100W Ultimate Fidelity Amplifier

[macd]

PCB Please.....

Powerfull version made for test have only 1mV DC offset.

Sir can you share this PCB please?

Regards,
macd

 

[apexaudio]

Sir can you share this PCB please?

Regards,
macd

You want to build 500W Hi-Fi amp
I must draw schematic for this version, than I will share PCB
Regards

 

[a.wayne]

Powerfull version made for test have only 1mV DC offset.

Hello Apex,

any word on this version ....?

 

[apexaudio]

Hello Apex,

any word on this version ....?

Triple darlington output stage with class H step driver and VI limiters, other is same as AX14
Regards

 

[a.wayne]

Ohhh , i thought it was for hi-fi listening, only hi-powered........

 

[apexaudio]

Ohhh , i thought it was for hi-fi listening, only hi-powered........

It's for hi-fi listening, but with large speakers
Regards

 

[apexaudio]

Any amp is based on OP amp (http://www.diyaudio.com/forums/solid-state/162494-amplifier-motherboard.html ) , for output power amp topology is not important.

 

[jef9200]

Hi,
I want to try the regulated supply (just for the fun!), but i've 2X30V ac (not 2X50V), so 45v dc, is there values i must change on the shématic ? I want -+40v from the supply
Thanks.

 

[apexaudio]

Hi,
I want to try the regulated supply (just for the fun!), but i've 2X30V ac (not 2X50V), so 45v dc, is there values i must change on the shématic ? I want -+40v from the supply
Thanks.

Use 8,2V zeners instead 12V
Regards

 

[jef9200]

Thanks for your answer, could you suggest a power rating for this zener ?

 

[apexaudio]

Thanks for your answer, could you suggest a power rating for this zener ?

Use 400mW zeners.

 

[noobie]

mje350=kse350??

apex can i use kse350 instead mje350?? with the same specs as mje350.
thanks

regards

 

[apexaudio]

apex can i use kse350 instead mje350?? with the same specs as mje350.
thanks

regards

Yes, there is many replacements for MJE340/350, U can use any of them.
Regards

 

[apexaudio]

2SA1478/2SC3788 can be use instead MJE340/MJE350

 

[jef9200]

Regulated supply build ! Works fine, very usefull for trying amps because it is possible to change the output voltage. 2X30V AC tranfo, 45DC ; i've try output from 30DC to 42 DC. Only 2X10000uf on the psu board. Zener= 8,2V.
Thanks Apex.

 

[apexaudio]

Regulated supply build ! Works fine, very usefull for trying amps because it is possible to change the output voltage. 2X30V AC tranfo, 45DC ; i've try output from 30DC to 42 DC. Only 2X10000uf on the psu board. Zener= 8,2V.
Thanks Apex.

Can you post pictures? You need 4x10000uF for regulated PSU...
Regards

 

[jef9200]

2 X10000uf more and .... a problem... don't work ! Test transfo OK (33AC) But voltage on the bridge rectifer output +_ very stange 93V ! . Bridge is KBPC1010 10A1000V. No smoke on the board. No explosions..

 

[jef9200]

OUf . It's oK now. Just a problem with a connector. I'll try to post a picture.

 

[apexaudio]

Can you post pictures? You need 4x10000uF for regulated PSU...
Regards

There is 4x10000uF on schematic...

 

[jef9200]

One inconvenient of the board : there is only one output GND. I'll have to use a connector or make 2 new holes in the GND trace. An Idée ?
The pictures