Hi,

Don't use the "black", that is not PVC but rather ABS.  When the sun hits
ABS it will bow due to it being black and the side of the pipe that is
directly exposed to the sun will expand causing a bow.  PVC that is gray is
generally used as electrical conduit and offers some characteristic that
greatly reduces static that might build up in a wire.  Pretty much any PVC
will work but I personally would paint it.  

Kent, KK4FFF, Clyde NC

-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Richard B. McDonald
Sent: Sunday, November 08, 2015 12:47 PM
To: [log in to unmask]
Subject: Re: Using PVC as a Frame for My 10M Full Wave Loop Antenna

Hi Tom!

thanks for this.  Right - "Schedule 40" PVC it shall be!  Incidentally, is
it grey?  Someone said to use the "grey" PVC for its UV resistance; and
another member of this list said to avoid the "black" PVC for its carbon
content.

As far as placement of the loop, I am planning just to place it atop my
shack's roof.  The roof is flat with a ~3% slant, and ~13' high.

73,
Richard KK6MRH

-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Tom Fowle
Sent: Saturday, November 07, 2015 5:44 PM
To: [log in to unmask]
Subject: Re: Using PVC as a Frame for My 10M Full Wave Loop Antenna

richard,
To clarify another post, you need to use "Schedule 40" pvc which is U.V.
resistant.

I'd think each segment of your loop won't be much more than 2 meters long.
I'd kind of doubt you'll need reinforcemment  for that relatively small
setup, but you could also use a few extra rope supports depending on how
you're going to support the loop.

There shouldn't be any; issue with running the wire inside the pipe, except
kind of a tangle while assembling everything on the long wire.

How do you plan to support the loop?

Tom Fowle WA6IVG
On Sat, Nov 07, 2015 at 05:14:52PM +0000, R Bernstein wrote:
> Use uv-resistant PVC.  Reinforce it inside with wooden dowels or 
> possibly 3=
> /4 inch PVC.
> 
> 73, Rick W3GWU
> ________________________________________
> From: For blind ham radio operators [[log in to unmask]] on 
> beha= lf of Richard B. McDonald [[log in to unmask]]
> Sent: Saturday, November 7, 2015 9:11 AM
> To: [log in to unmask]
> Subject: Using PVC as a Frame for My 10M Full Wave Loop Antenna
> 
> Hi!
> 
> 
> 
> So, I am planning to make my RX only 10M (28.4 MHZ) full wave loop 
> antenna into an octagon shape.  My wire is insulated 14 gauge stranded
copper wire.
> I intend to use ~1.0" diameter PVC pipe for a frame.  About PVC pipe, 
> does it matter if I 1) put the wire inside the pipe or 2) tape it to 
> the outside of the pipe?  I prefer putting the wire inside the pipe.
> However, are ther= e any RF interference issues with PVC?  Also, I 
> wonder how PVC will hold-up t= o the elements - particularly UV light 
> (sunlight)?
> 
> 
> 
> 73,
> 
> Richard KK6MRH