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Message: <blockquote data-quote="s-band" data-source="post: 1051886" data-attributes="member: 407744">The Norsat, XMW and MMCLuster PLL LNBs all appear to be similar so there may be one OEM for many DROs as well. I started off with a Gilat band B which is about 3dB down by 18.5GHz and needs an IF tuner that goes down to 250MHz (TBS6983). That could not always lock the main ITN feed on 18557. Thanks to 2 members who gave me their water damaged XMW & MMCL PLLs, I created one good LNB out of the 2. There's a cautionary note - the XMW etc PLLs need a rain cover!With the Frankenstein LNB on a 1.2m offset dish most feeds will lock most of the time. The levels vary quite a lot and some are down to 7dB SNR at times. Here's the electronics block for Ka A which has a servo for polarisation control. I think that the feed was made by Patriot. I'm not sure if it is perfectly matched to the 0.8f/d dish but it works fine.</blockquote>