900W H-class PA Amp with Limiter

[apexaudio]

hi apex,

i tried your darlington topology.and guess what everything was ok no abnormal
readings.no sagging of voltages. dc offset of 2mv.same reading on every collector.

then i switched back to normal driver stage with mje15032/33 .switched on
2.1mv dc offset.no voltage sagging everything normal.then i saw i forget to add
22ohm resistor which was connected to both emmiters of mje15032/33.as i
connect then every thing messes up.30 mv dc offset.voltages sags 60 to 38
and-60 to-14.different reading on every collector.what should i do.

thanks

ravs


be a vegeterian.....

Use darlington topology if work good on your amp.
Regards

 

[apexaudio]

i have 2X18VAC 50va..on 1000uf/35v i have 22vdc..

thank u sir....

Use 2x20vac, and you must have 28V DC on 1000uF/35V.

 

[irvynejay]

bias

It's OK, bias must be readjust.

Hello mile's can you share an idea what changes to be done when triple ef to be use likewise proper adjustment of bias

 

[andrewlebon]

triple ef bias

hi apexaudio
greetings made yourtriple ef can you tell biasing method will add 2 more output pairs
thanking you
andrew lebon

 

[ChingTan]

ready for mounting 6th 2 channel H900
Thanx to Miles

nice project

is the all parts available in our city?

 

[irvynejay]

nice project

is the all parts available in our city?

only ir2117 ordered from china likewise with the trannies

 

[irvynejay]

nice project

is the all parts available in our city?

taga butuan ka asa dapit bro?


your also from butuan bro?

 

[ravslanka]

Use darlington topology if work good on your amp.
Regards

hi apex,

cant use tripple darlington as pcb dont allow this.i have to wire them seperaterl

cant i raise the value of resistor say 82/100 ohm or add a 100nf across
the resistor .raising the resistor value 100 ohms makes thing normal.
i want to complete it as soon as possible

thanks in advance

ravs

be a vegeterian....

 

[Qmara]

dear mr Mile,

if i use the +/-45 vdc for +/-MV and 65 vdc for +/-HV, is that ok ?
and how about the SQ for that voltage ?
one more what about deficiency ?

thank you.

 

[soerdjanto]

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

 

[apexaudio]

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

Nice work, thanks for picture, any coment about sound?
Regards

 

[aman khalsa]

hello sir apex

can u pls share VERTEX amp with diyer's...

thanx...

 

[engel dela pena]

waiting for MJL🙂

 

[wattaniya]

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

WHICH PSU YOU USE?
WHAT IS YOUR TRANSFORMER DIMENSIONS AND THE PRIMARY WIRE GAUGE, SECONDARY WIRE GAUGE.?

 

[paul_usa_22]

hello mr apex

hello mr apex i have 2 question ..how can i adjust the bias in h900? and the MV suply the power tranzistor? thank you

 

[wattaniya]

hello apex sir can u share the h900 pcb layout top and bottom in pdf format.

 

[wattaniya]

whats the differents between h900 and h900v2?
can anybody post top and bottom both pcb layouts in pdf format

 

[engel dela pena]

h900v2 pcb is used if diode sfa1603 is not available (this diode for v1)
h900v2 pcb use double diode or back to back diode like mur1620

 

[andrewlebon]

hi apexaudio
greetings please if possible can you tell how to bias triple ef stage have made it 6 pairs in output only waiting for biasing instructions
thanking you
andrew lebon

 

[comasus]

hello apex does this amplifier is suitable for drivining LF Speakers