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Original Message

RE: LD2+ Revisit of Mu follower

Posted by IDM on September 13, 2011 at 13:45:43:
Hi Tony,

Thanks for the information. I have rebuilt the LD2+ using the traditional mu follower and it is a huge step forward from the original version.

I am however intending to have a go at the parallel 6sl7 with a 10M45 CCS. As far as I can see from previous posts, all that needs to change is the cathode resistor needs to be increased to 1K5, the tubes paralleled and the 10M45 to receive the full 400V B+ with the potentiometer adjusted to give 2mA of current.

I don't understand your comment about the dropping resistor feeding the CCS (62K). Have I misunderstood something?

Thanks
Ian