Hi Everybody,
Here goes a somewhat "difficult one":
I need a single polarity feed (part number 6777) for a 1.80 m prime focus / 4 petals Channel Master.
Bought in 1993, it is not made anymore and no spare parts seem to be available, according to Channel Master themselves (not very friendly at Pforzheim...).
Actual configuration: 0.6 wideband WR75 Gardiner LNB and mechanical polarizer with Echostar 7000 (model 3000 until 2001); very performing: in 1999 it was able to receive most Astra digital signals in Istanbul whereas most people needed 3 meter dishes and in Budapest, where I am for the moment, I almost get the V signals on Astra 2D (blocks, no more).
I would like to experiment with other LNBs but therefore, need that single one:
1) there was an article in the 12-01/04 issue of Telesatellite International on the REISAT servo polarizer (very expensive: € 1000 !) which rotates with a side - mounted servomotor
2) the same article tells us that, for extreme reception, mechanical or magnetic polarizers, "have disadvantages: in the wave - guide, or just behind it, antenna wires, coils and ferrite magnets can be found: longer signal paths and mismatching which are deadly for digital signals, are the result and there is the additional chore of aligning the small dipole in the wave - guide with the actual polarization plane from the satellite, since there is no fine skew adjustment available":
so, a test with a good C 120 LNB could be made (by the way: SMW offers a "quarterwave transformer", enabling the use of WR 75 with C 120)
Does anybody know where to find this feed or, who could make one ?
Moreover, does anybody have experience with the Astrotel 0.5 dB wideband WR 75 LNB ?
Thanks.
Here goes a somewhat "difficult one":
I need a single polarity feed (part number 6777) for a 1.80 m prime focus / 4 petals Channel Master.
Bought in 1993, it is not made anymore and no spare parts seem to be available, according to Channel Master themselves (not very friendly at Pforzheim...).
Actual configuration: 0.6 wideband WR75 Gardiner LNB and mechanical polarizer with Echostar 7000 (model 3000 until 2001); very performing: in 1999 it was able to receive most Astra digital signals in Istanbul whereas most people needed 3 meter dishes and in Budapest, where I am for the moment, I almost get the V signals on Astra 2D (blocks, no more).
I would like to experiment with other LNBs but therefore, need that single one:
1) there was an article in the 12-01/04 issue of Telesatellite International on the REISAT servo polarizer (very expensive: € 1000 !) which rotates with a side - mounted servomotor
2) the same article tells us that, for extreme reception, mechanical or magnetic polarizers, "have disadvantages: in the wave - guide, or just behind it, antenna wires, coils and ferrite magnets can be found: longer signal paths and mismatching which are deadly for digital signals, are the result and there is the additional chore of aligning the small dipole in the wave - guide with the actual polarization plane from the satellite, since there is no fine skew adjustment available":
so, a test with a good C 120 LNB could be made (by the way: SMW offers a "quarterwave transformer", enabling the use of WR 75 with C 120)
Does anybody know where to find this feed or, who could make one ?
Moreover, does anybody have experience with the Astrotel 0.5 dB wideband WR 75 LNB ?
Thanks.