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#1
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Should work fine, as long as you can keep the water out of it. People
using larger coax with similar construction have reported it to be near impossible to keep water out. And if water gets in, the loss will go _way_ up. Roy Lewallen, W7EL Ken wrote: I was given a 1,000 foot spool of RG-62 and was trying to think of a use for it. I'd like to put up a 1/4 40 meter vertical and feed it through parallel runs of RG-62. Has anyone ever done this? I have the antenna, coax and radial wire, so I don't plan on buying anything else. Ken |
#2
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In that case, I have yet another caution. A tupperware container will
become brittle from exposure to the sun, and crack. How long this takes depends on the intensity of the sun. Here in Oregon's Willamette Valley, it'll last a couple of years or so. I'll bet one wouldn't last six months in Denver. I'm right now in the process of accumulating parts to rebuild my antenna switch box, formerly housed in plastic containers, into an ammo box. You might be able to seal the cable end adequately with RTV. I'll bet some of the folks who've used Belden 9913 (similar construction to RG-62) have some suggestions. It's been discussed from time to time on this newsgroup, so a google search on 9913 in this group would bring you more information. Roy Lewallen, W7EL Ken wrote: Roy Lewallen wrote: Should work fine, as long as you can keep the water out of it. People using larger coax with similar construction have reported it to be near impossible to keep water out. And if water gets in, the loss will go _way_ up. Roy Lewallen, W7EL Thanks Roy, I planned on using a small tupperware container at the antenna end. |
#3
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Roy:
You will find that a yellow Prestone anti-freeze bottle will last at least 5 years, and likely 10. We get plenty of UV here in S. Texas, and I have found them to have the highest survivability of any plastic except Lexan. My 160 meter tuner is in one, as I didn't want to use a small coil or a large metallic enclosure. I use 2, cut the top off of one and invert it, and then use the inverted bottom from another as a press fit closure. No fasteners needed, although I usually put a couple 6-32 screws through the resulting double flange for good measure. The old red bottles were equally as good, but now hard to find. And for Ken, the best way to seal the end of that psuedo air line is some of the shrink tubing with the filler adhesive inside. Then point the sealed end DOWN. -- Crazy George Remove NO and SPAM from return address "Roy Lewallen" wrote in message ... In that case, I have yet another caution. A tupperware container will become brittle from exposure to the sun, and crack. How long this takes depends on the intensity of the sun. Here in Oregon's Willamette Valley, it'll last a couple of years or so. I'll bet one wouldn't last six months in Denver. I'm right now in the process of accumulating parts to rebuild my antenna switch box, formerly housed in plastic containers, into an ammo box. You might be able to seal the cable end adequately with RTV. I'll bet some of the folks who've used Belden 9913 (similar construction to RG-62) have some suggestions. It's been discussed from time to time on this newsgroup, so a google search on 9913 in this group would bring you more information. Roy Lewallen, W7EL Ken wrote: Roy Lewallen wrote: Should work fine, as long as you can keep the water out of it. People using larger coax with similar construction have reported it to be near impossible to keep water out. And if water gets in, the loss will go _way_ up. Roy Lewallen, W7EL Thanks Roy, I planned on using a small tupperware container at the antenna end. |
#4
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Thanks for the tip. That's a good low-cost solution, and anything
lasting 5-10 years there should last nearly a lifetime here. I've also found that you can get plastic electrical boxes intended for outdoor use at reasonable cost at home supply stores. They'd be a good choice if something sturdier is needed, and they should put up with the sun ok. Some plastics are definitely much better than others, and a lot of 'em don't last long at all. Roy Lewallen, W7EL Crazy George wrote: Roy: You will find that a yellow Prestone anti-freeze bottle will last at least 5 years, and likely 10. We get plenty of UV here in S. Texas, and I have found them to have the highest survivability of any plastic except Lexan. My 160 meter tuner is in one, as I didn't want to use a small coil or a large metallic enclosure. I use 2, cut the top off of one and invert it, and then use the inverted bottom from another as a press fit closure. No fasteners needed, although I usually put a couple 6-32 screws through the resulting double flange for good measure. The old red bottles were equally as good, but now hard to find. And for Ken, the best way to seal the end of that psuedo air line is some of the shrink tubing with the filler adhesive inside. Then point the sealed end DOWN. -- Crazy George |
