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Old 2nd September 2008, 08:08 PM   #1
Stee is offline Stee  Italy
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Default The Ping-Pong VAS

see what happens with the copy and paste
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Old 2nd September 2008, 10:36 PM   #2
kubeek is offline kubeek  Czech Republic
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I donīt see it.
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Old 2nd September 2008, 10:44 PM   #3
Stee is offline Stee  Italy
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Default see now

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Old 2nd September 2008, 10:50 PM   #4
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The schematic is wrong.
Output stayes at around 1.4 V.
Also such a "spring" between collectors usually results is stauration of one of transistors.

Adam
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Old 3rd September 2008, 12:25 PM   #5
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The "STD VAS" won't work correctly either. The upper part half of the circuit can't swing negative and vice versa.
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Old 3rd September 2008, 02:42 PM   #6
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true
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Old 3rd September 2008, 03:21 PM   #7
Stee is offline Stee  Italy
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Default Figure 2.5 - A Typical Direct Coupled Transistor Amplifier

see this that i have copied
http://sound.westhost.com/amp-basics2.htm


and this about input
http://www.esafono.it/a700.pdf
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Old 3rd September 2008, 05:46 PM   #8
BV is offline BV  Slovakia
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Again wrong schematic. Try it this way..
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Old 3rd September 2008, 07:09 PM   #9
Stee is offline Stee  Italy
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Default Many thanks BV -->Very GOOD

you are a little genius

divide the functions is the best strategy
compensates for the differences effectively

in the current stage need just put other two LEDs on input
maybe need also two capacitors like A700 diy gene

your simulator can also put resistor's value?

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Old 4th September 2008, 06:58 AM   #10
BV is offline BV  Slovakia
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Stee, we are reinventing wheel or ligt bulb , it is nothing new on schematics.
Of course simulator can put values,
http://www.spectrum-soft.com/index.shtm
download, try it and learn to use.
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