100W Ultimate Fidelity Amplifier

[apexaudio]

FF30

 

[masood251]

Dear sir
In ax11 ampl.can i use njw038gand0281g in place of bd249 and 250.thank .

 

[still4given]

Dear sir
In ax11 ampl.can i use njw038gand0281g in place of bd249 and 250.thank .

 

[masood251]

Thanks dear .you use in ax14.i am asking about ax11

 

[nigelwright7557]

Use this schematic

Have you got shares in transistors companies ? lol
I can get a good sounding amp with 1/3 as many transistors.

 

[hassan4119]

what's your idea about ax17? you made that?
how can i replace a1837/c4793 with other's such as tip41/42 or tip31/32?!!! what's max power suplly?

 

[Hicoco]

APEX PSU 60 with protect, PCB NOT YET TESTED

 

[hassan4119]

APEX PSU 60 with protect, PCB NOT YET TESTED

for diy use please design in one layer.

 

[karachay]

.

hi where can i find that gerber files for ax14

 

[Hicoco]

Gerber APEX PSU 60 with protect, NOT TESTED

 

[still4given]

hi where can i find that gerber files for ax14

 

[masood251]

sir
in ax11 i use mpsa42 with changing collector,emitter resistors in place of mpsa13 .my voltage drop and mpsa42 burst.please give me solution.thanks

 

[suryadi5417]

AX14 TEF

Preparing for TEF ... like the other else

 

[kandimba]

Hi Mister Mile, should I put the transistors marked with red stars (MJE340,350) on the main heatsink.

 

[kandimba]

Posdrav

 

[zolek]

Apex-NE555 DC Protect

Hi there . I use the protection shown in the picture for ax14, but when the bass goes higher, the capacitor marked with a red circle inflates.

 

[masood251]

Yes but resistors around MPSA42 must be change, use 2k2 from base to colector and 1k from base to emiter.

Sir if i use bc517 in place of mpsa13 what cpllector and emitter resistor would be change.thanks dear

 

[Sabbath]

Hi there . I use the protection shown in the picture for ax14, but when the bass goes higher, the capacitor marked with a red circle inflates.

There are at least 2 mistakes on this PCB. 4148 at the left of NE555 must be reversed and also 4th leg of NE555 must be connected with 680K resistor, 100/63 cap must be non-polar. Also sensitivity on negative input voltage of this protection is weak (about 4-5v). But I used it in couple projects and it saved my speakers couple times though...

 

[zolek]

There are at least 2 mistakes on this PCB. 4148 at the left of NE555 must be reversed and also 4th leg of NE555 must be connected with 680K resistor, 100/63 cap must be non-polar. Also sensitivity on negative input voltage of this protection is weak (about 4-5v). But I used it in couple projects and it saved my speakers couple times though...

Hi. Thanks for the help.
But even with the correct component direction, the same error is a bit bass, capacitors are over.
I'll look at the transistors and ne555.

 

[vargasmongo3435]

Hi there . I use the protection shown in the picture for ax14, but when the bass goes higher, the capacitor marked with a red circle inflates.

some one is using my macro designs cool 😛