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Techtalk • View topic - Dual La2a - [silent:arts] version

Dual La2a - [silent:arts] version

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Dual La2a - [silent:arts] version

Postby [silent:arts] » Sat Oct 27, 2007 4:09 pm









by SSLtech
by Kingston

by azone

FINISHED UNITS:






(Numero deux) :shock:







 (Numero deux)

(scroll down thru all those nice builds)





Last edited by [silent:arts] on Thu Mar 03, 2011 6:32 am, edited 22 times in total.
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Postby ChuckD » Thu Nov 01, 2007 5:57 pm

Last edited by ChuckD on Sat Jan 26, 2008 9:20 pm, edited 2 times in total.
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Postby ChuckD » Thu Nov 01, 2007 6:14 pm

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GROUNDs

Postby [silent:arts] » Fri Nov 02, 2007 11:17 am

there are a few differences between the Drip and the [silent:arts] LA2A.

first: GROUNDING
on the PCB there are 4 independend Grounds (each side of audio, PWR and the 5V for the true bypass relais)
at least you MUST connect the audio and power grounds to a star point, best is connected to the chassis and the IEC safety earth (that is the way I did it with NO problems). the 5V ground can be jumpered to the PWR ground on the PCB.

Image

the PCB layout for the GND connectors is for this:


since the molex 3way connectors for in and out are directly connected to the channel grounds just wire the XLRs Pin 1 there (no need for a direct "PIN1 to chassis" in this layout)
Last edited by [silent:arts] on Tue Jan 20, 2009 10:27 pm, edited 1 time in total.
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CAPs

Postby [silent:arts] » Sat Nov 03, 2007 8:45 am

the caps I used (and the PCB layout is made for):

ceramic:



silver mica:





poly:



(wrong picture there, spacing is 5mm)



electrolytics


Last edited by [silent:arts] on Sat Nov 03, 2007 8:01 pm, edited 1 time in total.
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Postby bernbrue » Sat Nov 03, 2007 6:12 pm

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Postby [silent:arts] » Sat Nov 03, 2007 6:48 pm


65V - or use a 65V zener diode
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Postby waldorfcave » Sat Nov 03, 2007 7:54 pm

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Postby bernbrue » Sat Nov 03, 2007 8:54 pm

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Postby [silent:arts] » Sun Nov 04, 2007 7:40 am

this link for the parts list will work better:
http://www.twin-x.com/groupdiy/albums/u ... nt_Art.xls :wink:
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Postby bernbrue » Sun Nov 04, 2007 9:45 pm

thx, Volker
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Postby Infernal_Death » Sat Nov 10, 2007 9:51 am

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Postby bernbrue » Sat Nov 10, 2007 10:15 am

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Postby [silent:arts] » Sat Nov 10, 2007 10:24 am

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Postby bernbrue » Sun Nov 11, 2007 4:37 pm

Hi,
just scored these transformers:

Image

two for the price of one new. :cool:
regards
Bernd
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