100W Ultimate Fidelity Amplifier

[prasi]

Mr. Mile,
I want to use it for 56V supplies.
Pl. let me know if the attached, based on your schematic, is ok.

regards
Prasi

 

[apexaudio]

Mr. Mile,
I want to use it for 56V supplies.
Pl. let me know if the attached, based on your schematic, is ok.

regards
Prasi

For 56V use 30V zener, 24V rele and remove 1uF cap...

 

[apexaudio]

F9B made by Dragan

 

[prasi]

For 56V use 30V zener, 24V rele and remove 1uF cap...

Mr. Mile,
Thanks. Here is a compact minimalist version of your softstart with 24V relay that can be placed between switch and trafo.

regards
prasi

 

[fuego]

Yesterday I tried the F100PSU and no reaction from the relay, just the LED protector is on. I tested at +/- 53v DC.
Where am I wrong?

 

[robydream]

APEX P8 HeadAmp/Preamp.

I make PCB few weeks ago so i posted it here for someone who wants to build it.

 

[44250]

Yesterday I tried the F100PSU and no reaction from the relay, just the LED protector is on. I tested at +/- 53v DC.
Where am I wrong?

check and recheck, many of us have done it and it was working unit... by the way, nice work really!

 

[fuego]

check and recheck, many of us have done it and it was working unit... by the way, nice work really!

I found where I was wrong
where I needed 220k I mounted 220ohm
Beginner's mistake

 

[rsavas]

APEX EX14 simulation results

Hi Mile,

I simulated EX14 in ltspice. I can not get thd below 0.1%. I wonder why that is, any ideas? I will attach the ltspice sim file and the schematic printed page for review.
It is not the models, I use these models in other sims with good success. OPS bias is running at 55mA, driver stage is at 12mA. Just having the red led in the bias generator, would not provide enough OPS bias so I added a small R to get it to where it was reasonable.
Has anyone ever built this amp design?
Thx
Rick

 

[smartx21]

I found where I was wrong
where I needed 220k I mounted 220ohm
Beginner's mistake

I always measure every component before laying on the board.😎

 

[bimo]

Hi Mile,

I simulated EX14 in ltspice. I can not get thd below 0.1%. I wonder why that is, any ideas? I will attach the ltspice sim file and the schematic printed page for review.
It is not the models, I use these models in other sims with good success. OPS bias is running at 55mA, driver stage is at 12mA. Just having the red led in the bias generator, would not provide enough OPS bias so I added a small R to get it to where it was reasonable.
Has anyone ever built this amp design?
Thx
Rick

http://www.diyaudio.com/forums/solid-state/164093-100w-ultimate-fidelity-amplifier-993.html#post5213636

 

[anoopkrajan]

Which is the best sounding amplifier in 80-100 W range ?

 

[apexaudio]

Which is the best sounding amplifier in 80-100 W range ?

YouTube

 

[grand zero]

Hello, excuse that not on the topic I apply, can give a chart on the strengthener of apex a2 sap

 

[grand zero]

Service manual apex a2 sap

 

[sumeshak]

Siiggestions for Pre amp

Hi,
Hi Mr. Mile...
I wish to make a discrete pre-amp with volume control.
Can you please suggest a good preamp?
My Power amp gain is 27dB.
Signal sources will be less than 1V (500mV t0 700mV)
Thanks and regards,
Sumesh

 

[Gurpreet Turna]

One transformer 48-24-0-24-48 300VA

I finish my transformer. PSU Schematic layout for HX11 please

 

[apexaudio]

Hi,
Hi Mr. Mile...
I wish to make a discrete pre-amp with volume control.
Can you please suggest a good preamp?
My Power amp gain is 27dB.
Signal sources will be less than 1V (500mV t0 700mV)
Thanks and regards,
Sumesh

Go to P30
YouTube
Regards

 

[prasi]

Sumesh,
there is also SB 3.1 , much simpler and with common BJT's.
output coupling caps can be removed, if amp has them.

 

[apexaudio]

P2 Line Preamp