100W Ultimate Fidelity Amplifier

[masood]

I think there is no pcb for three pairs of outputs to this ax-14 can i use sr200 for PA it has three pairs of outputs and also need good sound quality sound even for PA speakers,does it fit for this purpose or shall i use ax-14 anyway please guide me

shrea,
where is sr200 pcb and schematics,how can u create pcb do you have any software for pcb plz share me also?with best wishes masood

 

[shreya]

shrea,
where is sr200 pcb and schematics,how can u create pcb do you have any software for pcb plz share me also?with best wishes masood

Read the thread from first page

http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier.html

 

[Hadighorbani]

Use PA protect from B500 thread post #84.
http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-9.html

thank you sir
bat ...
i need one shematic with a littel part.
this is big for my project.
and i dont have 18VAC.
this is problem to me
sorry for my bad engilish and conditions.

 

[comasus]

Hi! Mile

can i use ax-14 amplifier at +/-65vdc with 3 pairs of output transistors keeping the compensating capacitors 22pf??

 

[apexaudio]

thank you sir
bat ...
i need one shematic with a littel part.
this is big for my project.
and i dont have 18VAC.
this is problem to me
sorry for my bad engilish and conditions.

Use protect from AX14P , this protect can be add to any amp.

 

[apexaudio]

Hi! Mile

can i use ax-14 amplifier at +/-65vdc with 3 pairs of output transistors keeping the compensating capacitors 22pf??

Yes you can, but scope output to be sure.

 

[comasus]

Yes you can, but scope output to be sure.

with 100pf there is no need of scope?

 

[apexaudio]

with 100pf there is no need of scope?

Always scope if you can, but it will work anyway

 

[charlestpt]

Can I use this 100W Ultimate Fidelity Amplifier for this type of speakers at home

 

[masood]

Read the thread from first page

http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier.html

shreya;
thanks,but how can you creat/make pcb,s?thanks .

 

[charlestpt]

Can I use this 100W Ultimate Fidelity Amplifier for this type of speakers at home

JBL GT6-S266

 

[comasus]

Hi! Mile

Today I have made another pcb of Ax-14 and while testing R19 220ohms is getting smoke very instantly as soon as i switch on the amp what could be the problem ?

R19 must be high wattage? but R18 was fine

tested with 100ohms instead of rail fuses at +/-68volts

 

[44250]

Are you sure that it is soldiered as it should be? By the schematics i can´t see how can R19 burn out over 10kOhm,47kOhm... Check is there unwanted soldier connection between R33 (emiter resistor) and R19 that bourns. Check well because it can be as tiny as hair.

 

[comasus]

Are you sure that it is soldiered as it should be? By the schematics i can´t see how can R19 burn out over 10kOhm,47kOhm... Check is there unwanted soldier connection between R33 (emiter resistor) and R19 that bourns. Check well because it can be as tiny as hair.

Found the problem

C4 inserted wrongly (reverse polarity) and blasted this could be the reason why R19 getting heated up right?

 

[comasus]

Hi! Mile

I have done another ax-14 the problem is dc offset is about 5mV and is not stable while there is an input signal is present its going to 32mV and decreasing changing continuously

I have used 2sc and 2sa instead of Mje and those are only getting warm at +/-68vdc and remaining output transistors are cool checked at low volume with single pair

what i have to do to stable the dc offset?

 

[wattaniya]

Hi! Mile

I have done another ax-14 the problem is dc offset is about 5mV and is not stable while there is an input signal is present its going to 32mV and decreasing changing continuously

I have used 2sc and 2sa instead of Mje and those are only getting warm at +/-68vdc and remaining output transistors are cool checked at low volume with single pair

what i have to do to stable the dc offset?

which version u made ?
ax14 supply voltage is 50v with one pair.
any changes u made?

 

[44250]

Found the problem

C4 inserted wrongly (reverse polarity) and blasted this could be the reason why R19 getting heated up right?

Yes,that could be the reason of bourning 220R resistor.

I have used 2sc and 2sa instead of Mje and those are only getting warm at +/-68vdc and remaining output transistors are cool checked at low volume with single pair

Wich transistor have you used instead MJE ?

 

[Hadighorbani]

thanks guys

Use protect from AX14P , this protect can be add to any amp.

very sorry sir bat i am clear
i mean amator
PLZ hellp me more than ever
thanks

 

[comasus]

Yes,that could be the reason of bourning 220R resistor.



Wich transistor have you used instead MJE ?

2sc4793 and 2sa1837

 

[44250]

2sc4793 and 2sa1837

does it work now?