[TowerTalk] Cushcraft XM240 stack distances

[Tim Duffy]

Hi Darrell:

I am at 185 feet over 120 feet for the two high W6NL Moxon stack for 40
meters here. If you use the heavy duty version (latest) that is on the K3LR
web site - the XM-240 element to boom clamps may fail. This happened to W9PA
this Spring and the damage was significant. The clamp sheared in 70 mph
storms. The W6NL Moxon antennas here at K3LR are not XM-240 conversions -
they are scratch built using DXE aluminum and G10 glass epoxy pates with DXE
clamps. The replacement Yagi at W9PA has G10 glass epoxy plates now (same as
K3LR) and should not fail up to 105 MPH winds.

73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of AB2E
Darrell
Sent: Wednesday, July 29, 2020 9:34 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Cushcraft XM240 stack distances

Hello all,
I have a 120ft Rohn 55G tower in the works.
I'm wondering if it's practical to stack a pair of XM-240 Cushcraft
antennas?
If anyone has this setup, what are your stacking distances?
I'm thinking top one at 120ft rotatable, and 2nd one at 60ft fixed on EU,
but might be able to get TIC Ring or similar.

I know K3LR has a stack of XM240s (Moxon mod) at 120 and 170ft, but I can't
go that high.

Your thoughts and comments appreciated,
73 Darrell AB2E

_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk