[TowerTalk] M2 40M3FS element tip problem

Peter Voelpel df3kv at t-online.de
Thu Aug 10 07:45:09 EDT 2006

Hi Scott,

Your problem is quite common with small diameter element tips.
Insert some rope into them and the vibration and element failure will stop.
I did that with my HyGain beams and have no problem anymore for 20 years.


-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of W3TX

I have a full sized M2 40M3 yagi at 120ft.  It's been up about 5 years.  The
distal element taper is aggressive, ending with a 3/8 inch diameter tip on
each of the six elements. Too small in hindsight!

The 3/8 inch element tips are failing (it appears from a vibrational
mechanism).  It's disconcerting tofind a 20 to 30cm section of aluminum with
the mower blade :-)

Q1). Has anyone else had this problem with the M2?

Q2). Has anyone else modeled and/or implemented a less aggressive taper
ending at 1/2 inch distal tips?

Thanks in advance...

73, Scott W3TX


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