100W Ultimate Fidelity Amplifier

[Joel Wesseling]

"Prasi have made a very nice and compact stereo amplifier for LM1875T"

That's great, I'll be trying that one!

 

[Joel Wesseling]

AX14 is great. 4 Channels running. Need some etching on front and rear panels

 

[Elias Zacharopoulos]

AX14 is great. 4 Channels running. Need some etching on front and rear panels

Nice. Will you use it as Stereo Bi-amplification amplifier for power hungry speakers ?

Elias

 

[Joel Wesseling]

Nice. Will you use it as Stereo Bi-amplification amplifier for power hungry speakers ?

Elias

Active 3way for 300HZ cross point. nice way to integrate the woofers in room and design the mid/tweeter passively, measuring outdoors on a ladder. Less weight carrying the mid and tweeter up a ladder..

 

[apexaudio]

AX14 is great. 4 Channels running. Need some etching on front and rear panels

Nice work,
Regards

 

[Elias Zacharopoulos]

Nice work,
Regards

I can't find any real proper pcb for this amplifier.
To make it clear,
1) Q8 and Q9 have to be connected to the heat sink to make the thermal feedback real efficient
2) the butceral have to be on board
AND
3) NEEDS TO be somewhere an extended description of the circuit (some link if I have mist it ?)
Of course I can follow the way xrk is following to his amplifiers and thermally connect these 2 transistors screwing them on top of the other on the heat sink transistors using sort cables
Happy new year Mile

Elias

 

[Joel Wesseling]

the butceral have to be on board

"butceral" what is this? Thanks!

 

[Vunce]

boucherot cell:
‘AKA’ Zobel network

 

[Joel Wesseling]

Thanks!

 

[44250]

I can't find any real proper pcb for this amplifier.
To make it clear,
1) Q8 and Q9 have to be connected to the heat sink to make the thermal feedback real efficient
2) the butceral have to be on board
AND
3) NEEDS TO be somewhere an extended description of the circuit (some link if I have mist it ?)
Of course I can follow the way xrk is following to his amplifiers and thermally connect these 2 transistors screwing them on top of the other on the heat sink transistors using sort cables
Happy new year Mile

Elias

can you provide documents on Wich you have based quoted post,i am curious? thanks in advance

 

[Elias Zacharopoulos]

can you provide documents on Wich you have based quoted post,i am curious? thanks in advance

??????????? 🤔 experience maybe ?

 

[Joel Wesseling]

"Q8 and Q9 have to be connected to the heat sink to make the thermal feedback real efficient"

Technical info on this would be nice. Thanks! Q10 is mounted on top of O/P transistor.

 

[44250]

??????????? 🤔 experience maybe ?

i have not questioned your experience,i do not know you, i just asked if you could \ would post some files,so that i could also learn something. thanks anyway.

 

[Joel Wesseling]

boucherot cell - weird thing is, I haven't had oscillation issues with non-zobel amps, but had a serious one with a zobel amp.

 

[Elias Zacharopoulos]

boucherot cell - weird thing is, I haven't had oscillation issues with non-zobel amps, but had a serious one with a zobel amp.

depends on how "capacitive" is your load (x-over +driver). I'm mainly referring for the tweeter / high-pass section of (at least) 2-way speaker (also WAF / SAF speakers) & bi-amplification

Elias

 

[Makxx84]

Hi, Prasi!
Can you share PCB AA9MD and AB100 in srint layout format? I also want to repeat these amplifiers! P.S. I apologize for my poor English!

 

[apexaudio]

APEX FH12

 

[Wik]

after 12 year , this amp still the best?

 

[44250]

Wik - where is this earlier post with this schematic in it? there was FX14,i can not recall FH12?

 

[stewin]

APEX FH12

can irf9540n and irf540n be used in this apex fh12 amp?