Studio Reference Amplifier

[apexaudio]

I would like to have information on this PCB:
APEX B500
Not if you will have in pdf side copper components, the diagram, pcb size

,,,

This thread is about 'Studio Reference Amp', post about B500 in thread http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-231.html
Regards

 

[SERGIODS]

I'll Share with you, you must give in order to relay protector speaker module can work as protect.

Thanks, Damhuri, dear also ask the question that votaje nuwan also supports as naximo + - xxVoltios;
To suggest as the sego: be like saying apex bias adio (20th to 30th) or that will.
Ojala and understand my questions.

,,,,,​

 

[SERGIODS]

This thread is about 'Studio Reference Amp', post about B500 in thread http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-231.html
Regards

Thanks, Apex Audio Right that's what I was looking for but could not find it anywhere that information, thank you very much,,,.

 

[veljko]

@Apexaudio

In place of Toshiba-s MJL21193/94 ? I have them home. Allso i have 1000u/100V good elcos, can i use them in place of 470u?

In place of mje350/340 how about C3503/A1381? Much better tr for VAS

 

[44250]

hope everyone will see...

studio reference with to3 output transistors,pcb done by member d.veljkovic:

corrected to3 version...

 

[44250]

@Apexaudio

In place of Toshiba-s MJL21193/94 ? I have them home. Allso i have 1000u/100V good elcos, can i use them in place of 470u?

In place of mje350/340 how about C3503/A1381? Much better tr for VAS

the questions remain...Mile where are you?

 

[apexaudio]

@Apexaudio

In place of Toshiba-s MJL21193/94 ? I have them home. Allso i have 1000u/100V good elcos, can i use them in place of 470u?

In place of mje350/340 how about C3503/A1381? Much better tr for VAS

MJL21193/94 can be use instead Toshiba-s, 1000uF/100V instead 470uF/100V is OK. No need to change MJE350/340, MJE-s are in cascode with BC550/560. BC550/560 are VAS transistors and MJE350/340 are only voltage translater.
Regards

 

[Arif Budiyanto]

I suggest set bias to 20-30mA per pair (600-900mV at 10R instead fuse). With 50mA per pair you have over 20W disipation per channel it's too high for your small heatsinks.
Regards

Many thanks for your advice, I will set more about 900mV in r10 instead fuse...
Best Regards,

 

[Junie]

Suggested before

corrected to3 version...

Is it possible to change the solder pads of Q7 and Q8 and make the same size of Q9 solder pads?

 

[nuwan]

I did not draw it

sir DAMANHURI
as sir APEX told cloud you post you're new PCB with 9 pair power trans PA
power amp details in 500W PA amplifier with Limiter, plz

thanks
nuwan

 

[DAMANHURI]

sir DAMANHURI
as sir APEX told cloud you post you're new PCB with 9 pair power trans PA
power amp details in 500W PA amplifier with Limiter, plz

thanks
nuwan

Please Chek
http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-462.html

This Page About Studio Reference Amplifier

 

[veljko]

Is it possible to change the solder pads of Q7 and Q8 and make the same size of Q9 solder pads?

You've been asking Alex the same quastion before... I can only give you the same answer... it is not enough place in that area, unfortunately.

 

[apexaudio]

SR200 with protect on pcb, not my work.

 

[44250]

.

SR200 with protect on pcb, not my work.

G R E A T ! ! !

 

[alex mm]

......nice but dual layer , could be done only in factory , not so easy for diy

 

[shravanth]

if I use +/-70vfor SR200 how watts at 4ohm I can get

 

[apexaudio]

......nice but dual layer , could be done only in factory , not so easy for diy

I'm sure you could done this on single layer
Regards

 

[apexaudio]

if I use +/-70vfor SR200 how watts at 4ohm I can get

Abot 300 watts at 4 ohm.

 

[AndrewT]

I can get over 300W into 4ohms (actually 35.3Vac into 4r0) from a 40+40Vac transformer that gave +-58.5Vdc at the PSU output.

Why only 300W when using a FET output stage and +-70Vdc for the supply?

 

[Vostro]

Why only 300W when using a FET output stage and +-70Vdc for the supply?

I thought SR200 used 2SC5200 BJT as output, not mosfets,
as you said many times bad SOA at 70V, so guess not much current available into 4R.

I'm sure you could done this on single layer
Regards

+1, Ive tried to do my own pcbs and I must say, I look at Mr Alex_MM pcbs for hints all the time, I've learned so much just from looking at his diy style boards.

Thanks Alex_MM.

and great contributions from Mr Apexaudio