[TowerTalk] F12 C19XR Rivets

[Jim Thomson]

Date: Sat, 12 Mar 2016 10:53:02 -0600
From: Kevin Stover <kevin.stover at mediacombb.net>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] F12 C19XR Rivets

##  oops, should have read that a 2.75 inch short piece  used to splice the
3 inch to the 2.5 inch. 



##    On my f12  40m boom, they weld every 120 degs.... where the boom drops  from
3 inch od...down to 2.5 inch OD.    A short length  of  2.75 inch OD is slid over the end of the
2.5 inch tube.... then  welded every 120 degs.     So u end up with a stepped reduction,
and the boom drops from 3 inch  to 2.5 inch.   No taper used.   Then  1/4-20  SS bolts
and  SS nylocks used to bolts the 3 inch and 2.5 inch booms  together.   Where the bolts
pass through.... it’s a total of .375 inch thick material. 

Jim   VE7RF