General purpose audio input and output transformers for low power amplifiers

LINE OUTPUT TRANSFORMERS are available for the various types of amplifier commonly used. These are push-pull, single ended, and ac coupled either taking the output from a cathode follower or SSRP or as a parafeed arangement from the anode. In the case of the PP or SE transformers a step down ratio is used to lower the output impedance as a trade off with the output voltage level. It is always a good idea to have a low output impedance to drive the line capacitance and Miller capacitance of the power amplifier.

"600 OHM" BALANCED LINES are used almost universally in recording, broadcasting and most large installations where analogue signals need to be fed from one piece of equipment to the next. The balancing and isolation virtually eliminates ground noise and unwanted signals which can be induced into cables. Transformers are a very effective means for converting unbalanced signals to balanced as well as providing almost complete isolation from ground noise. A further benefit of using balanced lines is the elimination of unwanted "pops" and "bangs" when signals are switched. Many HiFi enthusiasts are now using 600 ohm lines as their equipment becomes more complex.