Base voltage of 2N4401.

Nigel Goodwin · Jul 15, 2023

crutschow said:
So I see no where in that circuit that any significant reverse bias voltage is being applied to a base-emitter junction.

No, or any 6V forward bias either.

However, I'm not happy with sticking 40mA permanently down the base of Q4, if for any reason the circuit doesn't oscillate Q4 won't last very long. As opposed to being 'fail save' it's more 'fail catastrophe'

Lightium · Jul 15, 2023

So the circuit checks out ok? Thanks for the help and tip.

Nigel Goodwin · Jul 15, 2023

Lightium said:
So the circuit checks out ok? Thanks for the help and tip.

I didn't say that - it seems bizarrely designed, with highly bizarre values - but there's no '6V on a base' anywhere.

Lightium · Jul 15, 2023

Yeh, I learned this new trick where I can measure the average and rms voltages and it looked good to me.

Lightium · Jul 15, 2023

II understand that it's bizarre. I'll will take more time with it before building.

Base voltage of 2N4401.

Nigel Goodwin

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Base voltage of 2N4401.

Nigel Goodwin

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