Pass "DeLite" Amp from BAF

[Nelson Pass]

No , that was meant in parallel to the speaker , but at the amplifier side before the cable .

I usually use around 100 ohms there unless I need to
develop a specific source impedance.

😎

 

[ra7]

Yes, I have used 1k ohms in parallel with the speakerto keep the output at ground.

Thank you for the other values Papa. I have been simulating with a 10k pot sandwiched between 1.5k resistors. Will try with the new values.

 

[angcl]

I usually use around 100 ohms there unless I need to
develop a specific source impedance.

😎

Hi Mr Pass,

There are two capacitors on your diagram,one is output cap (1000uf) ,how about the other cap ?

both Fet can use IXTH6N50d2 ?


Thanks
🙂

 

[Tea-Bag]

Hi Mr Pass,

There are two capacitors on your diagram,one is output cap (1000uf) ,how about the other cap ?

both Fet can use IXTH6N50d2 ?


Thanks
🙂

I think
Left cap 1,000, output (right cap) 10,000. Although a lower right cap will be good, just acts like a first order crossover if too low.

 

[Nelson Pass]

I think
Left cap 1,000, output (right cap) 10,000. Although a lower right cap will be good, just acts like a first order crossover if too low.

Yes. 😎

 

[angcl]

Yes. 😎

Thanks Mr Pass and Tea bag.

what is the V+ for this circuit ? can use exsiting V+ ? currently use 60V AC .

Thanks

 

[ra7]

60 VAC would give approximately 80V rails... this is too much for the circuit with the transistor CCS. I would say it should be more like 30-40V.

 

[stefanobilliani]

Works perfectly . Just splitted back the PS into dual 30 V , with 2 bridges .
Lots of capacitance and completely quiet 😉

 

[Tea-Bag]

Works perfectly . Just splitted back the PS into dual 30 V , with 2 bridges .
Lots of capacitance and completely quiet 😉

Dual Rail? That's not what the schematic looks like. Assume bottom Source connects to ground here, V+ only.😕 Nice work.

 

[Melon Head]

Maybe he means dual mono

 

[stefanobilliani]

Maybe he means dual mono

Yes indeed dual mono , fantastic ! 😉

 

[stefanobilliani]

Dual Rail? That's not what the schematic looks like. .

no no single rail . 30 volts . I have a dual 25 V 500 watt transformer , and each secondarie has a bridge . Then the use was in series for the 60 volts , and dual mono 30volts, which I like a lot .

 

[ra7]

What is the drain voltage on the bottom FET? And the bias current?

 

[stefanobilliani]

What is the drain voltage on the bottom FET? And the bias current?

The current is 1,6 amp , the voltage at the drain is half the rail .

 

[Tea-Bag]

Nice work, stephanobilliani, is the 5k a pot in your case? I wonder if this will work well with the R085's.

 

[stefanobilliani]

Thank you ! Yeah , it is a pot 🙂

 

[stefanobilliani]

Schematic , how built . Should be all correct except for the naming of the D Fets ( Q1 and Q2 )and for C4 which is actually 10000uF 😉

 

[ra7]

Thanks Stefano. This is great!

 

[stefanobilliani]

Thanks Stefano. This is great!

Welcome ! 🙂 And yes , it's great indeed.

 

[stefanobilliani]

Though I think something is wrong . Becouse measuring voltage across C3 it look as it is " inverted " in polarity . Thats strange . I guess I am missing something ....