500W PA amplifier with Limiter

[gantex]

I think because B500 was born earlier than B600. B500 schematics was created a few years ago, and B600 schematics was created and shared by Mr. Mile just a few months ago. And we know there is some people in our country who gets the schematics of B600 from this forum won't share the layout for us here. I don't know why he/she won't share. I think because of that the fans of B600 is less than B500 in this forum.

Yes.. U rite. Thats what i think too.. Too minimum shared and review of b600. And yes.. New schematic work good. But i think some dc offset detection missing here. Very defferent with b500, hem.. Maybe any diyers can explain about dc offset of b600.

 

[gantex]

I think b600 without ic on input stage will be still work. So what for this ic? Dc servo? I think no. Except input balance on first ic, but second? What for? Negative out ? Then invert pass buffer to get positif out? Iam rite?

 

[apexaudio]

Quad Complementary Pair Transistor MPQ6700 can be use for B600 input stage.

 

[gantex]

Quad Complementary Pair Transistor MPQ6700 can be use for B600 input stage.

U mean complementary tr can replace with this ic?
I want ask to u mr.mile. where dc servo of b600? Iam not see it.

 

[apexaudio]

U mean complementary tr can replace with this ic?
I want ask to u mr.mile. where dc servo of b600? Iam not see it.

There isn't DC servo on B600

 

[gantex]

Thanks for ur replay mr.mile. i hope u are not boring if i am too much ask and want to know. So, can i applied dc servo from b500 for b600? Because i like this b500. But as u say, b600 more good bass respond and i like it too. Just need dc servo from b500 applied to b600. Any suggestion?

 

[gantex]

Well i think this b120. Just give some input balanced and give more final output. So this called b600. Iam rite?

 

[TeHaa]

Mr. Mile i need your suggestion about the power supply for B600. Or onyone can help me give a suggestion. How much minimum Ampere of transformator needed for B600?

 

[apexaudio]

Mr. Mile i need your suggestion about the power supply for B600. Or onyone can help me give a suggestion. How much minimum Ampere of transformator needed for B600?

Use 2x60vac/5A for mono or 2x60vac/10A for stereo.

 

[gantex]

Now with MPQ6700 look like ca18. Are u want built b600 same or like crest mr.mile?

 

[TeHaa]

Use 2x60vac/5A for mono or 2x60vac/10A for stereo.

Thanks for your answer

 

[vdij]

Mr. Mile, what is it? Sorry for the off-topic.

 

[44250]

Mr. Mile, what is it? Sorry for the off-topic.

you have a personal message,my friend...

 

[vdij]

thank you 44250

 

[gantex]

any suggestion is very apreciated..

i have build b500 and dont ask about sound, sounds good, much better i never hear with almost power amplifier i ever build. but one thing make me so not confortable that i have dc offset so defferent with another channel. fisrt ch i have 0 offset, its good for me and offcourse make me so happy. because hard to get this offset. and second ch i get negatif dc offset. but not to big just a little, almost cannot read with my analog multitester. but this make me not confortable. what cause this? dc servo or another component? or change the ic can fix this?

 

[gantex]

any suggestion is very apreciated..

i have build b500 and dont ask about sound, sounds good, much better i never hear with almost power amplifier i ever build. but one thing make me so not confortable that i have dc offset so defferent with another channel. fisrt ch i have 0 offset, its good for me and offcourse make me so happy. because hard to get this offset. and second ch i get negatif dc offset. but not to big just a little, almost cannot read with my analog multitester. but this make me not confortable. what cause this? dc servo or another component? or change the ic can fix this?

thank for all diyers for help if any..
i fix my problem.. and now i get 0 v of dc offset. thank.

 

[gantex]

just share something to always use ic socket if any goes wrong so no need break your soldering because not all ic is good.

hey mr.mile just for meansure how much degrees if this amp working for min n max operation. just to check if im not set bias to big.

 

[gantex]

just share something to always use ic socket if any goes wrong so no need break your soldering because not all ic is good.

hey mr.mile just for meansure how much degrees if this amp working for min n max operation. just to check if im not set bias to big.

Ok.. I Know my answer. So thank to all.

 

[lawbadman]

Can I use the MJL4281A and MJL4302A as output transistors instead?

 

[luanttps02475]

the most imortant things is PCB