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AMO-2G13 continuity readings?

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N4RT
N4RT's picture
AMO-2G13 continuity readings?

Hello all,

I think I might have a bad AMO-2G13 omni antenna.  I've disconnected the cables.  Reading the continuity between ground and center pin on the vertical polarity connector, I read a dead short.  On the horizontal polarity side, I read an open... is this the normal condition?  Does anyone have one handy that they can check for me?

Has anyone opened up one of these antennas and have pictures of the elements that they could post?  Just wondering what this beast looks like inside.

73,

Ron N4RT
Bromley, AL

k1ky
k1ky's picture
AMO-5G13 Readings

I just checked my AMO-5G13 and the Vertical (left side) shows short and the horizontal (right side) shows open.  I believe I have an AMO-2G10 that I can check tomorrow.  I haven't opened one up to see how it is constructied.

N4RT
N4RT's picture
Thanks!

HI Tom,

Thanks for the info... that's just what I needed to know.  I imagine the construction is similar between the 2 Gig and 5 Gig antennas.  I thought maybe I had a problem there but probably not since yours measures the same.  Sure would like to open one of these up, though, and see how they are constructed.

73,

Ron N4RT
Bromley, AL

KG6JEI
Dual Polarity omni's are

Dual Polarity omni's are generally to my knowledge a slotted waveguide type antenna.  While it is not called out in the specsheet I would suspect that is the case with these antennas based on the pattern of the radiation signal in the spec sheets.

There is also some DC grounding done in antennas where the center may show a dead short to DC but to RF it is isolated. I often see WISP antennas with only one polarity DC ground.  I don't know the RF physics behind it off hand but its not unusual.

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