Dual La2a - [silent:arts] version

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Postby [silent:arts] » Sun Apr 05, 2009 8:58 am

for grounding:

Image

you have a rev01 PCB, right ?
just a guess, could this be some sort of oscillation ?
you could try to add those grid stoppers (GSX01 & GSX02 in the rev02 schematic)
volker
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Postby Infernal_Death » Thu Apr 09, 2009 6:58 am

Grounding looks good. Yes i have a Rev01 board. Will try those grid stoppers. I guess if they don't help they also won't hurt ?

Flo
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Postby [silent:arts] » Thu Apr 09, 2009 9:03 am

no, they won't hurt
volker
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Postby stereokillah » Sun May 03, 2009 9:59 pm

Hello every body a litllte back.
First congratulations for all the beautiful DLa2A unit finsih

second i try ask less helpful if it's possible, i read and read each page page, but me and the english will be Three.

So, i would to know how to calculate theresistor TBd , cause now i have the T4B from Drip

And i serach to have one pdf off the pcb to drawing a wiring guide please, i don't find it .

Thank you
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Postby [silent:arts] » Sun May 03, 2009 10:10 pm

33K
volker
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Postby stereokillah » Sun May 03, 2009 10:13 pm

like the original, thank you Volker
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Postby stereokillah » Sun May 03, 2009 10:29 pm

Rednoise have one pdf of the above the PCB.
I will try to drawing one wiring guide with all information here and logical.
and make it one line if nobody is against.
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Postby [silent:arts] » Mon May 04, 2009 12:35 pm

stereokillah wrote:Rednoise have one pdf of the above the PCB.
I will try to drawing one wiring guide with all information here and logical.
and make it one line if nobody is against.

cool :cool:
volker
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Postby stereokillah » Wed Jun 17, 2009 12:17 pm

I'm sorry i forgoten to do the rack of this topic.
My wiring is herehttp://www.prodigy-pro.com/diy/index.php?topic=32677.100

With the great help of [silent:arts]

thank you
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Postby Holger » Sun Jul 05, 2009 11:27 am

I'd like to share a bug here: I had no compression on the left channel, changed tubes, T4B, pots, trannies etc: no compression. After hours I found ot that I had a barely visible short at pin 6 of the T4B octal socket. Now everything works as expected, even the channel matching/stereo adjust works absolutely fine. I'm happy now :D .
Waiting for my front panel, expect a cool looking device in the next weeks.
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Postby Organisator » Sun Jul 05, 2009 2:09 pm

Holger wrote:After hours I found ot that I had a barely visible short at pin 6 of the T4B octal socket.


I don't see a short on my PCB. Maybe it's just a fault on your PCB and not on the whole batch. :idea:
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Postby Infernal_Death » Thu Aug 06, 2009 12:23 pm

Almost forgot but i actually finished mine some time ago. It was some stupid faults in the wiring of the link switch and the meter switches which caused the unit to behave quite funky (and i mean REALLY funky :lol: )
It was a classic PICNIC fault (in this case PICNIC = Problem in Chair, not in Compressor) :? :roll: :lol:

Anyway a big thank you to Volker for supplying once again a great project. I don't think it can be easier to get a dual LA2A than this.
Noise is pretty low, completely usable in every situation. I only hear it when no signal is present and then it's not so obvious. Gain of the unit is way too much so i think i will perform the gain mod somewhere down the road but i am happy that it's working now.

Flo
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Postby bernbrue » Thu Aug 06, 2009 1:57 pm

Hi Flo,
yes, an excellent compressor with a great pcb. We want pictures!!!!!!!!!!!!!
regards
Bernd
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Postby [silent:arts] » Thu Aug 06, 2009 3:56 pm

Flo, thanks for the kind words :D :D :D

yes, give us the pictures of the finished unit :notworthy:
volker
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Postby Infernal_Death » Sat Aug 08, 2009 1:57 pm

Sorry, no camera at hand right now. Try to remember it when i have one again.
From the outside it doesn't like any different than the pic i have already posted :D

Flo
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