[TowerTalk] Tapering from 2" to 1 1/4"

[Richard (Rick) Karlquist (N6RK)]

You can use PVC sch pipe and fittings to make
a 2 inch to 1 1/4 inch transition.  Slit the
ends and insert the aluminum tubing, then clamp
with hose clamps.  Tape up the joint with aluminum
tape to make it conductive.  For the 1 1/4 inch
side, you might want to use schedule 80 if you
can get it.

Since "1 1/2 inch" PVC is 1.9 on the outside, you
can alternately have the 2 inch aluminum go over
the outside of 1 1/2 inch PVC and then transition
to 1 1/4 as above.

There are various ways to do this if you think
about it and spend some time browsing the plumbing
section of your hardware store.

Rick N6RK

> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com]On Behalf Of Steve London
> Sent: Thursday, April 29, 2004 6:26 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Tapering from 2" to 1 1/4"
>
>
> For an antenna project that I am working on, I need to go directly from 2"
> OD to 1 1/4" OD tubing, without any intermediate tapering.  I could put 5
> sizes of tubing inserts to make the jump.  Short of having a chunk of
> aluminum custom machined, is there a better way to do this ?
>
> Thanks,
> Steve London, N2IC/5
>
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