Robert Koda Preamp and LU1014D

[Algar_emi]

Hi, just currious about the famous Koda Preamp gain circuit. If we look at the few pictures available, seems to me it use the LU1014D, with some large Mosfet, with possibly a CRC supply filter, and JFET input buffer.

Parts choice seems pretty usual: vishay, PRP, and MFR25 film resistors, Elna for audio, Muse and Nichicon Rubicon VZ electro caps.
Even the power supply rectifiers seems to be on the board.

Anyone knows the used topology? Just curious…

SB

 

[NicMac]

Did you ever get to know this preamp gain stage?
He is talking about about an: "inverted trans conductance (ITC)" configuration", but I have no clue to what that might be. Done with LU1014s.