Post your Solid State pics here.

[smithy666]

Hi again Fotios
Likewise to you - very nice boards & construction. I really like seeing other people's boards/construction, as it always gives ideas for the next project
Best regards
smithy

[fotios]

Originally posted by smithy666
Hi again Fotios
Likewise to you - very nice boards & construction. I really like seeing other people's boards/construction, as it always gives ideas for the next project
Best regards
smithy

Many thanks my friend.
During this time i am in the process of drawing the power supply board, including also the protection computer. It is a big board. For this reason i have not posted curves yet, because untill now the module supplied from my Lab power supply. When the project completed, then i will post the curves.

Regards
Fotios

[lineup]

Nice one, Bonsai
Here: http://www.diyaudio.com/forums/attac...amp=1171370431


My own picture shows a small solid state devices.
Think nobody can guess what it is .........
Discrete & symmetrical, as usual from my Lineup Audio Lab.
Battery for compare of actual size.

[fotios]

Originally posted by lineup

Nice one, Bonsai
Here: http://www.diyaudio.com/forums/attac...amp=1171370431


My own picture shows a small solid state devices.
Think nobody can guess what it is .........
Discrete & symmetrical, as usual from my Lineup Audio Lab.
Battery for compare of actual size.

Hi Lineup

It is a discrette operational amplifier for use in preamplifiers?
The only that i can say with certainty, is that it is not implemented with symmetrical LTPs as you like usually.

Greetings from Hellas

Fotios

[lineup]

Here is my workbench .. in the notorius Lineup Audio Lab.
A bit messy perhaps.

But like in painter's studio .. where is creative creation in colours going on
here Must be A Sort of Mess & Mixture

[lineup]

Originally posted by fotios
Hi Lineup
It is a discrette operational amplifier for use in preamplifiers?
Greetings from Hellas, Fotios

No.
It is symmetrical alright. But not a differential pair ....
For use in pre amplifiers, yes.

[fotios]

Originally posted by lineup


No.
It is symmetrical alright. But not a differential pair ....
For use in pre amplifiers, yes.

Then you are using two complementary transistors to share the input, which in sequence drive two complementary output transistors. Obviously, you are not using LTP configuration in feedback. Also the feedback it is DC coupled in GND, giving thus a low feedback ratio to obtain a wideband response.
Am i right now?

Fotios

[lineup]

Okay.
One NPN + one PNP put together, for temp compensation only.
This circuit is a discrete Symmetrical Shunt diode.
Each diode make 7.50 Volt from middle = 0 Volt.

To use this, you fead this symmetrical mirrored two VBE Multipliers
from two 9 VDC battery, with middle = 0 Volt.

As with shuntdiodes (zener) you have to put resistor to provide current into shunt.
Say 2 x 9.0 VDC input and 2 x 7.50 VDC output.
Makes 9.0-7.5 = 1.50 Volt drop.
Fead this symmetrical zener from two 1k5 resistors. 1 mA will flow through those VBE multipliers.

This one is not used as 2 x 7.50 Volt shunt regulator.
It is used for making 2 x 7.50 symmetrical Reference Voltages.
For my pre amplifier circuit.

[fotios]

Originally posted by lineup
Okay.
One NPN + one PNP put together, for temp compensation only.
This circuit is a discrete Symmetrical Shunt diode.
Each diode make 7.50 Volt from middle = 0 Volt.

To use this, you fead this symmetrical mirrored two VBE Multipliers
from two 9 VDC battery, with middle = 0 Volt.

As with shuntdiodes (zener) you have to put resistor to provide current into shunt.
Say 2 x 9.0 VDC input and 2 x 7.50 VDC output.
Makes 9.0-7.5 = 1.50 Volt drop.
Fead this symmetrical zener from two 1k5 resistors. 1 mA will flow through those VBE multipliers.

This one is not used as 2 x 7.50 Volt shunt regulator.
It is used for making 2 x 7.50 symmetrical Reference Voltages.
For my pre amplifier circuit.

Well, this is a realy new and very smart invention.
What can i say then?
My compliments sir!
I asked your colaboration in building a preamplifier. If you are interested, give me a link to contact with you privatelly.

Greetings
Fotios

[Mooly]

Lineup,
Your workbench -- it is missing two vital items. Large hammer for minor adjustments and a supply of hog bars and "KitKats"