batdin
Full Member level 3
Hi,
I have the following problem:
I own an old TV set with 'hot chassis' without 'Video IN'.
To use it,I modulate the video signal with VCR.But the quality is compromised mainly because of the poor RF/IF parts of the TV set.
So I need to make a Video input.
I don't want to use an isolating mains transformer to separate the internal circuitry from the mains because it's bulky and let's say it is not a very elegant solution.
I tried to make an isolated circuit by optocouplers,but the problem was the limited frequency responce (leading to black and white picture).
Making an isolating transformer with freq. responce from 25Hz to 6MHz is clearly not possible for me.
Do you have other ideas to solve the problem?
Fancy chips are of no use because probably I won't be able to find them.
Thank you in advance!
I have the following problem:
I own an old TV set with 'hot chassis' without 'Video IN'.
To use it,I modulate the video signal with VCR.But the quality is compromised mainly because of the poor RF/IF parts of the TV set.
So I need to make a Video input.
I don't want to use an isolating mains transformer to separate the internal circuitry from the mains because it's bulky and let's say it is not a very elegant solution.
I tried to make an isolated circuit by optocouplers,but the problem was the limited frequency responce (leading to black and white picture).
Making an isolating transformer with freq. responce from 25Hz to 6MHz is clearly not possible for me.
Do you have other ideas to solve the problem?
Fancy chips are of no use because probably I won't be able to find them.
Thank you in advance!
