phrarod said:
Dude,
Refer to the plate curves in the TungSol data sheet. The idea is to pick a plate current (IB) well into the nicely spaced portion of the curves. Avoid the bent, non-linear, section. An IB in the 10 - 15 mA. range seems highly suitable to me
Hi Eli. I've never worked with tube curves so I'm not confident in reading them.
Since this is 2 tube sections do I need to try for that on both sections or just the final or first stage. See I'm confused.
Since this is 2 tube sections do I need to try for that on both sections or just the final or first stage. See I'm confused.
I know it's an old topic, but I am hoping for an answer on my questions (all related to the AN 5687 pre-amp):
@pharod: you are talking about reducing the value of the grid stopper resistor. Do you mean the one which is 1K originally, or did you fit one before the grid of the 2nd stage?
@all: is it a good thing to add a grid stopper resistor before the grid of the 2nd stage? Is the value critical?
@pharod: you are talking about reducing the value of the grid stopper resistor. Do you mean the one which is 1K originally, or did you fit one before the grid of the 2nd stage?
@all: is it a good thing to add a grid stopper resistor before the grid of the 2nd stage? Is the value critical?
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