"Tony Hwang" wrote in message
news:hpDCe.1976541$6l.143903@pd7tw2no...
Joseph Meehan wrote:

Walter R. wrote:

My house is 22 years old and was wired with RG 59
coax in the walls.

I ran into a problem with my RG 59 cables because
they had too much
signal-loss for my cable modem.

I will have to replace the RG 59 with RG 6 for the
cable modem. Do I
need RG 6 for HDTV or will HDTV work with RG 59
coax? (Hate to run
more wires through walls than absolutely necessary.)


I have RG 59 and no problems with my cable
modem. I guess it depends. I do suggest top quality
splitters. The ones usually available to the
general public are junk. My RG 59 carries HD just
fine.

Hi,
I think your cable provider was sending weak signal.
Don't blame the coax cable.
Tony

What everyone's forgotten, or doesn't know, is that
coax has a specific impedance, which must be matched at
any connection to it. Regardless of the RG number, if
you don't match the impedances there will be signal
loss. The TV will have an antenna input impedance.
Coax has its own impedance. If it's not the same as
the equipment it's connected to, an impedance matching
device (often called a splitter, not always) must be
used. Typical impedances are 45, 75, 90 ohms and so
on. It's NOT something you can measure with a standard
multimeter - go by each product's specs.

HTH,

Pop