[TowerTalk] Fwd: Antennas in trees

[Hans Hammarquist]

Should be stamped right on the side of the pipe. If it states "no pressure" it is not to pressurize. They are usually also stated as "foam core". A 4" non-foam core may state "220 psi as 68 F". Also check the reducers. The package (where it is sold) states how much pressure, if any, it can operate under.


Also remember: The safety requirements are different for tanks made for pressurized liquid contrary to pressurized gas (such as air). The damages from a ripped gas (air) tank is much more severe than from a tank filled with liquid.


Hans - N2JFS



-----Original Message-----
From: n0tt1 <n0tt1 at juno.com>
To: TowerTalk <TowerTalk at contesting.com>
Sent: Sun, Aug 2, 2015 11:58 pm
Subject: Re: [TowerTalk] Antennas in trees


70 PSI.  Yes, but look out!  Some PVC pipes like Drain & Waste
pipes are not
rated for pressure.   Just sayin'.

73,
Charlie, N0TT

On Sun, 2 Aug 2015
19:30:33 -0500 "Gary J - N5BAA"
<qltfnish at omniglobal.net> writes:
> We took an
15 inch section of 3 inch PVC and with reducers necked it 
> down to 
> 1 1/2
inches in the back and installed a rubber tire valve in it.  
> On the 
>
front we reduced it down to 3/4 inches and installed a 3/4 pvc valve 
> which

> was then reduced to 1/2 inch PVC  for about 18 inches for a barrel.  
> At

> Walmart they have 3/4 ounce STEEL egg fishing weights that fit 
> perfectly

> down a 1/2 inch pvc pipe.  Pressurize the chamber, mount an old 
> Zebco
reel 
> under the barrel with the line through the weight, aim and shoot.  I

> can 
> shoot the weight 100 yards on 70 psi.  Email me for pics of my gun. 

> There 
> is an ad in the last couple of pages of QST for a commercial
model.
> 
> Gary J
> N5BAA
> 
> -----Original Message----- 
> Sent:
Sunday, August 2, 2015 6:42 PM
> To: Mike Fahmie
> Cc: towertalk reflector ;
Mike Ryan
> Subject: Re: [TowerTalk] Antennas in trees
> 
> Page not found
message.
> 73, Mike NF4L
> 
> 
> > On Aug 2, 2015, at 5:49 PM, Mike Fahmie
via TowerTalk 
> > <towertalk at contesting.com> wrote:
> >
> > Here's Alan's
price list, use the one appropriate to your QTH;
> >

>
http://akbeng.com/catalog/california.htmlhttp://akbeng.com/catalog/mainla
nd_usa.html-Mike-WA6ZTY
>
>
> >      From: Mike Ryan <mryan001 at tampabay.rr.com>
> > To:
> > Cc:
Towertalk Reflector <towertalk at contesting.com>
> > Sent: Sunday, August 2, 2015
11:25 AM
> > Subject: Re: [TowerTalk] Antennas in trees
> >
> > Interesting
launcher...could not find anywhere on the website WHAT 
> THEY
> > COST. I
guess if you have to ask, you can't afford it?  -M
> >
> >
> >
> >
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