DYNACO Stereo 70 Посібник з реставрації - Сторінка 2

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Dynaco Stereo 70 Power Amplifier

Restoration Manual

Addendums

Page 2

R0 4-03

4. Obtain another "test" receiver (preferably tube but not mandatory) and connect the

output of one channel to the Dynaco Stereo-70 Right Channel Speaker Terminals 8 Ohm

and Ground.

5. Obtain a 8 Ohm "Test" Loudspeaker and connect it to the Dynaco Stereo-70 Left

Channel Speaker Terminals 8 Ohm and Ground.

6. Have the other channel of the service amplifier directly connected to another

loudspeaker (control speaker) identical to the test loudspeaker. Set the test receiver to

monophonic operation.

7. Starting at very low levels (with the volume control of the test receiver fully

attenuated) bring up the level until you have a soft level available from both the test and

control loudspeaker. Note – it is not necessary to operate the test receiver at high or even

moderate volumes – it is only necessary to raise the level sufficiently to be able to discern

equal loudness from both the test and control loudspeaker.

8. With the balance control of the test receiver centered, the sound from both speakers

should be nearly the same. If there is a noticeable difference one of your output

transformers is defective.