[amsat-bb] Source for 3" (76mm) pipe for dish mount?

[Daniel Cussen]

I would second the idea of getting a local welder or engineering shop
to make up something suitable. If possible send it off for galvanising
which they can do too.

Note many of these larger dishes are not designed to use normal TV
LNBs but are instead intended to use special manufacturer feeds, and
they use unusual designs. Using the wrong feed will reduce the
results.

Here is information on the recommended installation in a fixed mount
including concrete base.

http://viasatelital.com/manuales/channel_master/channel-master-type-120.pdf

If you are not using it in a fixed position, but for low earth orbit
tracking on s-band, like I am, I can give more advice. I am using a
1.2 metre dish. In particular the modification for larger feeds,
calibration due to offset feed and real world low earth orbit tracking
problems.

If you can supply photos of links of the actual dish we may be able to
help further.