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Old 23rd March 2002, 04:54 PM   #1
diyAudio Member
Join Date: Dec 2000
Location: Germany
Angry Balanced Phono Stages

Hello you guys, especially Gray Rollins.

Working on a balanced Tubed Phono stage too.
Lundahl 9206 Transformer, Diff. Cascode with floating RIAA between the anodes, current sourced
(transistor) and another Diff. Amp as 2. Amp/Driver.

has anyone better suggestion? As I saw Gray Rollins is working on a balanced Phono. Can you provide some Info.

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Old 23rd March 2002, 11:02 PM   #2
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Join Date: Mar 2002
Location: Hawaii
That's a good way to do it. The cascode does a great job reducing input capacitance. You can also replace the input tubes with jfets for more gain.

I'd almost suggest splitting the RIAA between gain sections and adding a follower-type buffer for the output. But if I did, you'd build what I have.
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Old 24th March 2002, 03:46 AM   #3
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Default Allen Wright

Check out and look in schematics at the RTP series. Amazing linearity and SNR.
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