48 Ft Booms

[Frank Donovan]

Hi Gary!

Three years ago I was presented with an "opportunity" when a 100+ MPH
microburst damaged many of my antennas.  I took advantage of this
"opportunity" to rebuild all of them!  I was very surprised to discover
that 24 ft lengths of 3" diameter x 0.125" wall 6061-T6 aluminum tubing
were only about $50.00 each (I bought 20 pieces) delivered from our local
metals supplier.   I used two of these for each of my Yagis except the
rebuilt 40M beams, for which I used tubing with 0.188" wall.

The two pieces of tubing are spliced with a piece of 4130 chrome-moly 
steel tubing, cut down to 2.74" diameter on a lathe and galvanized.
You can purchase chrome-moly tubing relatively cheaply from Dillsburg
Aeroplane Works in Dillsburg, PA.  Lengths up to 9 ft are UPS shippable.

73!
Frank
W3LPL
donovanf@sgate.com


On Mon, 6 Jan 1997, Gary E. Jones wrote:
> I appreciate receiving the information on the 40 - 10 meter yagis that you
> recently posted. 
> 
> How do you going what you use... what kind of coupling arrangement do you
> use? 



--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 K7LXC@contesting.com
Sponsored by Akorn Access, Inc & KM9P