Want this question answered?
Yes, a modulator is required if you use a RF cable to connect it to the TV.
A Philips RF Modulator PH61159 ca be purchased online from Amazon. Also, many online retail websites such as Walmart and Sears carry the Philips RF Modulator PH61159.
The video out from whatever source you have will go into the RF modulator which then screws into the back of the old TV.
RF Modulator - Convert video and stereo audio from an A/V component into a coaxial cable output Try radioshack.com
by un plug Rf -modulator which is seen on back side
You need to describe symptoms. Check oscillator frequency and power supply.
You need a RF modulator to convert the signal to a (RF) TV channel. The audio and video quality will be lower doing this.
Television signals are transmitted on a high frequency (or RF) carrier signal. The technique of adding the signal to the carrier signal is called modulation. This happens for all radio transmissions. A VCR that has a modulator allows the output signal to be turned into an RF signal. The signal is added to the RF signals that are fed into the VCR via the aerial feed. Although it is rarely needed today, older televisions often had no video or audio input so the VCR output could be sent to the television as RF to allow the tuner to capture and display the signal. Most VCR modulators have a control to adjust the carrier frequency to allow it to use a channel that is not use by other broadcast television signals. Modulators are used less often in recorders and players as virtually all televisions have at least one video input.
As rf modulators are usually mains powered convention says the standard cabling is easier to get
An RF modulator is a device that converts video and/or audio into radio waves for use with a television set. In the 1980's, many computers were produced which could be attached to an existing television set. If you were not using a separate monitor, then you'd need an RF modulator to convert the signals of the computer to work with a television. Nowadays, with the new television sets, such converters are no longer necessary, since most televisions now have some of the most common computer connectors and can attach directly using the correct cables.
AF modulator. Audio signals produced by the microphone get amplified enough with the power to modulate the RF carrier wave generated by a RF oscillator.
Because the output circuits of the modulator would otherwise present an impedance to the RF amplifier in parallel with the transmission line and antenna system, which you don't want. In other words, you want the RF all going up the tower, not down to ground through the modulator.