Mpp - Page 836

Benedetto · 13th February 2013, 07:11 PM

Custom made Heatsinks- COOOOL
B.t.w. luv da Smurfs

Joachim Gerhard · 14th February 2013, 04:34 PM

Here is the concept of the Cro Magnon Tube.
A volume control could be integrated ( or not ).
There are 3 different versions that have their pros and cons.

Joachim Gerhard · 15th February 2013, 02:01 AM

I have build an input stage that COULD work. DC conditions are rock solid so now i can try how much gain i can get out of it. I need a gain of about 300x to 400x at DC.

Joachim Gerhard · 15th February 2013, 04:06 AM

Bobby Blue Bland - Ain't No Love In The Heart Of The City (1974) - HQ on Vimeo

keantoken · 15th February 2013, 12:30 PM

That song was used in the Lincoln car commercials. That's the only reason I know about it.

FdW · 17th February 2013, 10:46 AM

For whom it may concern (or be useful

) http://technologyinterface.nmsu.edu/...Fall09/011.pdf

RCruz · 17th February 2013, 11:14 AM

Quote:

Originally Posted by FdW

For whom it may concern (or be useful

) http://technologyinterface.nmsu.edu/...Fall09/011.pdf

Nice way to put it

Joachim Gerhard · 17th February 2013, 11:31 AM

i will study this, thanks.

Bksabath · 17th February 2013, 11:59 AM

Quote:

Originally Posted by FdW

For whom it may concern (or be useful

) http://technologyinterface.nmsu.edu/...Fall09/011.pdf

Tanks a lot for that

Almost got spontaneous brain burn out caused by math symbols and 2 remaining brain cells being almost 50 proof.

I was going to use this
Transistor matching

and would welcome same advice please

If I place a 100 Hom's resistor where the picture shows the A meter
I can measure volt drop across the resistor Yes?
What would be the best value for the resistor?

Joachim Gerhard · 17th February 2013, 12:42 PM

You have to make sure that the resistor does not drop too much voltage.
Say you use a 9V battery and the Fet has an Idss of 10mA. You want to drop 2 V.
That makes the resistor U/I = R
2 / 0.01 = 200 Ohm
Your 100 Ohm whould drop 1V. That is ok too.

13th February 2013, 07:11 PM	#8351
Benedetto diyAudio Member Join Date: Nov 2007 Location: Knifetown-Germoney	Custom made Heatsinks- COOOOL B.t.w. luv da Smurfs __________________ preregulatorpeterE-MAIL

15th February 2013, 12:30 PM	#8355
keantoken diyAudio Member Join Date: Aug 2006 Location: Texas Blog Entries: 1	That song was used in the Lincoln car commercials. That's the only reason I know about it. __________________ The Kmultiplier rail filter! LTSpice wiki with special attention to new users' troubles

17th February 2013, 10:46 AM	#8356
FdW diyAudio Member Join Date: Feb 2009 Location: Both feet on the ground (near Gouda)	For whom it may concern (or be useful ) http://technologyinterface.nmsu.edu/...Fall09/011.pdf __________________ Signature Transresistance Current-Feedback BIGBT Amplifier; Push -->>{{ }}<<-- there.

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15th February 2013, 02:01 AM	#8353
Joachim Gerhard diyAudio Member Join Date: Mar 2009	I have build an input stage that COULD work. DC conditions are rock solid so now i can try how much gain i can get out of it. I need a gain of about 300x to 400x at DC.

15th February 2013, 04:06 AM	#8354
Joachim Gerhard diyAudio Member Join Date: Mar 2009	Bobby Blue Bland - Ain't No Love In The Heart Of The City (1974) - HQ on Vimeo

17th February 2013, 11:31 AM	#8358
Joachim Gerhard diyAudio Member Join Date: Mar 2009	i will study this, thanks.

17th February 2013, 12:42 PM	#8360
Joachim Gerhard diyAudio Member Join Date: Mar 2009	You have to make sure that the resistor does not drop too much voltage. Say you use a 9V battery and the Fet has an Idss of 10mA. You want to drop 2 V. That makes the resistor U/I = R 2 / 0.01 = 200 Ohm Your 100 Ohm whould drop 1V. That is ok too.