Convert Channel 3 (Coax) to Composite


New member
Username: Njaafari

Post Number: 1
Registered: Jul-10
Question: Is there an available family chip set that is used to convert the coax base-band to composite? I would like the chip to include audio (stereo if possible) as well as the composite video.

Recently my cable service provider has made the decision to go all digital. They are providing digital tuners for TVs that can only support analog signals (older TVs).

The digital tuner converts the desired channel (includes a remote) to analog channel 3 (or 4), coax output to connect to the television.

I currently have a projector that is connected to an old VCR, that I use as a tuner. The VCR's composite connection is used to connect to the display.

I want to replace the VCR all together by making my own down-converter and coax to composite converter. Since the frequency of channel 3 is in the low-VHF (56-ish MHz) range, it shouldn't be too difficult to design the down-converter to isolate the base-band.

Thanks in advance for the information!

Gold Member
Username: John_s

Columbus, Ohio US

Post Number: 2746
Registered: Feb-04
You want to build one yourself? Good luck.

Might be easier to buy a demodulator like this.
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