timo_w2s
Retired Mod
- Joined
- Sep 28, 2005
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- My Satellite Setup
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- Maidenhead, UK & Helsinki, Finland
I did a quick unscientific test to compare a few twin and single Inverto Black Ultra LNBs, posting the results here just in case it's of interest or use to someone.
Signal quality for a 60cm dish in Helsinki looking at Astra 1 (19.2E) on a Dr HD F15 for two twin output and three single output LNBs.
10.729V 11.244H 12.728V
-----------------------------------
TWIN 14.4dB 12.5dB 13.5dB
TWIN* 14.1dB 12.6dB 13.7dB
SINGLE 14.7dB 12.5dB 10.2dB
SINGLE 14.4dB 12.3dB 9.8dB
SINGLE 14.7dB 12.5dB 9.5dB
</pre>
<p>I should have done a few more frequencies but I didn't have much time but from this small bit of data it looks like the twin output LNBs work significantly better at the high end while the singles all dropped off a few dB. The singles also seemed to work very slightly better on the lower band.
*The second Twin in the list had been used for 18 months, the other LNBs where all brand new.
Signal quality for a 60cm dish in Helsinki looking at Astra 1 (19.2E) on a Dr HD F15 for two twin output and three single output LNBs.
10.729V 11.244H 12.728V
-----------------------------------
TWIN 14.4dB 12.5dB 13.5dB
TWIN* 14.1dB 12.6dB 13.7dB
SINGLE 14.7dB 12.5dB 10.2dB
SINGLE 14.4dB 12.3dB 9.8dB
SINGLE 14.7dB 12.5dB 9.5dB
</pre>
<p>I should have done a few more frequencies but I didn't have much time but from this small bit of data it looks like the twin output LNBs work significantly better at the high end while the singles all dropped off a few dB. The singles also seemed to work very slightly better on the lower band.
*The second Twin in the list had been used for 18 months, the other LNBs where all brand new.