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RE: Just purchase a Little Bear T10 Pro phono-stage ......

Posted by coffee-phil (A) on April 29, 2016 at 22:29:42

In Reply to: RE: Just purchase a Little Bear T10 Pro phono-stage ...... posted by twystd on April 29, 2016 at 14:37:14:

Hi Twystd,

Thanks! No rush as my LB is not together at the moment. Currently it has a bogus 34 db RIAA feedback network installed. I had reasonably working 40 dB network installed. The final values were tweaked from what I had calculated. I dismissed that to lack of open loop gain. If that were so the calculated 34 dB values should have worked with minimum tweaking. I then started reading Lipschits' paper and saw the error of my ways. Humbling experience! After more study of Mr. Lipschits' work I'll decide on a new network and fire it up again. Then I'll compare the Chinese 6N2s to the Russian ones. I can also compare some 12AX7s.

On of the "shiny objects" distracting me from the LB is the R-O-K, in particular the Papst motor. I lost the link to the three phase function generator which you are using. Please refresh me on that. I found a two channel DDS function generator which can control the offset of two phases. As you know it is my belief that if you get two phases to the delta connected motor right, Mr. Kirchoff will take care of the third. Even so having all three phases at my disposal has to be a good thing.
Looking forward to your updates to the three phase drive.

Thanks Much,

Phil

• http://www.ebay.com/itm/162053496580?_trksid=p2060353.m1438.   (Open in New Window)

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