Coolant for dummy loads
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From: oparr on 1 Apr 2010 21:18 I've been using engine oil as a coolant for dummy loads but am wondering whether something like peanut, sunflower or avocado oil would be better. Engine oil gives off an awful smell when it breaks down, smells like rotten eggs. Can't find transformer oil. Any thoughts?
From: Phil Allison on 1 Apr 2010 21:39 <oparr(a)hotmail.com> > > I've been using engine oil as a coolant for dummy loads but am > wondering whether something like peanut, sunflower or avocado oil > would be better. ** Why use oil at all ?? It gets extremely hot and catches fire, is hazardous if spilled and is a poor absorber of heat. ...... Phil
From: Artemus on 1 Apr 2010 22:40 <oparr(a)hotmail.com> wrote in message news:904e20ba-c730-4ddf-973f-0f06bf201767(a)d33g2000vbu.googlegroups.com... > I've been using engine oil as a coolant for dummy loads but am > wondering whether something like peanut, sunflower or avocado oil > would be better. Engine oil gives off an awful smell when it breaks > down, smells like rotten eggs. Can't find transformer oil. Any > thoughts? Mineral oil. Art
From: Sjouke Burry on 1 Apr 2010 21:59 oparr(a)hotmail.com wrote: > I've been using engine oil as a coolant for dummy loads but am > wondering whether something like peanut, sunflower or avocado oil > would be better. Engine oil gives off an awful smell when it breaks > down, smells like rotten eggs. Can't find transformer oil. Any > thoughts? 100% synthetic oil.
From: mpm on 1 Apr 2010 22:04
On Apr 1, 8:18 pm, "op...(a)hotmail.com" <op...(a)hotmail.com> wrote: > I've been using engine oil as a coolant for dummy loads but am > wondering whether something like peanut, sunflower or avocado oil > would be better. Engine oil gives off an awful smell when it breaks > down, smells like rotten eggs. Can't find transformer oil. Any > thoughts? I recommend the use of either refined mineral oil or silicone oil. Baby oil is mostly mineral oil, but I have no idea what the impurities would do to your impedance. Are your loads undersized, or do you just have a hefty transmitter? We had an 8-channel FM combiner in St. Louis (all full power Class- C's, 100kW horiz, 100kW vert, or very close to it). The combiner put all the FM's on a single Harris antenna, having dual feedlines (one for top half of panel, the other for lower). Each station combiner module had a 5kW or maybe 10kW forced-air reject load. These could get pretty toasty over time. I think we had something on the order of 60 tons of air conditioning to cool the room. The combiner was manufacturered by Dielectric (Raymond, Maine). I'm fairly sure it's still in use. (?) unless IBOC killed it. (?) Good luck. -mpm |