----- Original Message -----
From: "j.a.hermans" <j.a.hermans@skynet.be>
To: "Jim W7RY" <w7ry@centurytel.net>
Cc: <towertalk@contesting.com>
Sent: Saturday, March 22, 2003 1:22 AM
Subject: Re: [TowerTalk] mechanical construction of 80m vertical
> Dielectrical antenna for 80mm ?.....but usualy its a horizontal
> polarization.
> Or should it be metalized pipes? What about skin effect on 80 Meter,
power
> handling and HV on some part ?
> Might be a STEPIRR on 80 project ?
>
> 73's jos
>
> ----- Original Message -----
> From: "Jim W7RY" <w7ry@centurytel.net>
> Cc: <towertalk@contesting.com>
> Sent: Saturday, March 22, 2003 1:01 AM
> Subject: Re: [TowerTalk] mechanical construction of 80m vertical
>
>
> > A plastic vertical ?
> >
> > Hmmmm... What were you going to use for a radiator ? Put a piece of wire
> > inside of it?
> >
> > The "weld" of PVC conduit is stronger than the pipe itself. It makes the
2
> > pieces of plastic pipe 1. The US has been using plastic PVC gray conduit
> for
> > years!.... Great stuff!
> >
> >
> > Good luck!
> > 73
> > Jim W7RY
> >
> > ----- Original Message -----
> > From: "Chris BONDE" <ve7hcb@rac.ca>
> > To: "Jim Hill" <w6ivw@cox.net>
> > Cc: <towertalk@contesting.com>
> > Sent: Friday, March 21, 2003 3:43 PM
> > Subject: RE: [TowerTalk] mechanical construction of 80m vertical
> >
> >
> > > I have been unable to find a supplier of irrigation tubing within a
> > > reasonable distance.
> > >
> > > The other metal tubing that I have been trying to find out more about,
> > and,
> > > in some cases have found that they are good but expensive, are;
> > electrical
> > > conduit used for the stack, ie that part above the roof line ($$$$$),
> > > industrial grade top rails for chainlink fencing, looks good but
> shipping
> > > the problem for me 20ft lengthas about CA$30 a length, the last was
> custom
> > > automobile exhaust tubing, comes in various sizes, can be welded
> together
> > > or flared. Should be galvo on the inside as well.
> > >
> > > The other one that took my notice was the new plastic electric
> > > conduit. Have to use the large diameter to obtain wall thickness and
> > donot
> > > use the coupling, use a length of the main pipe as a splice or spint
> over
> > > the joint. I was wondering about plastic welding, is that as strong
as
> > the
> > > main pipe as it is in steel pipe welding?
> > >
> > > Chris opr VE7HCB
> > >
> > >
> > > At 02:45 PM 2003-03-21 -0800, Jim Hill wrote:
> > > >Finding tubing isn't easy. I've stopped at a number of businesses in
> > > >farming areas with little luck. plastic tubing seems to be currently
> > used.
> > > >However, the following store in Bakersfield CA is a good choice:
> > > >
> > > >The Irrigation Store, 4001 State Road, Bakersfield, CA 93303
661-4421
> or
> > > >800-742-7246. Their web site is: http://www.rainforrent.com/ Their
web
> > > >site shows tubing with end connections, but I thought I saw just
plain
> > > >pipe when I visited them. The web site also shows stores at other
> > locations.
> > > >
> > > >73's Jim
> > > >_______________________________________________
> > > >
> > > >See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless
> > > >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041
with
> > > >any questions and ask for Sherman, W2FLA.
> > > >
> > > >_______________________________________________
> > > >TowerTalk mailing list
> > > >TowerTalk@contesting.com
> > > >http://lists.contesting.com/mailman/listinfo/towertalk
> > >
> > >
> > > _______________________________________________
> > >
> > > See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless
> > Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any
> > questions and ask for Sherman, W2FLA.
> > >
> > > _______________________________________________
> > > TowerTalk mailing list
> > > TowerTalk@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/towertalk
> > >
> >
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
|