Have you contacted Peter (PV Electronics) about the heat issue? I have used I think three of his kits, and I have not noticed anything getting particularly hot. The first clock I built has been in operation for over a year now, and if the clock were to go down, I am sure my daughter would be on the phone asking me to fix it.
I think you may run into an issue with noise with such a small fan. One thing you can do is run it at 7v and that may help with the noise. Keep us updated on your solution. ...Semper Fidelis... On Tuesday, October 7, 2014 11:30 PM, Nicholas Stock <nickst...@gmail.com> wrote: Darin, the clock may get a little warm, but I think you may be worrying overtly. The holes under the case allow air to circulate up and through/around the PCB and out the holes around the tubes by convection. If you do plan on adding a fan (I don't think this is necessary, but hey it's a free world), take into account that the circuit has a 500 mA polyfuse, so if you plan on adding the fan to the circuit side 12V rail make sure it doesn't draw more than 100 mA or so. Nick On Tue, Oct 7, 2014 at 6:52 PM, Dman777 <darin.hens...@gmail.com> wrote: I will drill some small holes for cool air intake on the sides and on top. > > >The fan will be drawing out air from the bottom. I won't change that. With the >heat dispersed, it will not be issue as it is in one concentrated spot. I am >more concerned with the questions I have in mind from the original post, >please. > > >Thanks, >-Darin > >On Tuesday, October 7, 2014 8:18:59 PM UTC-5, Dman777 wrote: >I have a 6 digit Nixie ZM5660 clock that I got from pvelectronics that is >beautiful and super cool. Everything is perfect about it. However, since it is >multiplexed there is one spot that has a very high concentration of heat. I >want to place a fan underneath the clock to draw out this hot air, otherwise >the life of the clock will not be as long as it will without the heat. >> >> >>I will be taking dremel and drilling a large area underneath the case and >>placing a fan against the case surface(outside of the case) to draw out the >>hot air. I will then wire the 12v fan to the power supply connectors. When >>done, I will be placing the clock case on two blocks so there will be about 3 >>inches of area between the bottom of the clock(with the fan) and the shelf it >>sits on. I addition, I will drill some small holes for cool air intake on the >>sides and on top. >> >> >>A few questions come to mind, please: >> >> >>1) The case is only 3/4 of inch deep. Should I go for a 2 inch fan or 1 inch >>fan? Typically, a 2 inch fan will draw more heat out. But sincethere will >>only be able 3/8" of space between the fan and circuit board, I am not sure >>which would be more effective in drawing heat out. >> >> >>2) The source of heat is in the center middle of the clock. If I place the >>middle of the fan directly underneath the heat concentration, will that heat >>just sit since it won't be above the blades but instead above the rotor? >>Should the fan be off center to the actual heat concentration? >> >> >>3) I would like a fan with a good ratio of not to loud but move enough heat >>out. Not sure which would be a good cfm. >> >> >>4) I don't understand why, the heat concentration is in the dead center of >>the clock, but the source of what I think is the source of the heat...the >>7805 voltage regulator... is of to the side of the source of the heat >>concentration area. >> >> >>5) Do I need to worry about trace erosion from air flow and friction? On my >>old Xbox I had the fan running high in it and one of the traces eroded. >> >> >>Here are some of the fans(Would like to stick with ball bearing) I have been >>looking at. I am big fan of Sunon: >>1 inch: >>http://www.jameco.com/1/1/2967-kde1203pfb2-8-ms-dc-brushless-tubeaxial-fan-bearing-type-ball.html >> >>http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_1708465_-1 >> >> >> >>2 inch: >>http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?refineValue=Ball&refineType=1&langId=-1&position=1&productId=1950446&refine=1&catalogId=10001&history=6fqaemmj%7CsubCategoryName~DC%2BBrushless%2BFans%5Ecategory~3715%5EcategoryName~cat_37%5EprodPage~15%5Epage~SEARCH%252BNAV%401bnairch%7Ccategory~371530%5EcategoryName~cat_3715%5Eposition~1%5Erefine~1%5EsubCategoryName~DC%2BBrushless%2BFans%2B%252F%2B2.00%2522%2B%252850mm%2529%5EprodPage~15%5Epage~SEARCH%252BNAV%40dnogx9g3%7CrefineValue~SUNON%5ErefineType~1%5Eposition~1%5Esub_attr_name~Manufacturer%5Erefine~1%5EprodPage~15%5Epage~SEARCH%252BNAV&sub_attr_name=Bearing&storeId=10001&ddkey=http:StoreCatalogDrillDownView >> >> >> >>Thanks, >>-Darin >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >-- >You received this message because you are subscribed to the Google Groups >"neonixie-l" group. >To unsubscribe from this group and stop receiving emails from it, send an >email to neonixie-l+unsubscr...@googlegroups.com. >To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5d257e7b-2330-407e-ba00-147f62ee78f7%40googlegroups.com. > >For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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