900W H-class PA Amp with Limiter

[desislavov]

Hi , friends !

Can someone share a lay or lay6 file for H900 circuit PCB

Thanks in advance !!!

 

[masood251]

My stepper is not working how can i check it please any one explain as step by step thanking you.

 

[Mfinzi]

Mfinzi

Greetings Folks

My transformer is 84v-42v-0-42v-84v would this be appropriate for the H900 power amp. Regards

 

[moore4889]

H900 darlington,,with 5 pairs output,,2nd channel...

An externally hosted image should be here but it was not working when we last tested it.

 

[moore4889]

Greetings Folks

My transformer is 84v-42v-0-42v-84v would this be appropriate for the H900 power amp. Regards

You can use your transformer sir..and proper cooling (heatsink)..Enjoy!

Regards

 

[neojie]

Hello Everyone!
I think this is my 1st ever post here.... I just wanted to share my Apex H900TEF... Hope someone who built this Amplifier will be able to review this so others may be able to build using my layout. Once someone confirms that the schematic is correct I will share my gerber file or pcb layout....


Thank You

 

[apexaudio]

Hello Everyone!
I think this is my 1st ever post here.... I just wanted to share my Apex H900TEF... Hope someone who built this Amplifier will be able to review this so others may be able to build using my layout. Once someone confirms that the schematic is correct I will share my gerber file or pcb layout....


Thank You

View attachment 735717

View attachment 735718

Nice work, I like your idea to use car fuses,
Regards

 

[apexaudio]

APEX TD1800

 

[ChingTan]

Wow i’m so exited to make it

 

[andrewlebon]

Hello apex
greetings is apex TD1800 tested schematic would like to try it

warm regards
Andrew

 

[ialvega]

hello how are you, can you please give me the pcb of the h900 that you did, thanks my email iavg1976@hotmail.com I thank you

 

[neojie]

Nice work, I like your idea to use car fuses,
Regards

Thank you Sir.

I found some discrepancies on my schematic/layout and I'm rectifying it.

 

[neojie]

APEX TD1800

Wow another ONE! This well make me busy again. Thank you Sir Mile.

 

[deo]

Mackie SWA1801?(TD part).

 

[apexaudio]

Mackie SWA1801?(TD part).

TD1800 use HCPL3120 igbt mosfet gate driver.

 

[neojie]

TD1800 use HCPL3120 igbt mosfet gate driver.

Hello Sir Mile,

Can I use HCPL-3130 instead of 3120 & IRFP4110 in IRFP250N?

Kind regards.

 

[moore4889]

TD1800 use HCPL3120 igbt mosfet gate driver.

hi sir mile..was the schem tested?this is another great project to build..thank you sir..

 

[apexaudio]

Hello Sir Mile,

Can I use HCPL-3130 instead of 3120 & IRFP4110 in IRFP250N?

Kind regards.

HCPL3130 can be use but you must use 200V mosfets.

 

[NMOS]

HCPL3130 can be use but you must use 200V mosfets.

Dear Sir,

is circuit description available ?

1...only 5 (10) Toshiba 2 Sc 5200 / 2 SA 1943 Output devices Rail 140 V +/- ?

.. 140 V rail with Toshiba 2 Sc 5200 / 2 SA 1943

how can this amp work stable if Vceo max. 230 V for this ttransistors ?

Vceo is 230 V for this transistors, rail should be max 115 V


How is it possibile this amp can work stable and not violate SOA from output devices and not get second breakdown?


sorry, for this question, but long time before have import from China 50 pcs. PA Amp with similar rail +/- 145 V

60% amplifier fail within few weeks after sold. second breakdown
Toshiba 2 Sc 5200 / 2 SA 1943

 

[NMOS]

I see 2 Rail

18V

and 140V

Is is correct to say.... in standby mode amp running with separate 18 V Rail protect with MUR 420 from High Voltage Rail ?

if outpower required HCPL Mosfet driver add Voltage after MUR 420 ?

Is it corrcet, .....this amp need only 1 big Rail to work ,

the 18V standby Rail can be small PSU


In this case 18V standby rail,...the amp have very high efficiency

but can this design work stable with only 5 output devices and drive big 18 inch subwoofer @ 140 V rail ?

I remeber, old classic class AB have already 5 output devices for 400 W RMS @ 4 Ohm 80V Rail and 50 % energy convert to heat


sorry my english not so good