[TowerTalk] Shorty Forty Hose Clamp thread

[Patrick Greenlee]

There are "special alloy" rods for use with a standard propane torch 
that use no flux, emit no hazardous fumes, and will bond aluminum and 
many other metals and alloys.  These are dead simple to use and 
forgiving as to technique.

One approach would be to use hose clamps temporarily while adjusting but 
when ready then permanently secure the pieces.

If you want to permanently attach pieces of aluminum such that the 
electrical and mechanical integrity of the connection is secure in the 
face of vibration, moisture, physical stress, etc. then consider these 
special alloy rods.  I got mine at the state fair but I have seen them 
for sale over the internet.  Sorry, but I don't recall the trade name.

Patrick      NJ5G

On 8/11/2015 10:21 AM, Jim Thomson wrote:
>
>
> -----Original Message----- From: Billy Cox
> Sent: Tuesday, August 11, 2015 7:50 AM
> To: Doug Renwick
> Cc: George Dubovsky ; Robert Harmon ; towertalk ; Jim Thomson
> Subject: Re: [TowerTalk] Shorty Forty Hose Clamp thread
>
> Good Morning All,
>
> And despite a rather rude comment from Doug sent to directly to
> my email, here is a bit more information to HELP others perhaps.
>
> Again, we are using clamp products in applications that may not
> represent their common usage. So your mileage may vary, WFWL.
>
> Our website shows only the more popular common designs, not the
> special designs where the focus is on specific connection needs.
>
> Doug's "simple" install method does not take into consideration
> factors such as connection vibration nor repeated thermal cycling.
>
> Let's say for example, you must hire a crane to lift and install
> your new yagi. Once up there, you cannot reach the elements. If
> something 'comes loose', it will be additional time and expense.
>
> Now we have to make a critical decision:
>
> A. Use the "simple" method outlined below that does not follow the
> manufacturers instructions. It might work well, or it might not.
>
> B. Use the method and torque settings from the manufacturer and
> know you have followed the suggested install specifications.
>
> Would that be over engineering, or simply using common sense given
> risk of failure and related costs to repair the loose element(s)?
>
> 73 de Billy, AA4NU
>
> ##  I have never lubed a tridon SS hose clamp..ever.   If they are lubed,
> Im sure u would require less tq than rated..same as  SS bolts and A-325
> bolts, and SAE- G5 + G8 bolts.   All those have lower tq requirements
> when lubed with... never seize etc.... like only 60% of the dry rating.
>
> ##  I have never used anything more than a nut driver..cranked up tight.
> The problem probably starts when some one starts using  an open or boxed
> end wrench, in which case u can apply a lot more tq  vs a nut 
> driver.   Or using
> something like a .375 inch ratchet driver.
>
> ##  a tq wrench, in inch lbs would be the ideal ticket, then dial it 
> up dead on.
> One could also use a 2nd tridon SS hose clamp adjacent the 1st one, for
> a redundant setup.    Or dispense with the SS hose clamps..and use
> 3 x pop rivets like F-12 etc does.   Or  SS machine screws and SS 
> nylocks, etc.
>
> ##  at the telco I worked at, the outside plant folks used thousands 
> of SS hose clamps,
> the big ones like 4-6-8 inch types.  In some cases 2 x clamps are 
> joined nose to tail
> to increase diam.  None ever broke, but all were tightened with just a 
> nut driver.
>
> Jim  VE7RF
>
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