I'm guessing there is a lot of confusion in your post that makes it difficult to answer. The topic is the BUC, and the part number appears to be for the BUC, but there are 5 or so references to LNBs, which are not BUCs. Perhaps you can clarify, keeping in mind that the BUC is the transmitter, sometimes called the radio, and is the finned box that can be 1 or 2-watt. The LNB is the receiver, and is mounted near the top of the guide. Together, the LNB, horn, and BUC are referred to as a tria.
Generally speaking, the BUC and LNB do not care (or know) whether they are attached to a 4000, 4020, 6000, DW7000, or HN7000S.
There may, however, be geographical differences or satellite differences that could make the hardware for one location not work in another. For example the LNBs in the US have a local oscillator of 10.75GHZ, but it is possible that in other parts of the world you might need a 10.0GHZ local oscillator.
Motosat self-pointing dishes: 1.2-meter XF-3 on 93W, .74 meter G74 on 127W, SL-5 HD DirecTV|idirect 3100|Hughes HN7000S|Verizon UMW190 Air Card|1990 Blue Bird Wanderlodge Bus "Blue Thunder"|Author of hnFAP-Alert, PC-OPI and DSSatTool
grohgregDunno. Ask The Chief
Dawson Springs, KY
reply to psweber The issue sounds to me like the power adapter. It's the small black (or gray) box in the modem power cord. Its job is to convert AC mains power to the DC operating voltage and current levels to subsequently power the modem and the TRIA. Older two way equipment used a 45 or 54 watt power adapter, which many folks simply used after upgrading to newer equipment. The HN6000 and HN7000S require either a 64w or 80w power adapter, depending upon which TRIA they're used with. This is especially critical with 2 watt TRIAs (green tagged). See attached document.
HN7000S - 98cm Prodelin/2w "pure" Osiris - ProPlus - G16/1001H - NOC:GTN - NAT 18.104.22.168 - Gateway 22.214.171.124 - DNS 126.96.36.199 and 188.8.131.52 - Firefox 15/MSIE9 - AV/Firewalled by NIS2012