2stageEF high performance class AB power amp / 200W8R / 400W4R

[astx]

SA2015 - 4 channel VMOS

• 2nd channel mounted
• tested
• QC OK

Have fun,
Toni

 

[thimios]

• 2nd channel mounted
• tested
• QC OK

Have fun,
Toni

Hi Toni,what are fet that used here,240/9240 or these expensive and difficult to find IXTH80N20L fets?

 

[astx]

The used MOSFETs are IXTH80N20L and IXTH48P20P. A single IRFP240/9240 pair wouldn't survive rail voltages +/-50V with such power levels (200W@4R continuous) ...

In principle you can use the pcb also for IRFP240/9240 devices but at a much lower output power /lower rail voltages ...
The compensation may need a redesign.
The SOA protection always need to be redesigned. When I find time I can assemble a pcb using IRFP240/9240 only.

BR, Toni

 

[thimios]

OkToni,this will be useful.
Take your time!
Thimios.

 

[pued]

Hi Toni.
I would like you to design a printed version of the transistor 12 pairs.
I want to get more power and durability.
It will start as you detail it.

Thank you.
winate

 

[astx]

... using 12 pairs of MOSFETS IRFP240/9240 or 12 pairs of TTC5200/TTA1943?

BR, Toni

 

[astx]

SA2015 4 channel VMOS

... bias is stable (+/- 5%) from cold to hot....

Have fun, Toni

 

[pued]

using 12 pairs of MOSFETS IRFP240/9240

Thank you.

 

[astx]

SA2018 ultra fidelity monster amp

SA2018 - something like this?

Simulation results: 420W@8R (+/- 90V rails, 100mA bias per pair, 1.2A bias total, slew rate 100V/us)

Have fun, Toni

 

[pued]

wow.It's great to have that.
I use a large room.
How much distortion
excellent

Thank you.

 

[astx]

SA2015 4 channel VMOS

^^^ You meant "wow. it's great to have that"?


... all 4 power amp modules tested (working all out of the box) and mounted on heatsinks.

Next steps:

1. soldering housekeeping circuits
2. cabling

Have fun!
Toni

 

[thimios]

Touching the perfection!!!
Waiting for the cabling,i want to see how you manage all the cables.

 

[pued]

hi.
Print more?
I waited to build a circuit.

 

[astx]

SA2018 - 12 pair MOSFET monster will need more research (e.g.: SOA checks; many more hours of simulation and tests). Currently I have a limited amount of spare time so you need to wait a few weeks ...

Stay tuned. I definitely will build a prototype if I find time.

BR, Toni

 

[SGK]

2571 is a work of art!

(Something wrong with first image in 2561? Thumbnail ok but I get garbage when I click on it.)

 

[SGK]

Where is the MCU? To be fitted on wall opposite main toroid?

 

[astx]

2571 is a work of art!

(Something wrong with first image in 2561? Thumbnail ok but I get garbage when I click on it.)

Thx!

Picture view: No problem here ...

Where is the MCU? To be fitted on wall opposite main toroid?

See attached pictures ...

Have fun,

Toni

 

[AndrewT]

all three pic attachments in post2561 open and close as normal.

 

[SGK]

Ah you didn't try the SMD version...

Strange, I still have a problem with that first image. Maybe my browser has cached a corrupted version or something. Not a big deal.

 

[astx]

It is the (partially) SMD version...