Simple Ripple Eater PSU for the sx and kx-Amplifiers
A high quality double sided through hole posted and silk screened PCB is available for this power supply from Jim’s Audio here: Ripple Eater PSU for kx and six Amplifiers Here is a very simple capacitor multiplier PSU aka ‘ripple…
The Endless Semantic Debate: Current and Voltage Feedback Amplifiers
It seems some are still agonizing over the ‘current feedback’ versus ‘voltage feedback’ definition. Clearly a case of people wanting to continue to flog a horse that was laid to rest five decades ago during the heyday of the analog…
Hifisonix kx-Amplifier
The Hifisonix kx-Amplifier is a 28 Watt class A DIY power amplifier featuring low distortion, wide bandwidth and fast rise/fall times. It can be operated either in pure class A mode, or in class AAB mode with a lower output…
Very Simple, Accurate RIAA Phono EQ Amp
Here is a simple no-nonsense RIAA amp you can easily build. The design uses an all-active topology and is based around an NE5534A low noise opamp. I make no claims for originality but you wont find any voodoo engineering, fairy…
An Accurate Inverse RIAA Network
The diagram above summarizes the interaction of the cutting head response (purple) and the playback EQ (red) which produces the final flat response (green). Note that the cutting head and the phono pickup (cartridge) are velocity transducers and therefore the…
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