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Old November 15th 06, 12:15 PM posted to rec.radio.amateur.antenna
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Posts: 326
Default Terminating a Rhombic

Rick, you haven't told us where you are and what the heading is down
the center of the vee///

I have noise between me and europe - 45 degrees from mid Michigan and
right through the edge of the auroral zone sob) on my switchable
arrays - this is on 80 meters...
Beaming NW is the quiet direction...
NE is the noisy I mean really frying, esp. in dry weather...
SE and SW are intermediate except when there are storms in a particular
direction...
A few days ago when there were massive storms over Texas area the SW
array was the noise champ; 30 over blasts with a steady S9 roar... On
a relative basis EU was quiet that night...

denny / k8do

Rick wrote:
That length is almost 3 wavelengths at 20m, and should definitely show
gain.

It is essentially the first half of the rhombic from the Antenna book.

How high is the vee compared to the yagi? Are the wires uniformly high
or do they slope?

Vee is at 35 feet at the feed, and 25 ft at the ends (corners when it is a
rhombic).
Yagi is at 40 ft.

What is the angle between the two legs?

52 degrees, equivalent to a 64 degree tilt angle when it is a rhombic
(maybe tomorrow),

Are you feeding it with open wire line? If so, that could be picking up
noise depending on where you route it and your local noise sources.

Yes.


 
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