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Old 07-29-2009, 04:05 PM   #29
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It looks like the top rung of a ladder.If the rest of the ladder is inside the trailer,well that's what it is!

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Old 07-29-2009, 05:50 PM   #30
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Clearly, it's a carrying handle.

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Old 07-30-2009, 12:31 PM   #31
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okay, i got up there and because i could find no exploded view of the reefer roof vent, i decided to yard the dang thang off. 10 rivets later, i found an oval raised extrusion, with 1/4 inch screen on top-along with about 1 inch of pine needles! they are bad, cuz they knit together and "thatch" a major blockage of the vent. Well, while there, I noticed a 3/4 inch diameter grommet thru the vent cover-so it appears that the "mod" was some kind of antenna mount-the grommet (and the hole in the screen) were to pass a coaxial cable through. But it is all gone now. The oval hole is about 6 inches by 16 inches and I added a single 4 inch in diameter fan to boost the chimney effect of the reefer vent. Now, my pea brain says that single fan in that big hole aint gonna do anything. So, I temporized everything in place with the plan to come back, build a shroud and mount perhaps 3 of those fans....really get a hurricane going. Andy, I agree with the floor mounting idea-also ran into that on another thread about very new trailers having such (and them being noisy), but the rm 2820 reefer that I put in doesnt leave any room in and around the louvered lower vent. so, I need to create the hurricane. Because I have a trip looming very soon-I temp'y'd up the single fan in the hopes it does something...thanks for all the cool insights-but one of the first responders was closest with the antenna idea, which was a little obvious if you thought about it, but who would'a thunk a towel rack could serve as an antenna mount...reminds me of my late dad's beer can antenna-he (W5LT) soldered a series of "808's" (amateur radio-ham-speak- for beers) cans into a "mono-pole"---'course those cans were steel, then. I don't remember if the antenna worked, but that was my dad's specialty, and he usually didn't take junk to the field days...sure wish I had that thing. Wish I had the totem pole we carved, too. but, wishing don't make it so....the pix show the hole with tape measure for scale-the vent cover, and the screen (black dot indicates where the coax passed thru...)
be cool.
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Old 07-30-2009, 01:18 PM   #32
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Uh-oh. Looks like your vent cover had a little accident in the center picture.
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Old 07-30-2009, 01:30 PM   #33
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Originally Posted by markdoane View Post
Uh-oh. Looks like your vent cover had a little accident in the center picture.

wmarsha, I think you will be surprised how well one fan helps. I put one in my lil' trailer in about the same location and it really helped the fridge stay cool. If you find you have an extra hole put a rivet in it.


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