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Dymek McKay DA100E
I just had a second failure (of 6 DA100E's owned for I guess 6 years,
so that's 18 years per DA100E average so far) The first one went to 100% thermal noise The second one went to what sounded like an intermittent short in the coax, blowing my 1/4a fast-blow fuse every few hours as well (which protects its internal 1/3a fast-blow fuse). It's in the antenna's 50' lead if it's in the coax, and there's no obvious place that that might happen, so it's probably not the coax. Anyway I dug out my spare DA100E, measured the distance to the connector against the ground, located the existing wire with an AM radio tuned to null a weakish station (dragged across the ground until the station popped up) and dug right within 2" of the existing connector. The replacement works great, very quiet. I guess it had been making some noise for a while and I didn't notice consciously. -- Ron Hardin On the internet, nobody knows you're a jerk. |
#2
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Dymek McKay DA100E
On Sun, 06 Nov 2005 21:16:33 GMT, Ron Hardin
wrote: I just had a second failure (of 6 DA100E's owned for I guess 6 years, so that's 18 years per DA100E average so far) The first one went to 100% thermal noise The second one went to what sounded like an intermittent short in the coax, blowing my 1/4a fast-blow fuse every few hours as well (which protects its internal 1/3a fast-blow fuse). It's in the antenna's 50' lead if it's in the coax, and there's no obvious place that that might happen, so it's probably not the coax. Anyway I dug out my spare DA100E, measured the distance to the connector against the ground, located the existing wire with an AM radio tuned to null a weakish station (dragged across the ground until the station popped up) and dug right within 2" of the existing connector. The replacement works great, very quiet. I guess it had been making some noise for a while and I didn't notice consciously. Oddly enough, my MFJ-1024 continues to perform nominally, constantly on for 7 years. But I do run it at reduced voltage... |
#3
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Dymek McKay DA100E
On Sun, 06 Nov 2005 21:16:33 GMT, Ron Hardin
wrote: I just had a second failure (of 6 DA100E's owned for I guess 6 years, so that's 18 years per DA100E average so far) The first one went to 100% thermal noise The second one went to what sounded like an intermittent short in the coax, blowing my 1/4a fast-blow fuse every few hours as well (which protects its internal 1/3a fast-blow fuse). It's in the antenna's 50' lead if it's in the coax, and there's no obvious place that that might happen, so it's probably not the coax. Anyway I dug out my spare DA100E, measured the distance to the connector against the ground, located the existing wire with an AM radio tuned to null a weakish station (dragged across the ground until the station popped up) and dug right within 2" of the existing connector. The replacement works great, very quiet. I guess it had been making some noise for a while and I didn't notice consciously. My DA100D has been running since '88, nary a prob. bob k5qwg |
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