100W Ultimate Fidelity Amplifier

[apexaudio]

apex,
i follow all your model
specialy darlington output
regards

I have this old PCB, and I can draw pcb again, it's smal and simple pcb anyway. This amp was replaced with new http://www.diyaudio.com/forums/solid-state/162494-amplifier-motherboard.html post #4, but this is very good sounding amp.
Regards

 

[engel dela pena]

apex,
bd139
any replacement

 

[apexaudio]

apex,
bd139
any replacement

NPN in TO126 case... MJE340...

 

[engel dela pena]

miles,
is my heat sink small or this is fine for my a100 with darlington output

 

[apexaudio]

miles,
is my heat sink small or this is fine for my a100 with darlington output

Heatsink is to smal, but use extra fan and will work. BD139 must be on heatsink with TIPs,
Regards

 

[apexaudio]

For more power use 2SB1560/2SD2390 darlingtons.

 

[engel dela pena]

apex,
another good sounding amp
tnx to apex,
see bigger heat sink

 

[apexaudio]

apex,
another good sounding amp
tnx to apex,
see bigger heat sink

Valuable of this amplifier is that you can get high performance amplifier with available parts. Heatsink is OK for full power, what is rail voltage on your amp? There is no fancy look, but high-end sounding amp for sure.
Regards

 

[apexaudio]

apex,
another good sounding amp
tnx to apex,
see bigger heat sink

I can't see is there zobel network on output?

 

[engel dela pena]

I can't see is there zobel network on output?

what values can you suggest?
R?
C?
is R=100R
C=.47uf
is this fine?

 

[engel dela pena]

Valuable of this amplifier is that you can get high performance amplifier with available parts. Heatsink is OK for full power, what is rail voltage on your amp? There is no fancy look, but high-end sounding amp for sure.
Regards

40-0-40ac available transformer for testing darlington kelvin a100

 

[engel dela pena]

apex,
this kelvin is waiting for your active x-over
tnx

 

[apexaudio]

what values can you suggest?
R?
C?
is R=100R
C=.47uf
is this fine?

Use 10R/2W and 0,1uF/250V

 

[apexaudio]

40-0-40ac available transformer for testing darlington kelvin a100

Use 30-0-30ac for TIPs, 40-0-40ac is for BDWs or 2SB/2SD or use AX14 from post #1 with 2SA/2SC.

 

[apexaudio]

apex,
this kelvin is waiting for your active x-over
tnx

Subwoofer x-over?

 

[apexaudio]

Ax14

 

[apexaudio]

apex,
another good sounding amp
tnx to apex,
see bigger heat sink

D1 on D14 schematic reverted polarity! This is right polarity.

 

[engel dela pena]

D1 on D14 schematic reverted polarity! This is right polarity.

thanks,i will reverse this diode
i copy that not cerrected ladscape

 

[engel dela pena]

Subwoofer x-over?

yes

 

[apexaudio]

apex,
this kelvin is waiting for your active x-over
tnx

X-over for subwoofer will be post in thread:
http://www.diyaudio.com/forums/solid-state/167363-mic-line-eq-preamps.html
Regards