Eliminate clicks when turning the equipment on and off. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Audio equipment
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In some types of tape recorders, when you turn them on and off from the network, a strong low-frequency signal (click) occurs. This signal, when the power amplifier is turned on, can lead to the failure of the speaker systems. The analysis showed that interference occurs when the voltage rises and falls in the power supply stabilizers. In the electrical circuits, no measures have been taken to achieve the synchronism of these processes.
To avoid clicks, I recommend connecting the UMZCH to tape recorders through an intermediate relay.
The device can be powered both from tape recorders with Upit = + 15 V (for example, "Mayak"), and from autonomous power sources. A relay of the RES-43 type was used (passport RS4.568.201 or RS4.569.202). You can also use a relay type RES-60 (passport RS4.569.436 or RS4.569.438).
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