If I put my notes here, I might be able to find them again later!
VSPSX phono stage design idea
The original VSPS is getting up in years, and could do with a bit of an update.
The VSPSX adds the foursquare shunt-source voltage regulator and bboard v2.1 output buffer.
Development thread here.
[updated attached content to rev. 1.0a4]
Two mistakes in previous BOM:
C4 was a 5mm lead spacing Wima MKP but the board spacing is only 2.5mm. The part is changed to Wima MKS with 2.5mm lead spacing.
R22,23 was incorrectly given as 47.5k, it should have been 4.7k and has been since updated to 10k. This is not a critical value, the circuit will work with any of the resistances.
[further work]
The boards have been revised to 1.2a. The new design is posted to the development thread.
The VSPSX adds the foursquare shunt-source voltage regulator and bboard v2.1 output buffer.
Development thread here.
[updated attached content to rev. 1.0a4]
Two mistakes in previous BOM:
C4 was a 5mm lead spacing Wima MKP but the board spacing is only 2.5mm. The part is changed to Wima MKS with 2.5mm lead spacing.
R22,23 was incorrectly given as 47.5k, it should have been 4.7k and has been since updated to 10k. This is not a critical value, the circuit will work with any of the resistances.
[further work]
The boards have been revised to 1.2a. The new design is posted to the development thread.
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