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Old 27th July 2008, 08:16 PM   #1531
Nordic is offline Nordic  South Africa
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If I may I ask... I don't see any decoupling caps in either the schematic or the photos of the amp...

Are they recommended for this topology... if so, is it a matter of bigger is better, or does there come a point where bigger just = smearing.
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Old 27th July 2008, 10:01 PM   #1532
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Zen Mod



juma - is this good enough ?

here shown without upper and lower gnd plane




my first pb , made with PC - ever !

Kicad proggie

seems that I forgot attachment
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Old 27th July 2008, 10:57 PM   #1533
juma is offline juma  Germany
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Quote:
Originally posted by Zen Mod


juma - is this good enough ?
here shown without upper and lower gnd plane

my first pb , made with PC - ever !
Kicad proggie
Quote:
Originally posted by Zen Mod

seems that I forgot attachment

Looks nice to me !
What is it ?
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Old 27th July 2008, 11:51 PM   #1534
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by juma




Looks nice to me !
What is it ?

borbely/juma F5 intended gain stage
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Old 28th July 2008, 05:20 AM   #1535
EUVL is offline EUVL  Europe
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> borbely/juma F5 intended gain stage

Wrong thread !

http://www.diyaudio.com/forums/attac...amp=1215343219




Patrick
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Old 28th July 2008, 05:33 AM   #1536
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by EUVL
>.......
Wrong thread !
.......



http://www.diyaudio.com/forums/showt...15#post1565315
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Old 28th July 2008, 01:38 PM   #1537
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Default Take Two!

Hi guy's,

I hope this one is better.


Best regards,


Audiofanatic
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Old 28th July 2008, 02:12 PM   #1538
udailey is offline udailey  United States
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I dont think your pcb makes the requirement of the two 10r meeting at ground. Maybe it does and I am missing it.
Your left 10r and 100k meet but not at ground as in the schematic. I think you might need a ground trace running on bottom layer from 10r to 10r.
If I am wrong please burn me at the stake.
Uriah
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Old 28th July 2008, 02:26 PM   #1539
Tea-Bag is offline Tea-Bag  United States
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Default f5 pcb

Quote:
Originally posted by udailey
I dont think your pcb makes the requirement of the two 10r meeting at ground. Maybe it does and I am missing it.
Your left 10r and 100k meet but not at ground as in the schematic. I think you might need a ground trace running on bottom layer from 10r to 10r.
If I am wrong please burn me at the stake.
Uriah

Maybe the top SP connections are supposed to be the Speaker -, not sure, looks like a star or cross here. Doesnt ground at 10ohm ends like the AX schematic however as UDaily sayz.

Looks like the green traces are bottom side. I do like the layout.
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Old 28th July 2008, 02:57 PM   #1540
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Default Better ?

Hi,


This is a close ground where the 10R's are grounded.

Thanks for the feedback.


Audiofanatic

P.S. The PCB is 6.6 cm X 3.6 cm. Red is bottom and green is top! (edit)
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