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In the Forum: Analog Playback
In the Thread: Where are our good phonostages?
Post Subject: Re: It is indeed!Posted by Thorsten on: 12/8/2004
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 Brian Clark wrote: |
| The 834P was a revelation for me, being a circuit that I would have dismissed as "old hat" (Feedback? 12AX7 cathode follower? Do me a favour!). |
|
Me too, but you know me, i'm mainly pragmatic. The EAR 834P is rather better than one would think, even with cheap parts, a testament to the skills of TdP.
| Brian Clark wrote: |
| I like it so much that I intend to build an "enhanced" copy a la Thorsten/Carsten for reference (and enjoyment!) before investigating the high Gm alternative (D3a + E55L or E810F ) My step-ups will be S&B. |
|
If you do, do seek out old Air dielectric AM tuning Capacitors. You only need 110pF & 330pF, both can be found suitably. Once you tuned the RIAA to perfection simply superglue the shaft in.... I used to use that trick in prototyping in the old days when tuning Op-Amp compensations and found circuits sounded better with those "Air Variable" capacitoirs than they did with good quality polystyrene for stabilisation.
Ciao T
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