100W Ultimate Fidelity Amplifier

[mprivitera1]

you could order it from here

100W Ultimate Fidelity Amplifier

prasi

hi Mr. Prasi, for the potentiometer (P1) which type should I put? , I can't understand it! body type?

 

[kandimba]

Yes I have built it. Works well. Here are the files.

Hi Still, can you post the electronic diagram of this.

Thanks

Regards

 

[hassan4119]

OK I see. I thought you built an A40 for yourself. Nothing wrong with the A33. Beautiful amp.

hi still4ggiven.i made fh11 with 3pair irf640/9640
every things be good..but when power on for 3 to 5 second i have hom noise and pop up!!
please help me...i check circuit step by step..i cant fix this..
what i do?

 

[still4given]

hi still4ggiven.i made fh11 with 3pair irf640/9640
every things be good..but when power on for 3 to 5 second i have hom noise and pop up!!
please help me...i check circuit step by step..i cant fix this..
what i do?

I couldn't fix it either. I used a speaker protection with a delay to solve it. I never installed it into a case. Too many amps.

 

[fuego]

I use NE555 together with the A40 but protection it's too sensitive
to ten percent of the volume goes into protection
without connecting PRO everything is OK
what changes should I make to reduce sensitivity?
Thank you!

 

[kandimba]

I use NE555 together with the A40 but protection it's too sensitive
to ten percent of the volume goes into protection
without connecting PRO everything is OK
what changes should I make to reduce sensitivity?
Thank you!

How did you conected this protection to the Apex A40 amplifier ?

 

[apexaudio]

I use NE555 together with the A40 but protection it's too sensitive
to ten percent of the volume goes into protection
without connecting PRO everything is OK
what changes should I make to reduce sensitivity?
Thank you!

You must add overload detect circuit if you want use DC555 proect with A40, like this for SR300.

 

[hassan4119]

I couldn't fix it either. I used a speaker protection with a delay to solve it. I never installed it into a case. Too many amps.

its means that you have this problem too with fh11?
i made veryy amp such as holton 400 watt ....but i dont any problem
regards

 

[hassan4119]

I couldn't fix it either. I used a speaker protection with a delay to solve it. I never installed it into a case. Too many amps.

i bealeave that when one people make a diy amp....that must be work properly...with no problem's .....because i expend my time's and my money.....now i not happy with fh11....wish i made another holton 400watt ...

 

[fuego]

You must add overload detect circuit if you want use DC555 proect with A40, like this for SR300.

I have connected as in the drawing
now it's too late to make changes
It remains like DC and thermal protection

 

[nigelwright7557]

i bealeave that when one people make a diy amp....that must be work properly...with no problem's .....because i expend my time's and my money.....now i not happy with fh11....wish i made another holton 400watt ...

I recently built up a new design amp.
It had dc instability but I just put it down to having extra driver transistors.
In the end it was bad current source resistor ! I only found it by accident when I varied its value a bit to try to make it more stable.
I replaced the resistor and it is now very stable.

 

[burnmaster]

Congratulations fuego.
Please tell me where I can buy these arrows.
I need 4 pieces.

 

[fuego]

Congratulations fuego.
Please tell me where I can buy these arrows.
I need 4 pieces.

Thank you
VU Meter Header DB Pegelmesser fur Onkyo M-5000R HIFI Endstufe | eBay

 

[burnmaster]

Thank you so much.
And my Apex will be the same.

 

[fuego]

A40+P30

Thank you to all those who help us have what you build

YouTube

 

[burnmaster]

The music hit the ten.))))
In Bulgaria we call it право српско коло.

 

[44250]

you in Bulgaria say it right!

 

[still4given]

A40+P30

Thank you to all those who help us have what you build

YouTube

Very nice! Love the clear top to show off the DIY. Need some better speakers for such a fine amp.

I'm not crazy about the metal speaker jacks. I used them before and blew the outputs when a misplaced piece of metal fell on them and shorted them.

 

[avtech]

I'm not crazy about the metal speaker jacks. I used them before and blew the outputs when a misplaced piece of metal fell on them and shorted them.

Ouch!

 

[Vrystaat]

A40+P30

Thank you to all those who help us have what you build

YouTube

Fuego, very good looking amp, but have you maybe thought about ventilating holes in the top of the cover ?