100W Ultimate Fidelity Amplifier

[hassan4119]

over load/over heat/dc/delay

full protection:

 

[prasi]

very symmetric ... can you post schematic also, if possible?

 

[ballisticz4]

@Prasi


Would you happen to have the pcb layout and schematic for the AX17? Like this one

i use the iron on method


Regards
Cedric

 

[prasi]

No, i do not have it.

 

[vargasmongo3435]

macro for multy size capacitor

hi guys I'm seen nice new layouts and I want to share this macro for Sprint users I made it according to the data sheet it can use 3 sizes of caps just press alt on the keyboard to remove the pads you don't need this caps have have different configuration according to part number some have 2 + and 2 - pay attention to that example like this part number
382LX333M080B092VS 33000uF 80V

 

[manniraj]

On the FH9HV (XRK mod) amp board, I could see from the schematic diodes marked as 1N4148 and the other says 12V. So can I just use any diode rated 12v? Someone has the correct part number if I am missing something.

Thanks

 

[prasi]

those are zener diodes, 1/2W min , dont use 1N4148 or any normal diodes.

12V Zener Diode 1W - IN4742 : Buy Online Electronic Components Shop, Price in India : electroncomponents.com

 

[manniraj]

Thanks Prasi, one more query regarding the matching of BC546. Matching the hFE as close as possible should be fine right?

 

[xrk971]

Yes, use 12v zener diodes. Those are protection diodes for the MOSFET gates. For the input BC546 match Hfe as close as possible to keep DC offset low. There is no DC offset adjustment on this amp. It will have typically, a 10mV to 20mV DC offset.

 

[hassan4119]

protect

very symmetric ... can you post schematic also, if possible?

yes im at work...when come to home share schematic...bu its look like apex protection.see you

 

[manniraj]

Yes, use 12v zener diodes. Those are protection diodes for the MOSFET gates. For the input BC546 match Hfe as close as possible to keep DC offset low. There is no DC offset adjustment on this amp. It will have typically, a 10mV to 20mV DC offset.

Thanks X, I have some genuine transistors will do some matching. Also coming to the other transistor MPSA92 which is difficult to source locally, can I replace it with either BC557/558 etc., as per this comparison sheet?

https://www.datasheets360.com/part/detail/mpsa92/3627114811035580012/

 

[stewin]

apex FH11 with 3 pair IRF640N/IRF9640N:
PCB BY: INSTAGRAM@ASHKAN.AUDIO(hassan4119)
SCHEMATIC BY: Mr Mile Slavkovic
mr mile slavkovic This is my gift for friends here and to compensate for your efforts.
zip file is PCB top and bot.enjoy

thanks so much for the share , nice work.

 

[ballisticz4]

I am planning to make it with single pair version , I have posted the design somewhere in recent pages, which will be diy friendly, though I am planning to manufacture them in 2.4 mm , 70um copper. However due to lockdown, its on hold.

Cant wait for this one Prasi

 

[manniraj]

Thanks X, I have some genuine transistors will do some matching. Also coming to the other transistor MPSA92 which is difficult to source locally, can I replace it with either BC557/558 etc., as per this comparison sheet?

https://www.datasheets360.com/part/detail/mpsa92/3627114811035580012/

Can someone confirm on the replacement transistor?

Thanks

 

[xrk971]

You need a PNP HV transistor that can handle the full +/-rails or in this case at least 80v for +/-40v and 104v in case of FH9HV. BC5xx are only 60v devices.

Try the 2N5401 is rated 160v would also work.

Or try KSA992 which can handle 120v. Check leg pin outs and adjust as necessary.

The MPSA92 is ideal for this as it is a 300v part.

 

[manniraj]

Thanks X, much appreciated.

 

[hassan4119]

fh11

thanks so much for the share , nice work.

your welcome...use 330R inested of 150R resistant...if dont do this hi bias is in power mosfet...so dont forget.

 

[sumeshak]

APEX P-30

Thanks to Mile..

Thanks to all those helping minds...
Sounds superb!
Regards,
Sumesh

 

[hassan4119]

apex ax17

hi every one....who can help me about maximum of voltage rail for apex ax17؟

 

[still4given]

Thanks to Mile..

Thanks to all those helping minds...
Sounds superb!
Regards,
Sumesh

Congrats!