phono pre RIAA 2001

[oldeurope]

http://www.diyaudio.com/forums/showthread.php?postid=1496724#post1496724

Good evening,
attached an inside view of the RIAA 2001.

Kind regards,
Darius

 

[oldeurope]

RIAA-2001 explained...

Hello,
I started a blog for this thing:
http://riaa-2001.blogspot.com/
You can see additional pictures of the RIAA pre there.
In the attached zip you find the schematic for the RIAA 2001.
This is a triode design topology. Since most people are not familiar
with triode design, I added three schematics showing opamp simplified
small signal replacements for the triode stages. I think this is helpful
to explain the RIAA2001, isn't ist?

Kind regards,
Darius

 

[oldeurope]

RIAA 2001

Whow, more than 200 views!
Thanks for your interest.

RIAA-2001

Kind regards,
Darius

 

[sorenj07]

looks very cool! it's interesting to see you using AC heaters on a phono preamp, but if it works, it works i'm tempted to build something like this myself.

 

[oldeurope]

#4 AC heated RIAA pre

Hi sorenj07,
AC heating works here because this tube has a screening between filament and g1
and the filament is bifilar.

Kind regards,
Darius

 

[Hojvaelde]

Hello oldeurope

I can see You have a SE output amplifier based on RL12T15 tubes.

Do You have any expirence with RL12P35 tubes. I have a lot of them, and want to build a 5 canal amplifier with them.

Regards

Benny