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
Likewise with any cable you get, make sure it's rated for 900 Mhz too.
Happy New Year,
Jeff Wisnia (W1BSV + Brass Rat '57 EE)
"If you can smile when things are going wrong, you've thought of someone to
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.
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
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.
Baisez-les s'ils ne peuvent pas prendre une plaisanterie
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