Dx Juan layouts ideas PCB

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#61
vargasmongo3435 said:
wow! Willy you gave me goose bumps nice man I was practicing today with a Classic one Dx Blame ST

I never get tired of Carlos designs 🙂 here is a image I just stared today

I notice your skills are more nicer I like that bro :cheers: let get some cold soda pops jejejejeje
hold on ????? that the B500 from mister Apex ? 😕 wow


Regards
Juan
Click to expand...

Thanks bro...I just practicing the MKIII in different layout with protect onboard and will try to etch this one... if this design is good then later will try to add step driver and convert to class H hehehe...😀 just for fun...
 

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#62
AndrewT said:
You have kept the +ve, -ve and Power Ground supplies close coupled, good.
You have rail to output diodes, good.
See if you can find space for rail to ground diodes. These should also be after the fuses.

Can you find room to fit HF decoupling (x7r, 100nF to 220nF) to each output device?
Maybe add a few MF decoupling per two pair of output devices.

Move your NFB tapping to the ACTUAL output trace. Even if you have to use a link to reach over that U shaped emitter resistor rail.
Click to expand...

Thanks Drew appreciate your inputs....
 
#63
The vu meter will flash like crazy add .47 on the input and ground and also an fast diode, if theres no diode and capacitor it will flash the damn leds.
With cap+diode it will be smooth.
It also needs pretty high input voltage swing, add opamp cheap crap like 358 or 4885
 
#72
richie00boy said:
The rail to output diodes are needed as the output stage employs current limiting, but why would rail to ground diodes be needed?
Click to expand...
Two reasons that I know about.
1.) if you connect the PSU incorrectly or have miswired the PSU, the diodes turn on the light bulb in the tester or blow the mains fuse, if you have it close rated.

2.) if one supply rail fails, the diode on that rail prevents excessive reverse voltage on that rail until the other rail shuts down or you shut off the amplifier. That limit on reverse voltage prevents damage to electrolytic capacitors and semiconductors. And that is why I said
These should also be after the fuses.
Click to expand...
 
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#73
wiljj78 said:
Dear Juan,

Can you post how to import images in jpg file in details the way how you created your scorpion and other logo.

Thanks in advance...
Click to expand...

here are some example videos I did it quick 😀 the only thing you got yo do is take the image and change the format to BMP bimap then use "scanned copy

logos 1 - YouTube


logos 2 - YouTube


Regards
Juan
 

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#80
multi-pitch macros

So many parts , a massive macro database.

Some devices , such as standard metal film .25-.50W - standard macro.
Caps - 3.5,5,7.5mm ... standard.
Same with semiconductors - JEDEC standard.

Relays and other proprietary components - some reuse E-waste relays ,
or use "buyouts"/surplus.
I do this for big capacitors ... some here buy Apex JR's caps, some buy
panasonics or Nichicon's from Mouser.
My PS "big cap" macro (10/22mm) fits em' all.
Custom "Sanken" to-264 macro??? DIY'ers use anything they have available.
I do admit , they look really good. Commercial products -YES ,DIY... overkill.

Also , old diy'ers (me too 😀) need bold screen-prints/large pads to even see
the work.

OS
 
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