Siemens - Klangfilm
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Output Transformers
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| Siemens Sf V 6.4 modification for hifi use | ||||
| I know that negative feedback is not really popular around single ended listeners, but in this case the uncontrolled bass, the high hum and noise level and the bad high frequency response make a slight feedback necessary. And this is very easy: | ||||
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1. Remove cap 2. Remove resistor 1MOhm 3. Unsolder yellow cable 4. add blue cable 5. add 2k2 resistor 6. solder yellow cable to the green one |
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Original condition |
After modifiaction |
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| After this light modification you will not recognize the amp you heard before !! Keep in mind that it is much better to use the power stage only. | ||||
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