RCA's classic RIAA pre-amp, found in
many RCA tube manuals after the mid 50's.

Once again, no unusual parts required.
A Hammond 370BX with a simple C-L-C or
C-R-C filtered B+ should work as the power supply.

We had a limited run pc board (no longer available) made of this circuit which was well received.
While more complex high tech variations of this circuit have been done over the years
sometimes simplier is still better.


From Audio Asylum:

A variant RIAA circuit by Eli Duttman
As above, seperate window (pop-up)