[Jukebox-list] AMI R145 Amp Modification

[WHITE, JAMES P]

Steve,
The fellow who is helping me could not locate the RIAA EQ.  He
recommended we start at the grid (pin 2) of the 12AU7 (V2).

Anyone care to comment on where the RIAA Equalization Circuit is on the
R-145 amp?

Here is a link to the schematic on Uncle Vern's website
http://www.verntisdale.com/schem/ami-f-j.jpg

Thanks, JP  

_______________________________________________________

Don't forget the RIAA EQ curve that must be in there somewhere.
Unless you inject your signal after it, it will greatly attenuate the
high frequencies.

http://stereos.about.com/od/gtgtturntables/a/riaa_eq.htm
http://en.wikipedia.org/wiki/RIAA_equalization

I have no idea where in the amp's signal path this occurs, as I don't
read schematics that well; so maybe you've already handled the problem
by
injecting past it.

--> Steve
-- 
Steve Wahl