Phono amp schematics

For MC you need something serious. There are some attainable
designs out there (parts available from multiple sources/non-budget
breakers).

1. Morgan Jones 5842 RIAA or EC8010 RIAA amp. You will have to
buy his book to get the schematic. Uses high gm tube to get the
noise way way down. EC8010's are around for about $30/pop
however they last a very long time.

2. Allen Wright FVP-5. Schematic is online at www.vacuumstate.com
(SP-15 article). This is a 6922 with a high gm JFET cascode. This is
probably the cheapest and easiest and most attainable of all the MC
preamps. The matched JFETs can be had from www.borbelyaudio.com

3. Thorsten Loesch Toccata. E810F's using S&B LCR RIAA networks.
Probably will cost $1000 just for th parts. E810Fs are expensive but
very high performance tubes.

Long project! :)


Dont Forget Jensen Transformers, they also sell MC transformers,
in mu-metal, for various step-up ratios.

-- Jim
 
jrdmedford said:
1. Morgan Jones...You will have to buy his book to get the schematic.

The book is worth buying in its own right....


2. Allen Wright FVP-5. Schematic is online at www.vacuumstate.com
(SP-15 article). .

One of my favorites... Allen goes into this in detail in his Preamp Cookbook -- another recommended volume.

dave