This was in a 73 Magazine article, October 1980
https://archive.org/stream/73-magazine-1980-10/10_October_1980_djvu.txt
Model TM-Series
The Sky Needle series supports large amateur beams.
Hinged base mount included for concrete base.
Geared tele-scopic winch included.
Motor included with 70', 90' & 100' models.
Come to Tri-Ex for innovative tower design and
engineering! Our towers are famous all over the
world for their strength, stress and wind resistance.
Now you can buy a superior Tri-Ex tower at
FACTORY SAVINGS!
Choose your metal. Towers can be fabricated in
steel to ASTM Specifications with hot-dipped gal-
vanized finish (done after construction so that inside
surfaces are zinc-coated, too). Or in Triexium™, our
lightweight, corrosion resisting, high-strength light
alloy.
Tri-Ex HAM towers are available self-supporting or
guyed; take your choice. The W series of crank-up
towers, the LM series of crank-up/tilt-over towers
and the TM sky needles are self-supporting.
Use your charge power to buy your tower. Tri-Ex
honors Visa and Master Charge credit cards. If you
have questions about tower accessories or which
size tower is right for your antenna, call Bill Salerno,
his technical sales know-how is ready to serve you.
On Sat, Jan 23, 2016, at 09:50 AM, jimlux wrote:
> On 1/23/16 9:36 AM, Wilson wrote:
> > Good grief!
> > Get some 4’ scraps of pipe or rebar and drive them in!
> > Your problem will be pulling them out. We use a tractor and boom pole at
> > our FD!
> > We also use an electric demo hammer to drive them...pretty lazy!
> > If you go to dfma.org, you can see some of this happening in the picture
> > gallery.
> >
>
> That works great, if you're somewhere it's legal or permitted to drive
> things into the ground. There's lots of field day sites around where
> they're fine with you going there, but not fine with you driving things
> into the ground, or making alterations in the site (like a big parking
> lot). That's where various ballast and weight schemes are nice.
>
> _______________________________________________
>
>
>
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