100W Ultimate Fidelity Amplifier

[apexaudio]

This DC protect have AC off detect circuit to fast switch off relay and about +/-1V DC detect circuit.

 

[thimios]

The question is what is the probability that the output of the amplifier have +/-7V DC offset. Many protections have similar circuit for dc detection (working amp have output DC offset about +/-50mV max and broken is on rail voltage about +/-50V). If necessary I can modify circuit to have the +/-1V DC sensitivity.

If necessary I can modify circuit to have the +/-1V DC sensitivity.
Please do it!🙂

 

[kool lites]

Vtrigger for the triac is 1.5v (max)

Sent from my HUAWEI MT7-L09 using Tapatalk

 

[apexaudio]

If necessary I can modify circuit to have the +/-1V DC sensitivity.
Please do it!🙂

It has already been done in the previous post, and this DC detect is from F100 PSU+Protect.

 

[apexaudio]

Detection DC voltage below +/-0,5V it is possible with comparator circuit.

 

[thimios]

It has already been done in the previous post, and this DC detect is from F100 PSU+Protect.

Yes but the goal is to avoid the relay.🙂

 

[apexaudio]

Yes but the goal is to avoid the relay.🙂

Like this

 

[andrewlebon]

Hello apexaudio
greetings in post #5564 if overload resistance is made .5 10 watts
how many watts amp can be used for overload detection
warm regards
Andrew

 

[andrewlebon]

Hello apexaudio
greetings in post #5564 if overload resistance is made .5 10 watts
how many watts amp can be used for overload detection
warm regards
Andrew

 

[thimios]

Like this

Now we need someone who can redraw the pcb😉

 

[gaborbela]

Yes but the goal is to avoid the relay.🙂

I agree 🙂

 

[alex mm]

I like to take part in this project , I mean to layout the PCB .....

 

[still4given]

I like to take part in this project , I mean to layout the PCB .....

😀

 

[c08bm]

I like to take part in this project , I mean to layout the PCB .....

Please do, but share lay file too.

 

[vinski80]

This DC protect have AC off detect circuit to fast switch off relay and about +/-1V DC detect circuit.

Mr. Mile,

What would be the required AC supply voltage for this DC protect circuit?

Is this circuit applicable to any types of DIY amps?


Regards,

Vinski80

 

[apexaudio]

Mr. Mile,

What would be the required AC supply voltage for this DC protect circuit?

Is this circuit applicable to any types of DIY amps?


Regards,

Vinski80

AC is 2x25~40v from main transformer, protect can be use with any amp.
Regards

 

[vinski80]

AC is 2x25~40v from main transformer, protect can be use with any amp.
Regards

Thanks. I'm so excited to build this stuff.

By the way, will this circuit also protects the output transistors(amplifier unit) if ever the speaker terminal or the speaker itself shorted?

Regards,

vinski80

 

[apexaudio]

Thanks. I'm so excited to build this stuff.

By the way, will this circuit also protects the output transistors(amplifier unit) if ever the speaker terminal or the speaker itself shorted?

Regards,

vinski80

Yes if PRO pin is connected to emiter of NPN output transistors in positive rail.
Regards

 

[still4given]

It looks like the PRO portion is missing in the latest protect circuit

 

[apexaudio]

It looks like the PRO portion is missing in the latest protect circuit

PRO portion is add, but will work only with AX16, HV23...