No rf output, good modulation - Cobra 148 GTL 120-Channels Base CB Radio

You need an A/V to RF adapter to convert the audio and video outputs of the DVD player to RF so that you can watch the DVD player on an available VHF channel on the TV. See this device offered by Amazon:
RF Modulator TV Switch Audio Video RCA Ant Input to Type Coax Output...
You may also need a short 75 ohm length of coaxial cable with "F" type connectors on both ends and A/V cables with RCA plugs to complete the setup.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/dave_fb2c45146b845cea

Hi Lisa can you provide some more information
What is the model number and make of the rf modulator?
what wii output did you use to go into the rf modulator ?
what frequency does the rf modulator output at ?
What model number and make is the television ?
What type of cable is being used from the rf modulator to the tv ?
Is it a video cable or a proper 75 ohm impedance coaxial cable
what is the impedance of the rf modulator output is it 75 omhs and what is the impedance of the tv is it 75 ohms or is it 300 ohms if it is 300 ohms on the television ( usually antenna is a ribbon cable screwed onto the back of the tv rather than a coaxial socket ) different you need a balun
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I am recommending your first point of problem trouble shooting first is to check the impedance of your television compared to the impedance of the rf modulator and compared to the impedance of the cable used. IF they do not match then power is lost and the signal won't get to the TV.

Some VCR's have the ability to switch off the RF output. You should look under the tuning menu of the VCR.

Instructions

Connect one end of your coaxial cable to the output port on your SSB Transmitter. Connect the other end of the cable to the coaxial input port on your RF demodulator.

Connect one end of your 1/4 inch audio cable to the audio output port on your RF modulator. Connect the other end of the audio cable to the audio input jack on your amplifier.

Turn on your SSB transmitter, RF modulator and amplifier. Adjust your SSB transmitter modulation by adjusting the knob on your RF

Adj VR1 next to VR2 they are in the center of the main motherboard. VR1 will allow you to adj the S meter in AM mode only.

is it steady output on AM with no modulation swing. then change the Audio transistor. SSB should work. they feed straight through to rf final. if no modulation on either mode, then check the mic, audio ic preamp.

What type of Inputs do you have on your TV. (ANT IN, S-Videio, RCA Video,RCA Audio)

If you only have a ANT In or RF Coaxial hook up you will need a RF Modulator

The RF modulator probably had a red, white, yellow trio of RCA jacks (A/V jacks), a coax jack marked "antenna" and another coax jack marked "TV"

Putting the DVD output to the A/V jacks allowed it to play out to the TV, which couldn't otherwise accept the DVD player.

The satellite box probably has coax and a/v jacks as output. Use the coax as output to the antenna input of the RF modulator, and the A/V jacks of the DVD player to the A/V jacks of the RF modulator. Hopefully the modulator allows the A/V jacks to have priority over the coax input, so that when the DVD plays it "wins"

The RF modulator changes the outputs from RCA (red, white, and yellow) to a Coaxial Cable (COAX).

You connect the DVD players RCA outputs to the RCA Inputs on the RF Modulator, then connect the COAX Output from the RF Modulator to the television.




Best of Luck.