Pre-Web Satellite Resources

[gordon_s1942]

I remember reading that LNB's only had one Polarity to begin with and when dual polarity was introduced, I am sure there was a mechanical arrangement available to do this but I dont know how it functioned other than it physically rotated the LNB through 90 degrees.
I have an LNB made by Digi-1 AUST for Austar type No AE29 that says its a single output, 12.25 to 12.75 GHZ.
Now whether that means single POLARITY I have no idea but its sure old.

A couple of those LNB's look very similar to those used on the Satellite Internet program.
One is for Rx and the other is for Tx I believe.

[tristen]

I remember reading that LNB's only had one Polarity to begin with and when dual polarity was introduced, I am sure there was a mechanical arrangement available to do this but I dont know how it functioned other than it physically rotated the LNB through 90 degrees....

It's called a polarotor. See

[irritant]

I remember reading that LNB's only had one Polarity to begin with and when dual polarity was introduced, I am sure there was a mechanical arrangement available to do this but I dont know how it functioned other than it physically rotated the LNB through 90 degrees.
I have an LNB made by Digi-1 AUST for Austar type No AE29 that says its a single output, 12.25 to 12.75 GHZ.
Now whether that means single POLARITY I have no idea but its sure old.

Single output means just the one cable coming out/exiting from the LNB, i.e. a single LNB (vs dual, quattro, octo, etc.).

Yep, many times they had to be adjusted by hand, through 90° to get the "other" polarity. I read a guide a year or two ago from the 90s instructing owner's of the HACBSS antennas how to change their LNB polarity for some channel in the Central Australian Optus B footprint or national footprint that was changing from V to H.

A couple of those LNB's look very similar to those used on the Satellite Internet program.
One is for Rx and the other is for Tx I believe.