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Audio equipment

Fisher amplifier distortion ca_271 .. !!

Rafael zamora

hace 5 años

Hello, merry Christmas ... I am having problems with a fisher amplifier ca_271 (vintage) presents distortion at low volume, as it will lower the voltage.I think of the potentiometer but it is not, the capacitors have me in doubt but they look good (not I have measured) ... and I have a concern: what differentiates a stk without a Roman to another who has it (ex: stk0080 to stk0080 || .. ??? ... a thousand thanks .. !!

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jomi

38.143

hace 5 años

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hace 5 años

Verify that the voltages that feed the amplifier are of equal value but of the opposite sign (+61.5 and -61.5 V) Also with the minimum volume and without any audio input. It measures voltage between terminals 21 and 22 for one channel and 23 and 24 for the other. Must dial 7 mV

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Rafael zamora

hace 5 años

Ok ... I'll do that ... thanks a million .. !!

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Rafael zamora

hace 5 años

Greetings ... I have made the measurements and the voltage is fine.It may be that the stk 0080 have some damage ?? or the electrolytic ones are dry ?? .. my head hurts a lot of thinking ... help ... thanks .. !!

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