Re-build Babo Zen (Papa's Zen5 w. jfet inputs)

Babowana · 29th April 2007, 07:18 AM

I'm re-building Babo Zen,
into one block stereo.
This time with my diy PCB ^^~

Here is the first shot of PSU PCB.

Zen Mod · 29th April 2007, 07:23 AM

ya nutz!

Babowana · 29th April 2007, 08:37 AM

Almost, yes!

After etching, I applied lead-free solder all over the
copper tracks. As an unquality effect, the board
slightly bent due to the process of cooling-after-heating
(shrinking stress).

Babowana · 29th April 2007, 11:30 AM

Okay, here is the second shot of bottom view
where all components are soldered on.

Babowana · 29th April 2007, 11:48 AM

Here is the 3rd shot of top view.

C-L-C is changed to C-R-C.
Each C is of 22,000uF/35V.
Each R is of 0R5.

The last Cs are of 33,000uF/35V,
where the rail voltages are supplied.

The wake-up call caps are of 4,700uF below
the zenner-current-controling R of 680ohm.
The series zenners are of 9.1V+9.1V+4.3V.

Hmm. . . lack of time. . . Will continue after
10-day home leave. . .

Zen Mod · 29th April 2007, 01:28 PM

Quote:

Originally posted by Babowana
Here is the 3rd shot of top view.

C-L-C is changed to C-R-C.
Each C is of 22,000uF/35V.
Each R is of 0R5.

The last Cs are of 33,000uF/35V,
where the rail voltages are supplied.

The wake-up call caps are of 4,700uF below
the zenner-current-controling R of 680ohm.
The series zenners are of 9.1V+9.1V+4.3V.

Hmm. . . lack of time. . . Will continue after
10-day home leave. . .

I wish you nice trip

let

be with ya!

Babowana · 29th April 2007, 02:35 PM

Quote:

Originally posted by Zen Mod

I wish you nice trip

Thanks, Zen Mood

Will be in

mood.

See Ya!

jupiterjune · 30th April 2007, 12:04 AM

Nice PCB's!

Any changes planned for the jfet inputs?

JJ

Babowana · 30th April 2007, 05:32 AM

Quote:

Originally posted by jupiterjune

Any changes planned for the jfet inputs?

JJ

No planning yet.
Partly because all measurements look fine,
and mainly because the sound is superb.

jupiterjune · 1st May 2007, 01:21 AM

Trust your ears! If it sounds good, that is all that matters!

JJ

29th April 2007, 07:23 AM	#2
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	ya nutz! __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

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29th April 2007, 08:37 AM	#3
Babowana Formerly "jh6you". R.I.P. Join Date: Jul 2006	Almost, yes! After etching, I applied lead-free solder all over the copper tracks. As an unquality effect, the board slightly bent due to the process of cooling-after-heating (shrinking stress).

30th April 2007, 12:04 AM	#8
jupiterjune diyAudio Member Join Date: Nov 2006	Nice PCB's! Any changes planned for the jfet inputs? JJ

1st May 2007, 01:21 AM	#10
jupiterjune diyAudio Member Join Date: Nov 2006	Trust your ears! If it sounds good, that is all that matters! JJ

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