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RE: CS8412/14 upgrade

Posted by GTCharlie (A) on January 10, 2008 at 00:53:11

In Reply to: RE: CS8412/14 upgrade posted by Tom R on January 9, 2008 at 18:07:31:

I did nothing drastic : wound separate transformer for digital board to bridge, BG Super E; another transformer for the analogue B+ and 6922 filaments, into their own rectifier bridges. B+ is now L-C-L-C. Using oil cans for the C, and Tamura 30Hy for the L. K-bypass cap for the SRPP 6922 is now super-e. Output is still cap-coupled. I didn't measure the original iron, but my present irons run and never get beyond a degree or two above room temp. I left as is and didn't alter AN's cascaded transformers - the four cylinders - to lop off high frequency grunge. I am curious about your "cathode follower" Did you parallel the 2 halves of the dual triodes, and tapped into the cathode? or did you cascade the 2 halves ? WHat's your plate and cathode voltage? Current? I didn't touch the SRPP anymore because it was handling minuscule signals anyway ... but your amendments might be superior to the original.

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