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Looper's Delight
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Z. Many months ago I had a problem with blowing fuses in one of my echoplexii. I bought the same size replacements (i forget, is it 1/4 amp?, and they blew too. I dissasembled and inspected the echoplex for any shorts, found nothing wrong. I noticed that the fuses would not necessarily blow right away, but might take several power cycles to blow. I watched several fuses on power up and saw that they emitted a flash of light on power up (but the fuse was still intact). When I measured the fuse resistance before and after a flash, I saw that the resistance was increasing on the fuse, after it flashed. Next time or 2 I powered the edp up the fuse would blow. I tried different brands of fuses, nothing seemed to work very long. I took a fuse out of another working echoplex (factory original fuse), put it in the offending echoplex, and no problem, the fuse did not blow. I put a replacement fuse in the good edp, and the replacement would blow just like in the other edp. I could not see any difference in the factory original fuse that worked and my replacement fuses that blew quickly. I measured the current draw from the edp that first blew the fuse, and my other 2 edp, and saw no difference in current draw. In desparation I installed a slightly larger fuse (kids don't try this at home). It worked then, and has worked fine for months now. My only guess is that the edp is drawing surge current (on power up) very close to the original fuses limits, and that the 1/4 amp replacements I bought were on the low end of the distribution (of current req'd to blow the fuse). Disclaimer: Your mileage may vary, proceed at your own risk. It is dangerous to put in a larger fuse than the manufacturer recommends. Don't blame me if your edp really has a problem, and it burst into flames if you put a larger fuse in it. bret --- wb5150@earthlink.net wrote: > My EDP has inexplicably blown two fuses in the past > week. Has anyone > else suffered through this dilemma? If so, were > there strange causal > factors involved? Also, which intoxicants seemed to > work best during the > downtime? > > Z. > > __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com