The discussions in the previous chapters have been limited to the three primary components of the vibrator power supply system and to the influencing factors of the applications in which a majority of the vibrators are used.

Perhaps it should be pointed out at this point that when using the primary timing capacitor the wave-form will have one additional characteristic not illustrated.

Typical curves are included in this text for the purpose of providing reliable technical information for use in making calculations.

The transformer core steel most often used in vibrator transformers are limited to four grades. These grades are usually designated by their specified core-loss characteristics as expressed in watts-per-pound, at a flux-density of 10,000 Gauss and 60 cycles-per-second frequency.

In order to stabilize the circuit and suppress this spurious oscillation, a resistor is placed in series with the secondary timing capacitor. The value of this resistor must be such that the critical damping resistance of the unwanted LC circuit is exceeded, while the critical damping resistance of the desired LC circuit is not reached.

The vibrator starting characteristics are quite important to the transformer but are often neglected. A serious transient condition may be imposed on the transformer by the vibrator during the first few cycles until the full operating frequency of the vibrator is attained.

The transformer used in a vibrator power supply is a very important and critical component. As one of the three principal components (the other two being the vibrator and the timing capacitor), its design and performance can control the resultant vibrator performance.

The selection of the most suitable vibrator can be made with relative ease. Most of the factors which govern this choice are controllable or are known at the beginning of the design work.

Time intervals "ti" and "t3," as before, represent the contact-closure time for the interrupter portion of the vibrator.

There are two audio channels for sound generation. They are identical but completely independent and can be operated simultaneously to produce sound effects through the TV's speaker.