900W H-class PA Amp with Limiter

[vargasmongo3435]

hi vargasmongo .it looks o.k it should work.

thank you just a few minutes ago Mr. Miles told me that is possible

 

[QQ12e5k1]

I found a errata on one of the bleeder resistor here is the updated file I might be wrong but I can see that there are two bleeder resistors connected on the same -120V spot is odd to me so I changed but the first files still the same so you can see what I mean

If you don't mind, maybe you can make another version with this diode.

Regards

 

[vargasmongo3435]

If you don't mind, maybe you can make another version with this diode.

Regards

I can do that sure also yesterday I found out that the PNP transistor BF421 is obsolete and no longer available "they can be found on eBay well I rather change that" so I changed for KSP92 that have the same characteristics the only difference is the pins, the BF421 is E C B and the KSP92 is E B C so I have to update the PCB to accommodate the KSP92 and also MPSA92 can be use I will leave the update Sprint Layout 6 file here but, at the same time I will leave the original layout intact on the same file

 

[QQ12e5k1]

I can do that sure also yesterday I found out that the PNP transistor BF421 is obsolete and no longer available "they can be found on eBay well I rather change that" so I changed for KSP92 that have the same characteristics the only difference is the pins, the BF421 is E C B and the KSP92 is E B C so I have to update the PCB to accommodate the KSP92 and also MPSA92 can be use I will leave the update Sprint Layout 6 file here but, at the same time I will leave the original layout intact on the same file

I guess BF421 still produce by KEC Korea Electronic.
Why don't you design pcb for H900P, latest sch from Apexaudio?
It has more vas current and add vi limiter.

 

[vargasmongo3435]

I guess BF421 still produce by KEC Korea Electronic.
Why don't you design pcb for H900P, latest sch from Apexaudio?
It has more vas current and add vi limiter.

oh I didn't know that there was a H900P is there a link of the layout PCB?

 

[vargasmongo3435]

Apex 900 PSU with optional bridge rectifier GBJ5010

 

[QQ12e5k1]

Apex 900 PSU with optional bridge rectifier GBJ5010

900W H-class PA Amp with Limiter

Seems Mile didn't share yet the bottom side, only top side.

 

[vargasmongo3435]

900W H-class PA Amp with Limiter

Seems Mile didn't share yet the bottom side, only top side.

is fine I understand him but at least I can try this one

 

[vargasmongo3435]

hey question the H900 does not need output coil?

 

[vargasmongo3435]

hello guys question does Apex H900 need zobel+resistor coil or not?

 

[kandimba]

hello guys question does Apex H900 need zobel+resistor coil or not?

Yes

 

[vargasmongo3435]

Yes

it does? wow I didn't not see that I think I can make a small PCB for that thank you hey, what schematic is that? can you post the whole schematic if not I understand I spend a few hours tuning the layout look a lot better I think

 

[kandimba]

it does? wow I didn't not see that I think I can make a small PCB for that thank you hey, what schematic is that? can you post the whole schematic if not I understand I spend a few hours tuning the layout look a lot better I think

I Vargasmongo, no I cant, because this is the only image tha I have

 

[vargasmongo3435]

I Vargasmongo, no I cant, because this is the only image tha I have

is cool thank for replay about the zobel


regards
Juan

 

[vargasmongo3435]

hi ya'll I decide to add the coil why not right? I'm not sure if this coil might be 10uH I think need to double the turns to double layer air coil I put some number and this can be a really expensive project to do but at least I have all the designs saved

 

[Ahmadhafi]

it does? wow I didn't not see that I think I can make a small PCB for that thank you hey, what schematic is that? can you post the whole schematic if not I understand I spend a few hours tuning the layout look a lot better I think

pls share me email layout ax 14 clas h sir send me email cah.galaow@gmail.com

 

[vargasmongo3435]

pls share me email layout ax 14 clas h sir send me email cah.galaow@gmail.com

sorry I send wrong layout you say AX-14 why? we are on Apex H900 design not 14 clas h

 

[Ahmadhafi]

sorry I send wrong layout you say AX-14 why? we are on Apex H900 design not 14 clas h

ax-14 clas h sir pls send me

 

[vargasmongo3435]

ax-14 clas h sir pls send me

sorry I don't have it please keep subject of Apex H900 only that is what I'm doing

 

[vargasmongo3435]

I'm confused about top rail comutation mosfets

Hi I think this might be the lat post about me studies of the Apex H900 and I was able to simulated and works really well a lot more power than what I really need it is capable of give more than 1200W to 4 ohms load the THD is high after it reach 1250W about 0.6% THD not bad I think the only thing that got me confused is that the +HV 120V the mosfets orientation the simulation results is weird if I place the D drain to +HV120 to be honest I'm not so familiar with mosfets so will this does not matter? I really don't want to made a mistake and change the layout clone I did if that does not matter please let me know



I think most be the simulation but I want to be sure