Antenna Types

Probably because Petrol engine vehicles may have more electronic gadjetry which may interfere with UHF signals? Dunno. just a guess in the early morning :o)

That's a good one. I can't think of a reason apart from the diesel vibration shaking it to bits, must be something more obscure than that. Why not email them for the definitive answer.

I know that the GME AE609L?, the three piece multi db antenna kit is unsuitable for bullbar mount through experience. Mine kept breaking on corrugated roads, when I returned it they said it shouldn't be on a bullbar, I asked 'why not not state that in your instructions?'

Just got a return email from the supplier, it is a vibration issue. what parts vibrate appart? Does the thread come appart? Could this be solved with a drop or two of loc-tite? Or would that affect conductivity?

Will,

Which aerial are we talking about here? There might be a member that already has experience with the particular aerial and might be able to give some feedback.

If it's one of the stainless wire ones with the coil half way up (raw or powdercoated) they tend to snap at the base from metal fatigue after lengthy subjection to vibration.

Doesn't matter the cause of the vibration, rough vehicle or rough road. I know of at least two or three that snapped at the base.

Having said that, I use one. I had a spare element which I had never used and gave it away.

The vibration is probably accentuated by the ground independant bases that are so common on bull bar mounted UHF antennae in the past few years. The mass of the GI base oscillating on the spring base would increase the distance that the base of the element oscillates back and forth - I would have thought.

Anyone remember their HSC physics?

Dave

CD900 Rugged Elevated Feed 6.5db Antenna
# Ideal for 4WD, heavy transport, mining or industrial uses
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From presitge communications web site, design negates all breakage reasons above