early PLL pictures
Many thanks those who gave me early pictures of the LNBF without its plastic shell.
That was necessary to formulate a plan on making it into an LNB.
Attached, are a couple of pictures of my own.
In some LNBFs, the scalar has a flat back, and you can just machine off the rings, drill holes in the remaining disc, and bolt it on.
That is true of the prime focus LNBF from SatAV, (the
SL1P, as shown by another SatGuys mamber), but may not be so of more traditional parts.
The
SL1PLL feedhorn, has a cone shaped back side.

That meant taking off the entire feed, leaving only the "pipe".
As you can see, the "neck" or pipe between electronics proper, and the feedhorn, is very short.
That killed my first idea: threading the neck, as was done by another clever member.