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voltage regulator
I am getting some variation in power to my Omega D5 due to home
appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? David Clarkson |
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voltage regulator
"David Clarkson" ha scritto nel messaggio ... I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? On my krokus I use 500 W lamp, during the focusing a diode is connected on the line, when print is bypass. very low cost solution. |
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voltage regulator
"David Clarkson" wrote
I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. 1st: Minimize the voltage sag. See if you can plug the enlarger into an outlet that goes straight to the fuse box without any major appliances on the same line. You may need to string a heavy duty extension cord to get to a low-demand AC outlet. 2nd: Add regulation. The standard fix is a "Sola" ferroresonant transformer. These are made by many firms (including Sola) and are sometimes called something slightly different, usually variations on 'regulating', 'transformer' and 'resonant'. Solas last forever. Get a used one as new ones are expensive. Look around at electronic surplus outlets on the web, ebay, a WTB posting on the darkroom marketplace usenet group and photo web sights with buy/sell forums. Some dichoric and VC heads use 80V quartz-halogen lamps with a special regulating power supply box. I am sure one is available in a standard Omega 'D' fitting. Other fixes have been proposed: certain UPS computer supplies, those that constantly charge the batteries and constantly run the computer from those batteries, will provide regulation -- these are usually big ticket items, though. Some of the smaller UPS may also work well in this application. There was a little box called a "Wein Regulite" that works if the voltage sags but can't regulate if the voltage goes much above 117 VAC. The design and construction are dubious, use at your own risk. In fairness I have not heard of any catastrophic failures with this device. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
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voltage regulator
"David Clarkson" wrote in message
... I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? David Clarkson The choice of the regulation may vary depending of the voltage of your enlarger's lamp. Mine uses a 12V/75W and after having built an electronic one, I opted finally for a commercial switching regulated supply: http://www.bonavolta.ch/hobby/en/photo/v35suply.htm Please note the comments regarding the supply protection types as some will not work properly with lamps due to the high inrush current when switching on. Regards, -- Claudio Bonavolta http://www.bonavolta.ch |
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voltage regulator
David Clarkson wrote in message . ..
I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? David Clarkson There have been a number of queries about voltage regulation. Are you all so sure that is the problem? My guess is that voltage is unlikely to be the issue. I had the same thoughts about some erratic results but found that my problems were a product of my processing methodology which included a very dilute print developer. I assume there are other examples of erratic processes that can cause the same frustration. Check into it before buying another gadget. Signed No gadget(if possible) Nick |
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voltage regulator
David Clarkson wrote:
I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? David Clarkson I use a TrippLite Voltage Regulator and Conditoner model LS604AX that will handle up to 600 watts. It was originally used to isolate a large printer. Works great. It is small, about 4x5x6, kind of heavy, around 10 pounds. Perhaps one will show up on eBay but I have not seen them. Go to http://www.tripplite.com/products/co...ners/index.cfm. Mine looks identical to the one on the left. Click on the LS606M or the LS604WM for possible candidates. I don't see a price. I got mine when it was going to be thrown away with an old printer. Bert |
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voltage regulator
David Clarkson wrote:
I am getting some variation in power to my Omega D5 due to home appliances and a heating furnace. Any recommendations for a regulator to minimize the changes? David Clarkson There are several, at least 2, on auction at eBay. Here is one, found by searching for "tripp lite": http://cgi.ebay.com/ws/eBayISAPI.dll...9993 047&rd=1 and http://cgi.ebay.com/ws/eBayISAPI.dll...9998 098&rd=1 or, for higher ratings http://cgi.ebay.com/ws/eBayISAPI.dll...8409 740&rd=1 Price seems reasonable for now but beware of shipping charges. The thing weighs around 10 pounds, not including packing. This one is similar to the one I mentioned earlier but mine has four outlets instead of the two this one shows. Note that these are line conditioners and voltage regulators, they are not UPSs, they have no batteries, just active regulation circuits. They are also not just spike suppressors, they have active regulation and will protect against brownouts and spikes. Disclaimer: I have nothing to do with the sellers on the above mentioned auctions. Bert |
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