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Old 19th August 2013, 02:44 PM   #2611
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Hi Udailey, thx...
I use permanent marker & hand drawing
it is my old way but you can try it, it's fun & work very well on me.
well I hope I can explain what I do correctly:

First I print the layout in a paper, than make a sandwich (paper on top the board)
with a little hammer hitting the steel needle I made a mark on the copper side, so dot's (a little hole made by the needle) everywhere on the copper plane. The little hole help a lot to guide you to drawing on the blank copper plane (also when drilling the pads make more accurate). Then I start to draw pads, all pads, all traces,... that quite exiting

Double or triple the layer with permanent marker for best result (I even add refill ink on new marker, they dried fast)
Error drawing, don't worry fix with it :
Click the image to open in full size.
"the magic pencil"
http://imageshack.us/a/img850/549/tusukjarum.jpg

That why it is called PCB arts-work

ps: I'm sorry for this off topic

Regards
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Last edited by JOHN BALI; 19th August 2013 at 02:54 PM. Reason: it is a bit difficult to explain
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Old 19th August 2013, 03:50 PM   #2612
Salas is offline Salas  Greece
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Quote:
Originally Posted by JOHN BALI View Post
Hi, ...
this is my finished hand made PCB ... but it will be slowly build
Click the image to open in full size.
Vintage cool diy with curved vias. Great.
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Old 21st September 2013, 01:56 PM   #2613
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Default I guess it's ready to test

Quote:
Originally Posted by Salas View Post
Good luck then. What kind of amplifier you project it to drive? Does it have at least 26dB of gain so a buffer will bring enough sound pressure level?
Hi Sir Salas,
sorry for very late reply, ...the amp is 30dB & another one 40dB...

Today I almost done it, I want to test the voltage first before put the missing 2SK170 pairs
because I can't get 1.8 volt LED's so I use 1.88 volt instead.
I hope nothing bad happening

Regards
Attached Images
File Type: jpg IMG_0401.JPG (527.7 KB, 402 views)
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peace & G B U

Last edited by JOHN BALI; 21st September 2013 at 01:59 PM.
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Old 21st September 2013, 02:15 PM   #2614
Salas is offline Salas  Greece
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Looks it turned out good. Don't worry about that small Vf extra in the LEDs. Its how they produce them now.
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Old 22nd September 2013, 12:55 PM   #2615
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Default DCB1 is Ready to Rock

Hi all...
I measured the voltage today & they are okay I guess
so I put the 2SK170 pairs & they are a bit warm

Hey, they are working
maybe tomorrow I will surprise with the sound

Warm Regards
Attached Images
File Type: jpg DCB1 ready to rock.jpg (75.9 KB, 330 views)
File Type: jpg Pos Voltage.JPG (277.1 KB, 327 views)
File Type: jpg Neg Voltage.JPG (266.6 KB, 125 views)
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Last edited by JOHN BALI; 22nd September 2013 at 12:58 PM. Reason: missing pictures
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Old 22nd September 2013, 02:12 PM   #2616
Salas is offline Salas  Greece
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Fine until now. Verify that the relay clicks to engage the audio outputs. You should measure some DC offset at the audio outputs. If it is lower than 5mV it is acceptable.
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Old 25th September 2013, 03:54 PM   #2617
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Default All Ok, thanks to all

Quote:
Originally Posted by Salas View Post
Fine until now. Verify that the relay clicks to engage the audio outputs. You should measure some DC offset at the audio outputs. If it is lower than 5mV it is acceptable.
It all fine...
The relay clicks after few seconds, I just use BC550C for relay(no BC517 available here locally).
DC offset is below 5mV, the DC offset was about -1mV to -2mV.

Thank's for Salas for this wonderful circuit...
& Nelson Pass for the B1.

If anyone want to try it too I will give the layout
or should I post it here?

Regards
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Old 25th September 2013, 04:17 PM   #2618
Salas is offline Salas  Greece
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Congratulations. Did you put it in your audio system too?
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Old 25th September 2013, 07:05 PM   #2619
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by JOHN BALI View Post
It all fine...
The relay clicks after few seconds, I just use BC550C for relay(no BC517 available here locally).
DC offset is below 5mV, the DC offset was about -1mV to -2mV.

Thank's for Salas for this wonderful circuit...
& Nelson Pass for the B1.

If anyone want to try it too I will give the layout
or should I post it here?

Regards
Please post your layout
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Old 26th September 2013, 03:23 PM   #2620
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Default I like it :)

Quote:
Originally Posted by Salas View Post
Congratulations. Did you put it in your audio system too?
Yes, I did it ...

When I use the amp with a bigger gain, the difference is not so much
(maybe amp was not built properly by me )
Then I use the PeeCeeBee ...
Now I could feel my work is more alive, what a surprise ...
If I said the amp is only 50W then they (some people here, nearby) will say I was lying because the sound is so loud.
Better bass, mid, & high,
when I use tone control in the amp,
I turn to max position(not the volume) & no "over control" like before.
The DCB1 make it straight like what it is should be
I like it so much, maybe I should make it again some day

Please note that I'm use cheap source that built in volume & remote control so I don't use 20k pot (but I already order it).
So next time I must use better setup & get ready for another better story

Quote:
Originally Posted by RCruz View Post
Please post your layout
Hi, RCruz only if you want to build it fast

Ok, I will post it tommorow cos the PC I use is being repaired
there will be bottom & top component placement, jpg & pdf
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