V6 amplifier

[sajti]

PCB with resistors only. I use mainly DALE RN series, and some Takmans in the feedback network.

 

[sajti]

PCB ready to attach to the heatsink.

 

[sajti]

very nicely done sajti, congrats!. very stable/desirable offset and bias parameters too.

regards
Prasi

Hi Prasi,

I use KSC1845/KSA992 in the input stage, all selected the hfe within 2%. The input bias offset is about 100-150nA.

Sajti

 

[sajti]

New version under construction:

 

[thimios]

Nice work!
I like your work, very professional!
Regards.

 

[sajti]

The next member of my amplifier family, the V8. PCBs just arrive:

 

[sajti]

The new version of V4 is under construction.

 

[sajti]

Simulated THD.

Sajti

 

[sajti]

Finally finished:

Dual mono PSU, with 250VA toroidal transformers, and 40000uF on each side.
+/-42V PSU, 70W/8ohm, 120W/4ohm output power.
Separated small psu for the protection. 2sec turn on delay, DC protection over +/-1,5V, and overheat shut down at 90degree.

Sajti

 

[sajti]

New version was born in the last weekend. New semiconductors in the front end, reduced loop gain, different value in the compensation, new solution for DC offset settings. New location for the trimmers for easy access, and settings.

Sajti

 

[eliasib]

Hi,

this project was started about 3months ago, to develop small sized amplifier, with high quality, and 120-140W/8ohms power.
Schematic attached.

Sajti

Excellent project. The KSC3503 and Partner, which transistors can they be replaced with?

 

[sajti]

Excellent project. The KSC3503 and Partner, which transistors can they be replaced with?

Nothing new. I just found some 2SC2705/2SA1145 at home.

Sajti

 

[eliasib]

Nothing new. I just found some 2SC2705/2SA1145 at home.

Sajti

Perfect, Sajti. Nice amplifier.