[TowerTalk] Reassembling a Tennadyne T-12

[Larry]

Force 12 used 3 rivets per joint on the elements and 4 on element to boom 
plates in general. The rivets worked OK on the elements and were spaced 
about 1.5" apart as I recall. The boom to element plates were spaced more 
like 2". I had trouble with the boom to element plates on a 40M 2 EL and 
switched over to SS bolts. I had the rivets on the boom to element plates 
drop off twice before I switched to bolts. Makes a mess of elements after 
falling 120 feet.

73, Larry  W6NWS

-----Original Message----- 
From: EZ Rhino
Sent: Sunday, December 27, 2015 7:00 PM
To: Towertalk Reflector
Subject: Re: [TowerTalk] Reassembling a Tennadyne T-12

Hi Vincent,

They don't use sheetmetal screws anymore; they use machine screws and nylock 
nuts.  The sheetmetal screws were used a LONG time ago.  Perhaps your second 
hand model is one of these old ones.  I don't see any reason why rivets 
wouldn't work, but I would use more than one (probably three per joint).  It 
will be more work to use rivets, as you'll be drilling more holes, rather 
than one through hole and using machine screws/locknuts.

Chris
KF7p





On Dec 27, 2015, at 16:55 , Vincent Weal wrote:

Hello all,

I bought a used Tennadyne T-12 LPDA, and am planning to reassemble and
install the antenna soon. From what I've heard these antennas sometimes
have a nasty habit of shedding the sheet metal screws that hold the tubing
for the elements together, then eventually shedding the tubing. To prevent
this I'm considering losing the screws, and instead using pop rivets à la
Force 12. Does this sound like a reasonable modification? Has anyone else
done this, and can a supply of pop rivets be purchased from Force 12?

73, Vince K4JC
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