the short version:
Well, your General Instruments 2400 could be used to run the motor and skew the servo on your existing feedhorn, or . . .
Motor controller: Sadoun Gbox v3000, link in my signature, review in our Hardware Review department.
Controlled by a modern DVB FTA receiver.
Modern voltage controlled LNBF: CK-1 available at Sadoun or SatelliteAV, or DMX741 from WSI.
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These LNBFs are a little touchy to adjust for Ku reception, but many have mastered them.
Hole size on the BUD is generally recommended as being small enough to not pass a #2 pencil.
If you have a "perforated" dish (
round holes punched in a sheet), then that test may be appropriate.
However, "expanded mesh" dishes may have diamond-shaped holes, and if the long direction is larger than the pencil, they might have reduced Ku reflectivity.
Give it a test and see.
There's a better feedhorn solution for a lot more money.
It's called an orthomode feed. eg:
ADL or
Bullseye II.
It takes two original style C-band LNBs, and two Ku-LNBs.
They are generally easier to fine tune, and will perform a little bit better.
Cost for feed, lnbs (from cheap to exotic), and a multiswitch to hook them all together could range up to $500 or $700 or more for new.
Lots less for used, but still a couple hundred dollars.
I'm not recommending, just trying to paint you the whole landscape.
Hopefully, others will add their suggestions and opposing views.
