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Old January 28th 13, 01:34 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Sep 2012
Posts: 63
Default 2m antenna home brew??

Ok
So the 11 meter ringo wont work after shortening and tuning and pruning for
2m.

Other than making a beam out of it like you suggest, is there anything I can
transform it into? I don't want it for cb, just 2m.

You are right, there is a lot more to know about making antennas then what I
am doing, I wont dispute that.

I only want to know some good ideas or practical ideas for this clean
antenna. Yes, I could buy a new antenna, but I don't want to.

Thanks,,

73s





"Channel Jumper" wrote in message
...

I think that everyone on this forum has missed the point.
The op does not understand how antenna's works, is stuck in the CB radio
and won't listen to reason.

A 9' long Ringo is 6 meters - 50 MHz.
It is also a 1/4 wave antenna for 27 MHz but will not work for 11
meters, because the impedance is all wrong - almost 5:1 VSWR....

When you shorten a antenna that is designed to work on another
frequency, the design has to match in order for it to work and have the
right impedance and be resonant.

A full wave antenna, other then a dipole antenna is not a balanced
load.

The ring on the Ringo is the match, and the ring is around 32 inches
long.
You have to subtract 30 inches from the total length - which a resonant
antenna would only be about 40 inches long.

That doesn't leave much of a stub sticking up for a vertical radiator.

I gave away a HALO antenna for two meters, for working SSB and digital
modes and the diameter of it was only about 24 inches.

Making a antenna is not as simple as just sticking something up in the
air and connecting the coax to it and cutting off the excessive length
and expecting it to work, like a mobile CB radio antenna........

Who was it that said, you can't fix stupid!

Buy a 2 meter antenna, forget about trying to make something out of your
CB radio crap to save a couple of bucks.

What you could do is buy the ARRL antenna book and make a 4 element beam
antenna out of the antenna segments of the Ringo if you had a piece of
box tubing - antenna boom and a Gamma Match..




--
Channel Jumper


 
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