100W Ultimate Fidelity Amplifier

[keantoken]

Sort of like this:

http://www.diyaudio.com/forums/soli...k3-cfa-pre-phone-amp-very-low-distortion.html

 

[xrk971]

Yes, I was thinking same thing. I have one of those reserved. Sort of dreading how many parts it will take to build.

 

[apexaudio]

A22

Zero Global Negative Feedback Amplifier.

 

[ammel68]

Zero Global Negative Feedback Amplifier.

Mr. Mile, how about some circuits that do not use coupling caps on the outputs?

Thanks.

 

[prasi]

Yep, where prasi could very well be the master of Eagle around here, I think Alex could very well be the Sprint master.😀

I am just a novice compared to Alex.
Hi Eric,
Here are the gerbers
reg
Prasi

PS: Not tested

 

[apexaudio]

Mr. Mile, how about some circuits that do not use coupling caps on the outputs?

Thanks.

There is no DC offset stability without GNF, with output cap you don't need DC speaker protect 😉
Regards

 

[behrad]

hi to all
i want build sr150 but i dont have any pcb layout from it
if you have pcb layout please give me

respectfully

 

[olafk]

hi to all
i want build sr150 but i dont have any pcb layout from it
if you have pcb layout please give me

respectfully

Goto Post #1740 and following posts here: http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier-174.html

regards Olaf

 

[audio3773]

wellcome

hi to all
i want build sr150 but i dont have any pcb layout from it
if you have pcb layout please give me

respectfully

http://www.diyaudio.com/forums/solid-state/292226-directory-apex-audio-amplifiers-7.html#post4769750

 

[behrad]

Goto Post #1740 and following posts here: http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier-174.html

regards Olaf

thanks mr olaf😉

 

[ammel68]

There is no DC offset stability without GNF, with output cap you don't need DC speaker protect 😉
Regards

Sorry I wasn't clear. I was referring to preamp circuits without coupling caps on the outputs, not power amps.

 

[camelator]

Hi,
I have questions about the PX6 preamp.
There are 2 polarized caps, 10uf and 220uf.
Is 16v low esr enough?

I presume the 10uf cap is for DC blocking. If I block DC, should I have a DC blocking cap on the FX8 amplifier?
What should be the best place to put the DC blocking cap? The preamp? The amp? both of them?

many thanks!

 

[prasi]

Hi,
I have questions about the PX6 preamp.
There are 2 polarized caps, 10uf and 220uf.
Is 16v low esr enough?

I presume the 10uf cap is for DC blocking. If I block DC, should I have a DC blocking cap on the FX8 amplifier?
What should be the best place to put the DC blocking cap? The preamp? The amp? both of them?

many thanks!

haven't seen px6, but generally, if dc blocking cap is on power amp, is enough. no need for it on preamp...

 

[mrleongalaxyum]

Apex P30ZF

Hello!
I'm new to this forum so sorry if I'm missing out something obvious. I would like to get toner transfer pcb layout of P30ZF for my diy Apex A75 by Mile Slavković ☺

 

[gannaji]

Hi,
I have questions about the PX6 preamp.
There are 2 polarized caps, 10uf and 220uf.
Is 16v low esr enough?

I presume the 10uf cap is for DC blocking. If I block DC, should I have a DC blocking cap on the FX8 amplifier?
What should be the best place to put the DC blocking cap? The preamp? The amp? both of them?

many thanks!

Dear Camelator,
Can you kindly post the circuit for the Pre amp PX6?
gannaji

 

[AndrewT]

Hi,
I have questions about the PX6 preamp.
There are 2 polarized caps, 10uf and 220uf.
Is 16v low esr enough?

I presume the 10uf cap is for DC blocking. If I block DC, should I have a DC blocking cap on the FX8 amplifier?
What should be the best place to put the DC blocking cap? The preamp? The amp? both of them?

many thanks!

You don't need both.
If you have both, it is more flexible if the lower quality one can be bypassed.
Dual RCA outputs, one AC coupled and one DC coupled (and labelled) is ideal.

 

[apexaudio]

P6

Line Preamp

 

[camelator]

Line Preamp

Hi Mr Mile,
many thanks for this update.
If my understanding is correct:

1/ I can now put 7824/7924 regulators on my 35VDC PSU. It is a valuable update.

2/ There is two caps to block DC : 2u2 cap at the input and 10uf cap at the ouput

Do I need these caps as I already have DC blocking caps on my amplifier (electrolytic + orange drop) ?

If yes, Is it better if I copy what I did on the amplifier : polarized cap + orange drop ?

Many thanks.

regards,

Christian

 

[apexaudio]

Hi Mr Mile,
many thanks for this update.
If my understanding is correct:

1/ I can now put 7824/7924 regulators on my 35VDC PSU. It is a valuable update.

2/ There is two caps to block DC : 2u2 cap at the input and 10uf cap at the ouput

Do I need these caps as I already have DC blocking caps on my amplifier (electrolytic + orange drop) ?

If yes, Is it better if I copy what I did on the amplifier : polarized cap + orange drop ?

Many thanks.

regards,

Christian

Use this +/-24V regulator, you need blocking caps for proper input bias.
Regards

 

[AndrewT]

You don't need both.
If you have both, it is more flexible if the lower quality one can be bypassed.
Dual RCA outputs, one AC coupled and one DC coupled (and labelled) is ideal.

.......................
2/ There is two caps to block DC : 2u2 cap at the input and 10uf cap at the ouput

Do I need these caps as I already have DC blocking caps on my amplifier (electrolytic + orange drop) ?...............