#5
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On Wed, 24 Sep 2003 16:32:54 -0500, "Crazy George"
wrote: Roy: You will find that a yellow Prestone anti-freeze bottle will last at least 5 years, and likely 10. We get plenty of UV here in S. Texas, and I have found them to have the highest survivability of any plastic except Lexan. My 160 meter tuner is in one, as I didn't want to use a small coil or a large metallic enclosure. I use 2, cut the top off of one and invert it, and then use the inverted bottom from another as a press fit closure. No fasteners needed, although I usually put a couple 6-32 screws through the resulting double flange for good measure. The old red bottles were equally as good, but now hard to find. We have to make sure the things are well sealed here in southern Michigan or they get filled with Yellow Jackets. Roger Halstead (K8RI EN73 & ARRL Life Member) www.rogerhalstead.com N833R World's oldest Debonair? (S# CD-2) And for Ken, the best way to seal the end of that psuedo air line is some of the shrink tubing with the filler adhesive inside. Then point the sealed end DOWN. |
#6
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We have similar problems here, Roger, but that is the point of using the
second bottom, which is a press fit inside the bead of the other container. This leaves a slight recess for controls. If you want no recess, then put the cut off bottom in right side up, and you end up with essentially a double ended sealed (except for the seam between pieces) bottle. Breathes just enough to equalize pressure changes, seam isn't big enough for most insects. Tiny ants might squeeze in, but insecticide could fix that. -- Crazy George Remove NO and SPAM from return address |
#7
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On Thu, 25 Sep 2003 22:28:58 -0500, "Crazy George"
wrote: We have similar problems here, Roger, but that is the point of using the second bottom, which is a press fit inside the bead of the other container. This leaves a slight recess for controls. If you want no recess, then put the cut off bottom in right side up, and you end up with essentially a double ended sealed (except for the seam between pieces) bottle. Breathes just enough to equalize pressure changes, seam isn't big enough for most insects. Tiny ants might squeeze in, but insecticide could fix that. Just throw in a single moth ball. :-)) Yellow Jackets have turned out to be a real problem over the past two years. Last year I destroyed over 40 nests on our 200 X 200 foot lot. I really don't know how many thousands I've done in, but it's a lot. We had them get under the siding just under the peak of the roof on the sough end. They built a nest so large it popped the siding loose and it had to be re-nailed. About a month ago I went out to move some sections of a C-band satellite dish. I had them stacked 2 by 2. I had hauled away several pair when I reached for one and had it slip out of my grip as I went to pull it away from the one under it. All of a sudden there was a cloud of Yellow Jackets coming out from around each side. I beat a hasty retreat (full tilt), but unfortunately I was building the base for a small outbuilding right behind where I was standing. I had 7 2 X 6s running North and south with the top edges about 14 inches off the ground. I was headed west. I made it all the way through with just one barked shin and never fell. I waited till dark, set up some halogen lights to blind them and then squirted in some wasp and hornet killer. The kind that shoots a solid stream. When I got the dish section out I found a nest over a foot across in there. (and...I never got stung which is a lot better than last summer with a total of 4. Three yellow Jackets and one wasp got me.) Actually throwing a few mothballs around the attic insulation should keep out the bees as well. BTW, I'm probably going to use something similar to house a matching network as I'm either going to put up an inverted L, or shunt feed the tower for 160. Roger Halstead (K8RI EN73 & ARRL Life Member) www.rogerhalstead.com N833R World's oldest Debonair? (S# CD-2) |
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