Hi,
Let me ask for forgivness in advance if this is not the right place to post this. I know just enough about electronics to be dangerous.
I have a lot of noise on my phone line and I am trying to design a band pass filter to block noise so hopefully my modem will run faster. From what I have been able to find on the internet dialup uses the frequency between 600-3000hz.
The following attached schematic is a design that, I was hoping with my limited knowledge on the subject, would allow the frequency band of 605-3014 to pass through. When I inserted this into the phone circuit I could not get a dial tone. I then tried just a high pass filter with a 4.7 cap connected to the green(+) line followed by a 56 ohm resistor connected in series and then the resistor connected to the red(-) line. This did reduce noise level somewhat but instead of the internet connection being faster it was slower.
Next I tried a low pass filter with a 16 ohm resistor connected to the green(+) wire followed by a 3.3 cap connected in series and then the cap connected to the red(-) wire. The modem would not connect with this setup.
Would anyone have any thoughts, ideas or suggestons as to what I am doing wrong or could you offer some things that I might try.
Where I live cable or dsl is not an option and I cannot afford satellite.
Thanks in advance for any help,
yeto
Let me ask for forgivness in advance if this is not the right place to post this. I know just enough about electronics to be dangerous.
I have a lot of noise on my phone line and I am trying to design a band pass filter to block noise so hopefully my modem will run faster. From what I have been able to find on the internet dialup uses the frequency between 600-3000hz.
The following attached schematic is a design that, I was hoping with my limited knowledge on the subject, would allow the frequency band of 605-3014 to pass through. When I inserted this into the phone circuit I could not get a dial tone. I then tried just a high pass filter with a 4.7 cap connected to the green(+) line followed by a 56 ohm resistor connected in series and then the resistor connected to the red(-) line. This did reduce noise level somewhat but instead of the internet connection being faster it was slower.
Next I tried a low pass filter with a 16 ohm resistor connected to the green(+) wire followed by a 3.3 cap connected in series and then the cap connected to the red(-) wire. The modem would not connect with this setup.
Would anyone have any thoughts, ideas or suggestons as to what I am doing wrong or could you offer some things that I might try.
Where I live cable or dsl is not an option and I cannot afford satellite.
Thanks in advance for any help,
yeto