F-12 antennas are pre drilled at the factory. The instructions with mine say
if there are 3 holes, use 3 rivets and insert all 3 rivets in the holes and
don't pull any of them until you know all 3 line up. If they don't line up
you probably have that particular element reversed.
On some of the driven elements they drill a 4th hole in case you need to
adjust the SWR and on these elements only 3 of the 4 will line up. My
instructions didn't say anything about a 2 rivet rule.
If you still have 2 out of 3 rivets,insert a new one. Not sure what kind of
failure you had. Did the problematic rivet fall out, did it get pulled all
the way through? Just put a new one in.
73
Chet N4FX
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of n8de@thepoint.net
Sent: Friday, February 18, 2011 9:38 AM
To: Barry Gross
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Force12 rivets
I believe that the rule is:
put two rivets at each location .. perpendicular to each other.
Someone told me that in the past.
73
Don
N8DE
Quoting Barry Gross <n1eu.barry@gmail.com>:
> I'm not sure if Force12 still uses riveted construction of yagi elements.
> In any event, I just experienced my first rivet failure on my C3S (great
> timing, huh?) and would like to avoid repeating this experience. What is
> the tried and true wisdom on preventing rivet failure on these antennas?
>
> Thanks & 73,
> Barry N1EU
> _______________________________________________
>
>
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