The tubes I will used for this preamp, from left to right V1（EH 12AX7), V2(GE 5751), V3(EH 12AT7)
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My power transformer has two independent AC 0～140V/100ma outputs, and the SPU have two independent high voltage circuits
Purple wire is for left channel and brown one is for right
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Purple wire is for left channel and brown one is for right
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Connected the shields of power transform to the E connector of power socket
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Connected the AC 15V/1.5A wire(BLUE) to the filament PCB, and connected two wires(RED/WHITE) with the to light up the LED of the power switch
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Hi Jerry,
Where is the best place to earth the chassis?... IEC mains AC power input connector?.. and congratulations on what looks like a very satisfying time for you.
Cheers,
Shane
Where is the best place to earth the chassis?... IEC mains AC power input connector?.. and congratulations on what looks like a very satisfying time for you.
Cheers,
Shane
Last edited:
The RCA input "-" is the best place to earth the chassis, you can see the way I arranged the GND of different parts of this circuit, I have put the illustration picture on
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Begin the installation of AMP case, connected the "-"of input and output of RCA
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Hi Jerry, - so mains earth is connected to the RCA connector which is directly electrically connected to the chassis itself?. Thanks.
No connected one 100R res and 3n3 capacity then to the chassis
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