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Old 30th April 2008, 05:27 PM   #1
diyAudio Member
Join Date: Mar 2008
Default phono pre RIAA 2001

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

Kind regards,
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File Type: jpg forum_riaa_2001_darius_inside_2008_0430bild.jpg (55.0 KB, 608 views)
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Old 1st May 2008, 11:41 AM   #2
diyAudio Member
Join Date: Mar 2008
Default RIAA-2001 explained...

I started a blog for this thing:
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,
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File Type: zip (90.4 KB, 134 views)
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Old 7th May 2008, 06:56 PM   #3
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Join Date: Mar 2008
Default RIAA 2001

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


Kind regards,
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Old 7th May 2008, 08:04 PM   #4
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sorenj07's Avatar
Join Date: May 2006
Location: Berlin
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.
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Old 8th May 2008, 08:00 AM   #5
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Join Date: Mar 2008
Default #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,
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Old 8th May 2008, 09:05 AM   #6
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Join Date: Jan 2005
Location: Denmark
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.


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