Hello,
I just joined the forum. Just replaced my (unmodified) OCTAGON LNB with the DB6NT LNB and it is a difference like day and night concerning the frequency stability listening to the beacons. After 30 min no relevant drift, thus 100% suitable for "normal" users. The Qctagon LNB was always drifting a little bit even after 24h on power supply and no significant change in temperature.
I used the Octagon LBN to adjust my 85cm offset dish to BADR 4 postion (near the final Es Hail Sat postion 26°). Unfortunately the TV transponders of BADR 4 which are not "covered" by same QRG-transponders of Astra 2 can not be received (with my receiver) with the Kuhne LNB (these transponders start just below 12 GHz). (I reveive a few strong "lower frequency" transponders from ASTRA 2 even pointing on 26° E but that's due to my "small" dish)
The beacons in the moment seem to TX in H and V polarisation simultaniously (is this right ?) , thus I could not realy adust the skew angle right now (took -13 degree like for BADR4). But when the Amateur transponder beacons with H or V polarisation are online. the fine tweaking can begin.
73 de Johannes DL5RDI / AC2TR