Question on splitting cable signals....

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If you do buy an amp, make sure you get one rated to amplify signals up to at least 900 Mhz, don't let someone stick you with an "old stock" amp which may only work up to 300 Mhz. You'll lose the higher channels with one of the old ones. (DAMHIKT)
Likewise with any cable you get, make sure it's rated for 900 Mhz too.
Happy New Year,
Jeff
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You could use a directional tap after an amplifier in the basement, feed the 3 sets from there and use your single feed for a signal to the upstairs with another directional tap or splitter for the rooms..
Just like real CATV - there is not a 16 way splitter at every corner in the neighborhood, there are taps with different attenuations as they get further away from the amplifiers.

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On 31 Dec 2003, Bill wrote:

Thepry and practice will be the same, as splitters are passive devices and the cable lengths will always come into play, as the distances will stay the same.
Each split is a 3.5 dB loss. A 4-way splitter is 3 2-ways in one enclosure (it splits once, then each split is split again) so you get a loss of -7dB on each of the 4 outputs. Finally, a 3-way (what it sounds like you have upstairs) is TWO 2-ways in one enclosure. It splits once and then ONE of those legs is split again, so your 3 outputs are not all equal, you have a "low loss out" (-3.5 dB) and two "high loss outs" (-7dB)
Yes, split everything at a convenient spot in the basement. Keep the existing 4-way that you currently have 1st in line, use three of those outputs and run them to the 3 sets farthest away from the split (your upper level rooms). The last output of the 4-way becomes the input to the 3-way that used to be upstairs, you can reuse it in the basement. Again, use the low loss leg to feed the TV farthest away from the split, and the two high loss outs will feed the TV's closest to the splitter.
If you count "splits in line between source and set" This is your current setup:
Downstairs 1: 2 Downstairs 2: 2 Downstairs 3: 2 Upstairs 1: 3 (low loss leg of 3-way) Upstairs 2: 4 Upstairs 3: 4 ...and this would be the new setup:
Downstairs 1: 3 (low loss leg of 3-way) Downstairs 2: 4 Downstairs 3: 4 Upstairs 1: 2 Upstairs 2: 2 Upstairs 3: 2
...same signal, just distributed better, getting more to the distant locations. HTH.
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Just thought I would mention, if you buy splitter at Radio Shack, the gold ones indeed have better specs than then cheaper ones.

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