1000W Simple PA Amplifier

[apexaudio]

Ok finalizing it now....

There is two more pcbs to done for this amp

 

[wiljj78]

There is two more pcbs to done for this amp

Yeeep that will surely follow soon....

Do you have the datasheet of the recommended 40A relay for protect?

Regards,

 

[apexaudio]

Yeeep that will surely follow soon....

Do you have the datasheet of the recommended 40A relay for protect?

Regards,

Relay from your post #41 will be OK.
Regards

 

[wiljj78]

Relay from your post #41 will be OK.
Regards

Ok thats good coz i have the macros ready of that relay and if you have even just a sketch for the component layout you preferred that will be much helpful for me to draw faster .

regards,

 

[apexaudio]

Ok thats good coz i have the macros ready of that relay and if you have even just a sketch for the component layout you preferred that will be much helpful for me to draw faster .

regards,

Ok , I give you sugestion tomorow.
Regards

 

[wiljj78]

Here they are....

 

[apexaudio]

Here they are....

Thanks again.
Regards

 

[Ricdelros]

Here they are....

Can you shift the 2sa5200/1943 a little closer to MJL so that all big trannies have equal distance?

 

[apexaudio]

Heatsink for BA1200 can be recycled from crest

 

[wattaniya]

hi apex, thank u for the such a high power class ab amp for diy.
hi willjj78 well done for the pcb design, good job.

can u share the top layer of this in pdf.
which software u use to design this pcb?

 

[nano nano]

thank you all rekan2 apex and here I also want to try the apex BA 1200 need how many amps it transformers?

 

[wiljj78]

Can you shift the 2sa5200/1943 a little closer to MJL so that all big trannies have equal distance?

Ok there you go....

 

[wiljj78]

hi apex, thank u for the such a high power class ab amp for diy.
hi willjj78 well done for the pcb design, good job.

can u share the top layer of this in pdf.
which software u use to design this pcb?

Thanks Nazir...I'm using Sprint Layout 5, here's the file.

 

[wendipassundan]

thank

Thanks Nazir...I'm using Sprint Layout 5, here's the file.

thank you very much, very cool design

 

[wattaniya]

thank u willjj78 for the files.
i know pcb designing is very hard work, welldone.

 

[AndrewT]

Apex, post181.
The relay driver should be saturated to operate properly as a switch.
It is normal to use a sat hFE of around 10 for this duty.
I would aim for a base current coming from the EF of around 4mA, for a 40mA relay coil.
The 10k in the collector of the EF is far too high.

 

[apexaudio]

thank you all rekan2 apex and here I also want to try the apex BA 1200 need how many amps it transformers?

Use 2x75vac/10A transformer.

 

[apexaudio]

Apex, post181.
The relay driver should be saturated to operate properly as a switch.
It is normal to use a sat hFE of around 10 for this duty.
I would aim for a base current coming from the EF of around 4mA, for a 40mA relay coil.
The 10k in the collector of the EF is far too high.

Thanks, it's my mistake resistor is 1k not 10k.
Regards

 

[tinitus]

does any of you have experience with connecting two trafos in series ?
thought I could use one trafo for each rail ?

they are older IE core trafos with 3x 33V
supply caps would be 100V types

 

[wiljj78]

does any of you have experience with connecting two trafos in series ?
thought I could use one trafo for each rail ?

they are older IE core trafos with 3x 33V
supply caps would be 100V types

That's possible... I even did it with 6 toroids in series with 29vac each..

See photo 4 of them in series...