LNB info

DG0OPK.darc.de has details of the Octagon LNB with the 25MHz single crystal that I use in my LNB for Es’Hail-2 satellite system. This is supposedly the low cost LNB using the RT320m PLL chip in the OTSLO twin LNB. It looks like there is lots of info on this LNB and others on the uhf-satcom.com web page links. 

I did notice that a lot of the published info, on modifying these LNBs, refers to the version with the 27MHz crystal. Apparently, several of these have two  crystals and two PLLs. The Octagon PLL LNB i have only has the one crystal (25MHz) and it easy to modify. The first visible difference, inside, is that the ones with the 25MHz crystal has red solder resist, whilst the 27MHz version has green resist. Of course, this doesn’t help from the outside!

I haven’t checked but the 25MHz ones (which might be the ones you can drive with a 24MHz reference for a better (higher) IF) have a code 1609 instead of the 1306

It’s all a bit of a minefield when ordering!!!!!!!,