Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #980 on: January 26, 2011, 03:10:12 PM »
Hi Guys,
Anyone can explain me how to wiring the audio trafo between the bypass pcb and main pcb ??
please let me know
Thank you
Fabio


ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #981 on: January 26, 2011, 07:50:49 PM »
I doubt this mod will do any change to any timing, not in the LA4, not in the D-AOC, but what do I know.
compare it to the LA2 schematic, one part of this resistor is switchable - how is it labeled?



sorry [silent:arts]
I did not understand what did you tell me ...
What is the resistor switchable in LA2A?
R7?
Thanks
« Last Edit: January 26, 2011, 09:21:43 PM by ilfungo »

Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #982 on: February 01, 2011, 03:32:53 PM »
Finally i finishing my D-AOC !!
posting some picture , the only problem is the gain reduction metering when the unit is set on link mode.
one channel seems to compress more than the other one
if someone solving this problem please let me know
Many thanks to Silent Art ,Kubi and all the people of this fantastic forum !!
Thank you all
Fabio

Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #983 on: February 01, 2011, 03:34:42 PM »
second picture

Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #984 on: February 01, 2011, 03:35:47 PM »
third picture

envelope

Re: D-AOC PCBs - the building and help Thread
« Reply #985 on: February 08, 2011, 05:19:33 PM »
Here is a general and minor inquiry posed to the few members who have reported heat stress on the 2W 470R

Were you using Metal-Film resistors or Metal-Oxide resistors in those locations?

They should be Metal-Oxide.

Also, I have noticed, while checking over the PCB, that the  PSU heatsink mounting pads area all tied to the ground plane. This is not the case with any of the other boards I have used with these PCB mounted heatsinks. Can this effect the audio signal ground?, act as antennae?, transfer heat to other nearby components?, etc?

EDIT: thank you for the heatsink reply below volker..... from DIGIkey, I have these TO-220 kits, and also using thermal paste, I should be good to go....http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=keystone+TO-220&stock=1
« Last Edit: February 12, 2011, 05:08:07 PM by envelope »

[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #986 on: February 09, 2011, 01:55:24 AM »
I used Metal-Oxide with no heat problems

Jonkan

Re: D-AOC PCBs - the building and help Thread
« Reply #987 on: February 09, 2011, 06:38:45 AM »
darn it, i think i might have film...

/J

[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #988 on: February 11, 2011, 03:59:10 AM »
Fabio,

the color scheme in your 2nd picture is wrong:



shouldn't it be instead of ;D ;D ;D


[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #989 on: February 11, 2011, 04:47:58 AM »
... Also, I have noticed, while checking over the PCB, that the  PSU heatsink mounting pads area all tied to the ground plane. This is not the case with any of the other boards I have used with these PCB mounted heatsinks. Can this effect the audio signal ground?, act as antennae?, transfer heat to other nearby components?, etc?

oh, you modified your posting, missed the last question.
the heatsinks connected to GND won't affect the audio signal, won't act as an antenna, won't transfer heat to other components.
BUT it forces you to finally insulate your regulators properly ;D ;D ;D
(not often seen here in DIY land)
it is an educational thing :o
« Last Edit: February 11, 2011, 04:52:30 AM by [silent:arts] »


Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #990 on: February 11, 2011, 07:02:27 PM »
Hi Wolker !!
Thank you for the banner !!
you are right i make a mistake with colors  ;D ;D ;D ;D ;D ;D ;D ;D
Like berlusconi with escorts ......  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D


Fabio,

the color scheme in your 2nd picture is wrong:



shouldn't it be instead of ;D ;D ;D



ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #991 on: February 23, 2011, 10:19:27 AM »
I just have to remove the transformer for unbalanced input?
thanks

j.frad

Re: D-AOC PCBs - the building and help Thread
« Reply #992 on: February 23, 2011, 10:22:18 AM »
yep!

ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #993 on: February 23, 2011, 07:47:16 PM »
thanks  j.frad

Blue Jinn

Re: D-AOC PCBs - the building and help Thread
« Reply #994 on: February 24, 2011, 07:56:03 PM »
not my thing. I am here just to unbalance the equation --pucho812

 http://www.bluejinn.org

ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #995 on: February 25, 2011, 04:48:39 AM »
Hello everyone
 now I understand how DAOC  sounds really  .....
 I removed the transformers in and out and I discovered that my problems came from them ....
Can you advise me what can I use for the electronic balance?
Thanks

Audioman

Re: D-AOC PCBs - the building and help Thread
« Reply #996 on: February 25, 2011, 04:41:17 PM »
For mine i used sowter

INPUT SOWTER 8540
OUTPUT SOWTER 1010

they cost a lot ..... but it sounds good !!




ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #997 on: March 11, 2011, 05:56:41 AM »
sorry
which model Carnhill Transformer can be used as output?
Thanks

syn

Re: D-AOC PCBs - the building and help Thread
« Reply #998 on: March 11, 2011, 11:16:32 AM »
VTB2291

ilfungo

Re: D-AOC PCBs - the building and help Thread
« Reply #999 on: March 11, 2011, 08:17:14 PM »
thanks syn

Have you tried?
someone has tried them?
Lundhal as input
Carnhill output?
Thanks


 

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