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Tuning a Dipole question
- Thread starter MadVeteran
- Start date
BJ radionut
Supporting Member and 6m addict
We need more info!
Please report, VSWR Ch1...Ch20...Ch40...Measured HOW ?(device)
How long is dipole overall, how mounted (inverted V/Flat top/Sloper???)
Each leg How long etc...
Trimming a Dipole Antenna - Ham Radio School.com
Please report, VSWR Ch1...Ch20...Ch40...Measured HOW ?(device)
How long is dipole overall, how mounted (inverted V/Flat top/Sloper???)
Each leg How long etc...
Trimming a Dipole Antenna - Ham Radio School.com
BJ radionut
Supporting Member and 6m addict
When adjusting the frequency of the antenna, remember the following:
- To raise the frequency, shorten the antenna
- To lower the frequency, lengthen the antenna
- Remove or add the same amount to each leg of the dipole. Both halves should measure the same after you adjust them
Thanks everyone.
I will provide all the detail the next time i set it up. I admit that the initial assessment was done with antenna strung across my bedroom (dont laugh too loud,, RF exposure?). I plan on putting it in the attic. My physical limitations mean I will have to arrange a PVC pipe arrangement to extend the wires from the attic entrance. I am thinking an inverted V deployment. The PVC will also allow me to pull the arms in for adjustment or change to a horizontal deployment. More to come.
I will provide all the detail the next time i set it up. I admit that the initial assessment was done with antenna strung across my bedroom (dont laugh too loud,, RF exposure?). I plan on putting it in the attic. My physical limitations mean I will have to arrange a PVC pipe arrangement to extend the wires from the attic entrance. I am thinking an inverted V deployment. The PVC will also allow me to pull the arms in for adjustment or change to a horizontal deployment. More to come.
BJ radionut
Supporting Member and 6m addict
MVet: Not sure if your just planning on CB band "or" planning more (Amatuer radio) later down the road?
Either way, depending on your antenna "budget" option's plus depending on size/dimensions etc. of attic space. you may have other options.
Welcome, many here to help.
All the Best
Gary/W9FNB
Either way, depending on your antenna "budget" option's plus depending on size/dimensions etc. of attic space. you may have other options.
Welcome, many here to help.
All the Best
Gary/W9FNB
Good point ,, I think this first dipole will be CB only and I do have attic room. Thanks for keeping my eyes on the potential of future radio/antenna growth.
BJ radionut
Supporting Member and 6m addict
WOW,, those are nicer attic installs than I did. I put my dipole in the attic with 1x1 wood poles (left over from last fence repairs) so that I can move the tips. Without any changes to the wire lengths SWR is way down 1.2 to 1.5 range. I guess getting the antenna away from wires and metal was a good thing.
Dont spoil my fun by telling me how hosed I will be when the snow piles on my roof. I want to be proud of my install and SWR for the time being. Maybe a strong Amp can melt the snow,, I can dream.
Dont spoil my fun by telling me how hosed I will be when the snow piles on my roof. I want to be proud of my install and SWR for the time being. Maybe a strong Amp can melt the snow,, I can dream.
I put my 2 meter quarter wave vertical in the attic. Works great except on snow days. It isn't a often used antenna anyway so I'm good.
What happens on Snow days ? Is it just poor reception or is SWR affected also ?
The receive was bad. I did not try putting an analyzer on it for SWR. Snow melted after a day or so and the receive improved again.