Combined Onaudio thread. (23 threads)

[OnAudio]

Cheers Joel

Nice job, just a few suggestions.....

 

[OnAudio]

You could increase the distance between the power and input a little more. You could also add another cap.

 

[drowranger]

I should have uploaded it today...

Hi Harrison,

I forgot the additional decoupling capacitor and previous layout missing c4 and two diode for protection.tomorrow I will post it

regards,
joel

 

[drowranger]

latest pcb for ksa992 and mpsa92

Hi Harrison,

Previous layout of ksa 992 pin configuration is wrong it should be ecb however mpsa92 can be used.I also forgot to include c4 and the 2 protection diode.In this latest layout I have produced two boards for ksa992 and mpsa92 and also included your suggestion.I have included also my schematic as reference.

regards,
joel

p.s.

pls. check my work.

 

[drowranger]

about diode d12 and d1...

forgot to change the value. it should be MURS120.

regards,
joel

 

[OnAudio]

Thank you Drow.

Paul, shes all yours.

 

[PauloPT]

She's all mine!😉

Soon I will post pictures! 😉

 

[PauloPT]

To be sure, the part I have to print for tonner transfer is NOT the mirror one, righ?

 

[drowranger]

right.

Hi Paul,

Just after removing those unwanted copper check with VOM those pads and tracks which are close to each other.This is my procedure before populating it with parts.Goodluck and enjoy DIY'ng😉.

regards,
joel

 

[OnAudio]

Make R29 1watt
Make R34 2Watt

................processing make

 

[PauloPT]

Thanks, Joel! 🙂

Harrison, I'll compile your subroutine into the pcb 😉

I etched the board.

 

[OnAudio]

nice progress

 

[drowranger]

that was fast!

Hi Paulo,

Use plastic spacer on both sides of pcb and copper spacer on star gnd connected to chassis.the smaller in length much better.

regards,
joel

 

[drowranger]

pcb for mpsa92

Hi Harrison,

This is my version of 4 pairs.If you have suggestion and want to modify pls. inform me.

regards,
joel

p.s.

pls. open it in new tab..

 

[OnAudio]

Thanks Drow 🙂 ,you do have a passion for the art

 

[PauloPT]

Holes drilled

Hi,

I drilled the holes today. I'm still waiting for some resistors to arrive, I expect them by monday or tuesday in the mail. Meanwhile, I'll solder the other parts.

 

[PauloPT]

Progress

Hi guys,

Today I soldered some parts and I'm still waiting for some resistors wich I expect to arrive tomorrow.

I noticed in the schematic R10 and R11 are switched but ok in the layout.
The diodes D1 and D22 are labeled as 1N5333. This kind of diode is a zener but the voltage is not mensioned. Wich voltage zener should I use?

kind regards,
Paulo.

 

[astankov]

1N5333 is a 3.3V , 5W zener diode.

Regards!

 

[PauloPT]

Thank you, astankov! 🙂

But does a 3.3V zener makes sense where it is? Shouldn't be instead non-zener protection diodes?

 

[drowranger]

that is mur not zener

Thank you, astankov! 🙂

But does a 3.3V zener makes sense where it is? Shouldn't be instead non-zener protection diodes?

sori paulo I forgot to change the value.look in my past thread I have mentioned the value.Im using cellphone could not check schematic.