty sure Mike already covered the operating instructions. Here's the variac that is popular:http://store.yahoo.com/webtronics/varacouttran.html This product is used to obtain variable AC output from a standard 110/120VAC source. There are many applications. Typical Applications Include: a.. Control Motor Speed a.. Control Label Printing Machine a.. General Use in Physics, Chemistry & EE Labs a.. Testing of Uninterruptible Power Supplies a.. Satellite Equipment Testing a.. Railroad Switching Testing a.. Telecommunication Equipment Testing a.. Vocational & College EE Lab applications a.. Testing Transformers a.. Automation Control a.. Stage Lighting Control GENERAL SPECIFICATIONS a.. 2000VA Variable Voltage Regulator(Variac) a.. 60Hz a.. Input Voltage: 110VAC a.. Output Voltage: 0-130VAC a.. Input Connector: 3-prong plug a.. Cord Length: 6 ft. a.. Analog Output Power Meter Included a.. On/Off Power Switch is Lighted a.. Carrying Handles a.. Fuse: 18A, 250V a.. Dimensions, approx: 9.9"L x 8"W x 7" H a.. Weight: 27lbs. Variable AC Output Transformer, VARIAC(AEEC-2090) AEEC-2090 1+ $109.95ea.