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32
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eHam Forums / Antennas and Towers and more / Horizontal wire dipole
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on: March 17, 2007, 05:57:49 PM
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Hope you guys aren't getting sick of me.
Question: with my 8+ foot wire elements what should I do with the very end? Can knot the end of the wire into a dogbone or does the end have to be PERFECTLY straight?
Rob
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34
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eHam Forums / Elmers / When the sunspots come back.
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on: March 17, 2007, 03:53:11 PM
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"
You don't want junk for an antenna, but you don't have to spend a bundle to put up a decent antenna on 10m. If you just want an OK starter antenna, you can easily build a dipole for under 25 dollars. It'll only be about 16 1/2 feet long. For a balun, just wind 3 or 4 turns (about 4 to 6 inches in diameter) of coax at the feedpoint, and it'll work OK.
"
Whats the math in dertirming the Balun? and when you say feed point you mean just below where the elements connect to the coax right?
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35
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eHam Forums / Antennas and Towers and more / 10Meter dipole with copper tubbing instead of wire
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on: March 17, 2007, 02:58:14 PM
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"
If you meant to use it as a horizontal dipole, then also that would work fine too. Again the strength of the feedpoint would have to support the antenna if it would be center mounted. If this was mounted 15 feet or up, it would have some directional component to it allowing you to peak some signals while nulling others.
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Well I am thinking of a horizontal dipole. Copper tubbing would remove the need of having to support wires.
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However, now is not a good time of the sunspot cycle to be listening for the 10 meter DX beacons. Check back in a couple of years if you want to work DX on 10.
"
Oh i know the band is dead right now, my think is, I just want to be able to hear SOMETHING even a beacon would make me wet myself.
After I get my license on the 27th I'm prolly going to setup a sked with one of the local guys here in Salt Lake just so I can say I did it.
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37
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eHam Forums / Elmers / The sounds of "HF"
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on: March 17, 2007, 01:42:15 PM
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"Get a dipole or an A-99 up, and listen in the mid day and early evenings on the calling frequencies. "
How high would I need to mount one of these? Or could I use it at ground level?
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38
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eHam Forums / Elmers / When the sunspots come back.
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on: March 17, 2007, 01:38:09 PM
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I've been thinking for a 10M dipole why use 8 feet of wire?
Here's what I'm thinking, 8ft copper tubbing to replace the wires. This could sit on-top of a couple 10' PVC pipes
"house-clamped" together and then hose clamped to a fence post. or the tree in my backyard.
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40
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eHam Forums / Antennas and Towers and more / 10Meter dipole with copper tubbing instead of wire
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on: March 17, 2007, 01:11:59 PM
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I've been thinking for a 10M dipole why use 8 feet of wire?
Here's what I'm thinking, 8ft copper tubbing to replace the wires. This could sit on-top of a couple 10' PVC pipes
"house-clamped" together and then hose clamped to a fence post. or the tree in my backyard.
I just need something better then my mobile-verticle i have on the roof, it's simply picking up NOTHING.
20 feet up or so, would I need to guy the antenna ?
Because what I have now is mobile vertical on my roof and I'm not even able to pull in beacons with it.
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44
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eHam Forums / Elmers / The sounds of "HF"
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on: March 16, 2007, 11:57:44 PM
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The antenna is nowhere near any source of interferences.
I think the next thing I'm going to try and do is get a 10M dipole 20 or 30 feet in air because ATM I'm not picking ANYTHING up.
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45
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eHam Forums / Elmers / The sounds of "HF"
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on: March 16, 2007, 07:53:43 PM
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Maybe I should move the radio away from the computer it's sitting next to and off of the top of the Astron PS.
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