500W PA amplifier with Limiter

[Gassanov]

and this is from apex audio

How many watt you get using this method "TEF" ?

Salam kenal

 

[ahmadfay]

How many watt you get using this method "TEF" ?

Salam kenal

I assemble with 8 pairs toshiba, using 15 A transformer with voltage 2 x 55 Vct. I used to drive speakers faboulus 2 x 18 "4 ohms, the result is very satisfactory, i like it
Greetings also

 

[vedmitraa]

55-0-55 A.C. that is around 77-0-77 Volt D.C. if I am correct not 90-0-90 as in layout, Did you have to put a delay start in it, how was the heat of outputs on load,Is there any more changes in component value in your layout.thanks in advance for getting the reply.

 

[wendipassundan]

correction layouts

I will make a B500 with a length of 30cm, please in this layout correction if there is a mistake,,,, sorry my bad english. Thank you so much.

 

[Gassanov]

How many watt you get using this method "TEF" ?

Salam kenal

Cool. Thx 4 the info bro

 

[Gassanov]

I will make a B500 with a length of 30cm, please in this layout correction if there is a mistake,,,, sorry my bad english. Thank you so much.

Bikin yg pake sanken kang, 8 batang sekalian

 

[vedmitraa]

MR.Wendipassundan , This one is not tripple ef as of Ahmadfay

 

[wendipassundan]

MR.Wendipassundan , This one is not tripple ef as of Ahmadfay

No sir MR Vedmitraa, B500 is the only standard length are changed, I happened to have a heatsink 30cm. There is nothing wrong with the layout sir??

thk

 

[wendipassundan]

psu

No sir MR Vedmitraa, B500 is the only standard length are changed, I happened to have a heatsink 30cm. There is nothing wrong with the layout sir??

thk

 

[wendipassundan]

layout protect

please correct protector for layout......



thk.

 

[ahmadfay]

55-0-55 A.C. that is around 77-0-77 Volt D.C. if I am correct not 90-0-90 as in layout, Did you have to put a delay start in it, how was the heat of outputs on load,Is there any more changes in component value in your layout.thanks in advance for getting the reply.

77-0-77 VDC absolutely right. scheme while no corresponding change in the scheme Mr. Mile, the final transistor is not too hot, just hot on the driver, but after being given the fan its ok. I wear a speaker protector existing B500 standard fan speed control,
regards

 

[apexaudio]

LDR + LED instead NSL32

 

[ahmadfay]

Mr Mile,
what value of LDR, and what is the colour of LED
warm regads,
Ahmadfay

 

[wendipassundan]

80x75mm

Sir,do you have Protec layout in PDF??

 

[boss2009]

For checking

Layout H 900 TEF and B 500 TEF

Hello Everyone... Hope it's ok to post it here since this is just a reply to the post above. I manage to merge the parts & PCB layout hoping anyone can checked if its correct. There are some parts which values are not available... hoping also anyone can give suggestion. Anyone else have tried this layout aside from Mr. Liem Poo?

many thanks in advance

 

[boss2009]

BTW .... this is my on going H900. Waiting for opportunity to complete.

Regards to ALL

 

[jaagut]

i'm excited to make my own b500 too. here's my initial pcb. my experience tells me that pcb etching is the most difficult part of the process!

 

[jaagut]

additional pics. my board is a mirror image, so i have to solder the all trans and ic to the copperside.

got few questions. 470pF number code is 471, but electronic sales staff gave me 470. for 33pF number code is 330, but staff gave me 331. i'm doubtful if it is correct. is this correct?

 

[Nhor]

Hi sir Apex and to all DIY members, Im new in this thread and im interested to build this H500 by Sir apex which is the correct layout of pcb and what is the maximum rail voltage?
Thank you and Best Regards.
Nhor

 

[jaagut]

anybody who can confirm regarding capacitor codes to my previous post #2518? thanks in advance.