Pictures and circuits of my DIY class D and other projects.

[djQUAN]

classd_fromru,

what process do you use for making your PCB's? are they presensitized boards already with green coating?

 

[classd_fromru]

djQUAN,
I producing my pcb with process using laser printer, but i don’t know how translate description of technology in to English, sorry. 🙁

RX5,
SMD components at us are easily accessible in locally shops trading radio components. 🙂

 

[djQUAN]

ah. I know that method. 🙂

your PCB quality is very good. 🙂

I guess you also use the same method as I in using a soldering iron to "tin" and coat the copper with a thin layer of solder?

 

[RX5]

djQUAN,
I producing my pcb with process using laser printer, but i don’t know how translate description of technology in to English, sorry. 🙁

RX5,
SMD components at us are easily accessible in locally shops trading radio components. 🙂

ah ic.. thats WHERE you get your parts... uhhmmm maybe just a limited value eh??

Even I , have a hard time getting 1/8 watt resistors... 🙂

 

[classd_fromru]

djQUAN, thanks 🙂
Am coat the copper with a thin layer of fusible alloy (Rose T=93-96°Ñ) in boiling water. I very like this technology 😎

RX5,
In Moscow there are no problems with SMD components. 🙂

 

[RX5]

djQUAN, thanks 🙂
Am coat the copper with a thin layer of fusible alloy (Rose T=93-96°Ñ) in boiling water. I very like this technology 😎

RX5,
In Moscow there are no problems with SMD components. 🙂

could you -LINK- me to that type of PCB technology? Im very curious as to HOW its done... 😉

 

[classd_fromru]

RX5,
I dont know english link on discription, trying asking other users here 😉 I think that many people here know about it...

 

[classd_fromru]

UcD v 2.5

Hi All!
I build new pre-final UcD version of my UcD 😎

An externally hosted image should be here but it was not working when we last tested it.

PCB, Circuit and other photos and oscillograms here:
http://www.classd.fromru.com/circuits.html

PS
Please dont ask me Gerber files, i dont have it. You can export LAY to Gerber with Sprint Layout 4 😉

 

[luka]

Pdf version

 

[edl]

Hi dear Classd_fromru,

How does your new design, the UCD 2.5 performs?
Have you done any measurements?
Bandwidth, noise, distortion...
Output power in RMS?

On the margin NICE WORK! Very nice!

Thanks a lot,
Merry Christmas

Regards,

 

[luka]

Merry Christmas to all.

I would like to build your amp, since I gain a lot of exp. in past month using SMD.

 

[classd_fromru]

Hi all! Merry Christmas 😀

edl
I shall do measurements of quality within the next few days. When there will be a free time.

luka and all

My latest version of 2-side pcb here:

 

[luka]

Thanks, great job you have done

Here is PCB in pdf, I hope it is everthing is OK...

 

[rogs]

Hi classd_fromru

Nice work! -- I notice you have not fitted any over voltage protection (OVP) -- do you not have any problems with busspumping if the output is short cicuit?

On my UcD (through hole, not SMD 🙁 ) the -ve rail climbs 'lower' very quickly with a short circuit output, and usually destroys the low side FET!

Even with OVP fitted, it is not always protected --do you not have any problems with this?

 

[Bearman]

RX5, The tinning procedure he is speaking of is called Tinnit. Do google search for Tinnit.

 

[luka]

o.0 Wow this is great stuff, tinning.
Read this, and be amazed, how easy it is. Would be nice to with it. It's so simple. Can't wait to get this opportunity.

 

[RX5]

Hi,

I use positive photeresist on my boards... single sided...

 

[luka]

Hi

Yea me too, but I don't like using UV, so this tinning sound like heaven 🙂. Using just standered bulb,... that would be life

 

[RX5]

I dont use UV either... just plain ordinary flourescent bulb.. though using UV would speed up things.... 5-8mins for fluoro // 60secs for UV....

anyways, it still gets the job done... 😉

 

[luka]

True. I would like to congratulate you and classd_fromru for outstanding work on D-amp. Hope to join you someday (soon🙂)