If you're not a gênius do not read that..jump!

destroyer X · 15th April 2004, 02:53 PM

A lot of good people run away when presented to this little problem....people with degrees told that "no time enough"..... others told me they will answer me later on(never done).....some friends told me that the situation has "no solution".... this is the easier way.

I cannot, but some "golden electronics monsters", related to knowledge, will think that's easy!

But i will give a gift to the challenging one that helped me.... an magnificent problem that you will spend at least 30 minutes thinking if you are a very high Intelectual Quocient.... some people is trying since the 1995!

Carlos

Elso Kwak · 15th April 2004, 03:18 PM

Where is the problem?. My brain needs some exercise.
I don't see any problem presented.

Bill Fitzpatrick · 15th April 2004, 03:31 PM

Quote:

Originally posted by Elso Kwak

I don't see any problem presented.

Maybe that's why he could never get a answer!

Elso Kwak · 15th April 2004, 03:40 PM

Quote:

Originally posted by Bill Fitzpatrick

Maybe that's why he could never get a answer!

Hi Bill,
OK problem solved!

You may have the gift.

Keld · 15th April 2004, 03:44 PM

The answer is 42!

So long and thanks for all the fish!

Bill Fitzpatrick · 15th April 2004, 03:52 PM

Quote:

Originally posted by Keld
The answer is 42!

Fool. The answer isn't a number - it's a color. Maybe red.

chris ma · 15th April 2004, 04:16 PM

R1=150
R2=4K7

bigparsnip · 15th April 2004, 04:51 PM

If you want to know the relative current gain for each of the darling ton sets than that is a fairly easy question, the first one will be around 3000, the second 4875. Of course this will depend also on the bleeder resistors a little (but not a lot), and the rather large range of values you will have for the real life trasistors.

But then, this may also nt be an answer to the question you were asking (although it is an answer to A question).

johnnyx · 15th April 2004, 05:08 PM

The answer is to make sure that the circuit they are used in is immune to variations in transistor gain. The "N" and "P" types will always be different at some point, as you have seen. If you built another one, then the gains will be different again. Make it irrelevant. Making R1 & R2 the same in each one will help swamp the differences.

Now you have another answer. What was the question again?

tiroth · 15th April 2004, 05:27 PM

Hmmm....is there a variant of the "Lady or the Tiger" waiting in the wings?

15th April 2004, 03:18 PM	#2
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Where is the problem? Where is the problem?. My brain needs some exercise. I don't see any problem presented.

15th April 2004, 03:44 PM	#5
Keld diyAudio Member Join Date: Jan 2002 Location: Borås, Sweden, Tellus	The answer is 42! So long and thanks for all the fish! __________________ "What is done by what is called myself is, I feel, done by something greater than myself in me." James Clerk Maxwell. 1879

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15th April 2004, 04:16 PM	#7
chris ma diyAudio Member Join Date: Sep 2001 Location: Pickering, Canada	R1=150 R2=4K7

15th April 2004, 04:51 PM	#8
bigparsnip diyAudio Member Join Date: Apr 2003 Location: Cambridge	If you want to know the relative current gain for each of the darling ton sets than that is a fairly easy question, the first one will be around 3000, the second 4875. Of course this will depend also on the bleeder resistors a little (but not a lot), and the rather large range of values you will have for the real life trasistors. But then, this may also nt be an answer to the question you were asking (although it is an answer to A question).

15th April 2004, 05:08 PM	#9
johnnyx diyAudio Member Join Date: Jan 2004 Location: manchester	The answer is to make sure that the circuit they are used in is immune to variations in transistor gain. The "N" and "P" types will always be different at some point, as you have seen. If you built another one, then the gains will be different again. Make it irrelevant. Making R1 & R2 the same in each one will help swamp the differences. Now you have another answer. What was the question again?

15th April 2004, 05:27 PM	#10
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Hmmm....is there a variant of the "Lady or the Tiger" waiting in the wings?

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