1000W Simple PA Amplifier

[apexaudio]

@astx can you share apexaudio1000W LTspice file?
Regards

 

[HighTec]

Oh no! Apex has opened the Pandora's box again. How many replies will this thread have? 2000-3000?

 

[astx]

@astx can you share apexaudio1000W LTspice file?
Regards

Here we are...

Note for all who copy this without reading thread: Do not use this schematic for production due to SOA violations!

BR, Toni

 

[Walkalone]

110V rail and 2SC5200?

Maybe, change they by MJL21193/MJL21195 will be better.

 

[apexaudio]

Here we are...

Note for all who copy this without reading thread: Do not use this schematic for production due to SOA violations!

BR, Toni

Thanks, I change schematic in post #44 is version with MJL4281A/MJL4302A
Regards

 

[apexaudio]

Oh no! Apex has opened the Pandora's box again. How many replies will this thread have? 2000-3000?

It is not my intention
Regards

 

[black]

wher is the sr 800 schematics?

 

[Walkalone]

Front-end is too simple. It's good choice for Hi-fi than PA.
Cascode IPS, current mirror Vas, EF3... all they'll be improvements.

 

[wiljj78]

That's the knowledge power of APEX AUDIO

 

[apexaudio]

Front-end is too simple. It's good choice for Hi-fi than PA.
Cascode IPS, current mirror Vas, EF3... all they'll be improvements.

That's will be SR800, BA1000 must be simple as possible

 

[tinitus]

wow, this is going fast

well, I have 8 pair of 'selected' 21193/94
for home use I see no reason to go higher than+/-60Vdc

 

[andrewlebon]

Another ab class @110 volt dc rails CA9

base resistances 33 ohms why such a high value
warm regards
andrew lebon

 

[TonyTecson]

That's will be SR800, BA1000 must be simple as possible

Apex, will you publish the psu circuit soon? also with 110volt dc rails, do you plan to stack filter caps? or use 160volt rated caps, since 120volt rated caps are not easily available?

 

[apexaudio]

Apex, will you publish the psu circuit soon? also with 110volt dc rails, do you plan to stack filter caps? or use 160volt rated caps, since 120volt rated caps are not easily available?

Use 160volt rated caps if available or this circuit with 63volt rated caps.

 

[tinitus]

Use 160volt rated caps if available or this circuit with 63volt rated caps.

would it be ok to combine both, finishing with high voltage caps
I have not found any with more than about 2000uf

 

[apexaudio]

would it be ok to combine both, finishing with high voltage caps
I have not found any with more than about 2000uf

You can use 12X 2000uF/160V only in parallel 6+6

 

[tinitus]

Jean Hiraga coupled big caps with opposite polarity
should work like bipolar cap
with the lower voltage caps, very high capacitance was possible
but capacitance would be half
there was also a single big cap with the correct voltage in paralel, but with lower capacitance

 

[TonyTecson]

i found 120v caps here... Radial Capacitors

35,000 Mfd /120V /3" diameter and 5 5/8 Cornell-Dubilier/ $29.95

at the streets of Raon in Manila, our small version of Akihabara, computer grade caps are sold at the sidewalks, they are pulls but are still in very good condition..

 

[HighTec]

Large can capacitors

 

[tinitus]

well, in that case...120V F&T

SI10212025050 1000uF 120V Cap Snap-in 25x50mm Can Appropriate for 1U Applications