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Old 11th November 2009, 01:14 AM   #2661
Salas is offline Salas  Greece
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That will be best for noise with the Supex 909. 6.8R R2 for you, 100R load in, and don't forget to sink the 2SK170 that feeds the leds (Q6). And you will use V2R5 at 46V with it?
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Old 11th November 2009, 01:28 AM   #2662
Tham is offline Tham  Malaysia
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Still have not built V2R5 yet. I hope to have one built to replace the faulty v1.5 for my DAC for a start.

For the 4 2sk170 version, maybe I could try modifying my current p2p unit and increase the Vout of the v1.5 to 46V.
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Old 11th November 2009, 01:31 AM   #2663
Salas is offline Salas  Greece
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That will be a very interesting phono + shunt combination for your Supex. I wait to know your results and see pictures.
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Old 11th November 2009, 01:45 AM   #2664
Tham is offline Tham  Malaysia
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Hope to have it done soon . May have a problem with 46v v1.5 though.
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Old 11th November 2009, 02:14 AM   #2665
Salas is offline Salas  Greece
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That V1 46V I have shown surely works if you have any problems. Has been made before. Only remember to get some TO92 minisinks for the 2SKs that feed the 46V Low MC leds ref, the one 550C in the shunt, or possibly 2n5087 if V1.5.
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Old 11th November 2009, 04:14 AM   #2666
iko is offline iko  Canada
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Don't do v1.5; if you want simple and robust, do v1, otherwise v2r5c, which works better than v1.5 and it's better suited for higher voltages. Today I tested v2r5c with a brutal square wave load. Did well. It would be interesting if a good gyrator/cap multiplier would be a nice addition before the shunt, for a phono stage.
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Old 15th November 2009, 03:48 PM   #2667
RCruz is offline RCruz  Switzerland
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Hi Salas

I am now using the 48db gain riaa with a clearaudio solution with a clearaudio talismann 0.5v output cart..... It is wonderfully sounding as is but maybe it could be better with a little more gain... should I try the 2200u cap on the first stage ?
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Old 15th November 2009, 03:57 PM   #2668
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Quote:
Originally Posted by RCruz View Post
clearaudio solution with a clearaudio talismann 0.5v output cart...
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Old 15th November 2009, 04:33 PM   #2669
Salas is offline Salas  Greece
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Quote:
Originally Posted by RCruz View Post
Hi Salas

I am now using the 48db gain riaa with a clearaudio solution with a clearaudio talismann 0.5v output cart..... It is wonderfully sounding as is but maybe it could be better with a little more gain... should I try the 2200u cap on the first stage ?
Fastest solution, yes. Evaluate, it sounds good too.
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Old 15th November 2009, 04:38 PM   #2670
RCruz is offline RCruz  Switzerland
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I am a little puzled after reading you are using a 56db riaa with the DL103 and needed the cap in the first stage... what is the DL103 output ?
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