TSSA - The Simplest Symmetrical Amplifier

[sonnya]

I Will build it tomorrow and run it on an analyzer

[Lazy Cat]

Sonnya you're the Man!

[AndrewT]

I thought Sonnya is/was female.

[juma]

Originally Posted by Lazy Cat

...P.S. F5 with input BJT-s.

I entertained that idea and I liked it, but I did it in a different manner...
Off course, using Laterals exclude the need for thermal compensation.

1. Basic idea (post #8231):
F5 power amplifier

2. Working amp (post #6):
Radjanje F5 clone - diyaudio.rs

[sonnya]

Male - i cannot multitaske

[sonnya]

For some reason, the last time we cleaned out in the old component stock we have thrown out all TO-92 bjt!!!!

So i am building it today with KSC3503 and KSA1381. I think the would be a good substitute besides from the gain. But driven from a Low z source it should not be an issue

[Lazy Cat]

Originally Posted by sonnya

For some reason, the last time we cleaned out in the old component stock we have thrown out all TO-92 bjt!!!!

[Lazy Cat]

Originally Posted by sonnya

Male - i cannot multitaske

natural talent

[sonnya]

Originally Posted by Lazy Cat

Schematic explains itself.

1K trimmer is replaced by a 2k2 fixed and in the negative part 1k + 2k trimmer.

RC top and bottom is set to 2.2k=> more OLG.

BC550 and 560 is replaced by KSC3503 and KSA1381.

at 24V it will settle to about 1.2 - 1.4 amp.

for an equal current in the mosfet an vgs difference on the 10n20 and 10p20 from exicon of about ~1V. This will lead to and offset. Maybe a diode in series with one of the collector resistors will help a lot!?.

I have attached the measurements.

[sonnya]

The amp.