RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues.

Those issues were discussed here a while back. You might search the archives. The impedance is low enough such that no bypass is needed; for sure it's way below 33R and not that reactive in nature at audio frequencies. Of that I am confident. I've used red LEDs that give 1.8V, and I've used Schottky's that give much lower voltage drop (less than 0.7), such that you may want to string a few together to get the bias where you want it. Both sound excellent. I actually robbed some red LEDs from an unused Bottlehead CCS kit to do this, because they were hand selected to give 1.8V.

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Follow Ups Full Thread

Topic - 'near' zero volt bias for low level stages - shane. 01:53:40 09/11/13 (12)

RE: 'near' zero volt bias for low level stages - Thorsten 12:47:45 09/13/13 (3)

RE: 'near' zero volt bias for low level stages - shane. 23:53:01 09/13/13 (2)

RE: 'near' zero volt bias for low level stages - Thorsten 00:15:07 09/14/13 (1)

thanks (nt) - shane. 00:59:28 09/14/13 (0)

RE: 'near' zero volt bias for low level stages - Paul Joppa 09:50:33 09/11/13 (1)

RE: 'near' zero volt bias for low level stages - shane. 15:09:09 09/11/13 (0)

"more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - Chip647 05:27:09 09/11/13 (5)

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - shane. 15:11:15 09/11/13 (4)

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - Lew 06:58:14 09/12/13 (3)

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - shane. 21:56:54 09/12/13 (2)

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - Lew 08:56:07 09/13/13 (1)

Thanks, Lew. (nt) - shane. 23:34:12 09/13/13 (0)

Follow Ups

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues. - Lew 08:56:07 09/13/13 (1)

Thanks, Lew. (nt) - shane. 23:34:12 09/13/13 (0)

RE: "more prone to grid current issues and also non-linearities when biased so low. " Yes, those are the issues.

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