I have several 11 meter antennas lying around, and would like to know if they can be converted to 2 meter.
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2 meter antenna from an 11 meter.
- Thread starter bird hunter
- Start date
Generally converted NO. The metal cut to proper lengths and built from scratch sure no problem.Tubing is tubing. I rebuilt a Wilson Shooting Star into a six element beam for 6m and used some of the left overs to make a five element 2m yagi for a friend.
Yeah, I should have asked that one myself. Mobile antennas are not so easy as you have the coils to contend with in most cases.
Most of the antennas I have are fiberglass whips, but I do have some steel whips and a couple of monkee made.
They could be converted, but it won't be very simple. Probably easier to just use a home made 2 meter antenna, but that's what you're thinking of isn't it.
If the fiberglass antennas are spirally wound (most likely), at the very least it would mean finding the correct length regarding the inductance of those coils. That would be much shorter than commonly thought, and not really all that 'productive'. And then you get to deal with finishing off that fiberglass part.
Probably, using the base ferrules and mount, then adding a 19" whip would yield about as good as anything. One aspect is that any 11 meter sized antenna has to be more 'heavy duty' than a typical 2 meter antenna, they're just bigger, you know? If that aspect doesn't bother you, then so what. And then you'd miss out on all that 'messing' around getting the thing to work. Or, build a small matching coil and fiddle around with the taps till it/they work. Whatever, do it, do it!
- 'Doc
Come to think about it, what's an 'OutBacker' but a helically wound antenna with a 'tap' lead to use the necessary helical coils as a loading coil?
If the fiberglass antennas are spirally wound (most likely), at the very least it would mean finding the correct length regarding the inductance of those coils. That would be much shorter than commonly thought, and not really all that 'productive'. And then you get to deal with finishing off that fiberglass part.
Probably, using the base ferrules and mount, then adding a 19" whip would yield about as good as anything. One aspect is that any 11 meter sized antenna has to be more 'heavy duty' than a typical 2 meter antenna, they're just bigger, you know? If that aspect doesn't bother you, then so what. And then you'd miss out on all that 'messing' around getting the thing to work. Or, build a small matching coil and fiddle around with the taps till it/they work. Whatever, do it, do it!
- 'Doc
Come to think about it, what's an 'OutBacker' but a helically wound antenna with a 'tap' lead to use the necessary helical coils as a loading coil?
i was stunned by how well a jpole made from plumbing pipe works on 2m.. and it is directional to some extent.
you can make a jpole and then use it later (isolated from the boom of course) as the driven element is a home made beam. think, home depot pvc boom.
you can make a jpole and then use it later (isolated from the boom of course) as the driven element is a home made beam. think, home depot pvc boom.
I've made a few from glass whips.
Cut the plastic coating off, unwind the wire making sure to not break the connection at the base.
Cut the glass to 19 1/2", then string the wire straight up the cut whip.
Cut the wire a bit longer than the whip, you can fold it over to tune the antenna.
Then wrap it with electrical tape ( you can get different colors if you want.) from the bottom up, spiraling the tape.
Tune the antenna by lengthening or shortening the wire.
Then replace the cap.
Cut the plastic coating off, unwind the wire making sure to not break the connection at the base.
Cut the glass to 19 1/2", then string the wire straight up the cut whip.
Cut the wire a bit longer than the whip, you can fold it over to tune the antenna.
Then wrap it with electrical tape ( you can get different colors if you want.) from the bottom up, spiraling the tape.
Tune the antenna by lengthening or shortening the wire.
Then replace the cap.
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