[TowerTalk] Antenna spacing question

[Doug Renwick]

Jim,

"Delhi's are very limited as to what you can do with them."

If you are ever in windy, Saskatoon, Saskatchewan, give me a call I will
show you what can be done with Delhi towers, all guyed, and most heavily
loaded.  For example, I had a 132 foot guyed Delhi with a 4L KLM 40m 42
foot boom mounted on top for years before I took it down and replaced it
with a CC XM240.  A little twisting action in the tower, if guyed
properly, has not been a problem.  Another one of my Delhi towers, with
rotating top, has 5 beams - KLM 6L 15m, hb 5 L 10m, 6L 6m, 155CA, and
A3WS.  Never had a Delhi tower come down.

Doug 

I'll run the race and I will never be the same again. 
-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Thomson
Sent: January 27, 2010 8:26 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Antenna spacing question

I once had  a 204BA  mounted  11' above the same tower as his....
[ with one straight section added in the middle, and also guyed].... on
the  same 
1.9" OD  sched 80 pipe   [1976]   It also had  climbing steps  welded to
it ! 
It took  65 mph winds.... but I would never do it again. Climbing that
mast
freaked me out.  If he used the  bigger 2.275"  OD pipe in sched 80...
or
even the 2.875"  sched  80 pipe, [ .276" wall]  he would be ok,
depending on  local wind condx.   His  40m yagi may well  screw up his
15m array.  

I added  several more #5 straight sections of  Delhi.. [ right to the
72' top of tower]
and 12 x guys wires  [ 4 x per level x 3 x levels]    and then 2 x HB
monobanders... 
+ a prop pitch. 15m-26' boom    20m-36' boom.   Prop pitch was way down
inside the tower.
The top 2 x sections had a slight twist in em, after 68 mph gusts!
Delhi's  are very
limited as to what you can do with them.  I gave up on the delhi.. and
went to  30"  wide
commercial  L+R tower [ 350 lbs  per  20' section] ... and never looked
back. 

The Delhi's  were originally made for  deep fringe  TV  reception. [late
50's]
One large yagi, just above the top bearing.. and perhaps some smaller
stuff... 4-6' 
above that.... and it's  maxed out.  We had a local fellow here, who
overloaded
a  64'  delhi  [ no guys]  and it  folded right in half, during a
windstorm ! 
The 64' Delhi is rated for 3 sq feet.... NOT  10-15 sq ft. 

later... Jim   VE7RF