racked console channels help (audix 35102)

Recording Techniques, People Skills, Gear, Recording Spaces, Computers, and DIY

Moderators: drumsound, tomb

User avatar
I'm Painting Again
zen recordist
Posts: 7051
Joined: Wed May 07, 2003 2:15 am
Location: New York, New York
Contact:

Post by I'm Painting Again » Wed Mar 22, 2017 5:38 pm

another thing I noticed is that the ground pins on the XLRs do touch chassis ground they're they type with the little tab you solder to the jack housing

User avatar
floid
buyin' a studio
Posts: 928
Joined: Tue Jan 03, 2006 1:39 pm
Location: in exile

Post by floid » Wed Mar 22, 2017 5:43 pm

It's not that the extra stage alters the response, but that the output of this stage may not like seeing that transformer's inductive load. It forms an LCR filter, the heart of many a passive eq.
Village Idiot.

User avatar
I'm Painting Again
zen recordist
Posts: 7051
Joined: Wed May 07, 2003 2:15 am
Location: New York, New York
Contact:

Post by I'm Painting Again » Wed Mar 22, 2017 5:55 pm

sort of makes sense .. I'm trying to keep up / understand what yr saying


For reference

it's the version 03 35102 - written in pen on the back of the modules frame - I see one NE5 something IC on the D253 card

my cards say

D253 issue B AND issue F printed on the board with the mic and line xfrmrs .. like huh?

and

D258 issue D on the card with the wasp switches

User avatar
floid
buyin' a studio
Posts: 928
Joined: Tue Jan 03, 2006 1:39 pm
Location: in exile

Post by floid » Wed Mar 22, 2017 6:09 pm

Here is the schematic i'm referencing
https://groupdiy.com/index.php?topic=28892.0
There are 2 pages. The first is more of a block diagram. In the very upper RH is a representation of amp five, the output, with pin numbers that correspond to the numbers on your transformer schematic.
On the second page is an actual schematic of amp five, in the middle on the left, which shows the caps and resistors I referenced.
The first thing I would try is desoldering the transformer and making temporary connections at those points to an output jack. If the frequency response is no longer skewed, this is the culprit.
Village Idiot.

User avatar
I'm Painting Again
zen recordist
Posts: 7051
Joined: Wed May 07, 2003 2:15 am
Location: New York, New York
Contact:

Post by I'm Painting Again » Wed Mar 22, 2017 6:21 pm

I will try as that sounds DIY able

BTW thanks so much for taking the time to help.

I would think that the pro audio company that racked these would not have sent them out not representing 1/2 the spectrum .. but I guess it's possible

I sent an email to someone who's company (or old company) did the racking about the issue and I'm waiting to see if they weigh in

it's the schem for the v02 that's posted there and I have v03 ..not sure how different it is

User avatar
I'm Painting Again
zen recordist
Posts: 7051
Joined: Wed May 07, 2003 2:15 am
Location: New York, New York
Contact:

Post by I'm Painting Again » Wed Mar 22, 2017 6:47 pm

ok so i desoldered the three wires from the transformer and connected them directly to the input of the analyzer - and same skewed response

cassio2263
audio school
Posts: 2
Joined: Wed Apr 15, 2020 4:42 pm

Re: racked console channels help (audix 35102)

Post by cassio2263 » Sat Nov 28, 2020 10:08 am

Hi.
I live in Brazil.
I recently did a complete recap on the Audix 35104.
when I installed it on a rack, there were some problems similar to yours.
There was one that the preamp is working normal, but when I turn on the EQ the sound is distorted.
I am not an expert. I'm trying to solve it with a local technician.
Apparently he left the soldering tips of the cacapcitors, so that may have touched the plate.
Or something was the replacement of the 470uf25v capacitor with 470uf40v (with a 5mm larger diameter) on the D259 output driver board. I think it's housed in the chassis.
So, my question, were you able to solve your Audix 35102 problem? If you can share how you did it, I appreciate it.

as i said, i am not an expert, but it seems that the difference from Audix 35104 to 35102 is the output drive - D259.
Greetings from Brazil - Bahia.
Attachments
35104 output stage-1.JPG
35104 output stage-1.JPG (132.15 KiB) Viewed 188 times

cassio2263
audio school
Posts: 2
Joined: Wed Apr 15, 2020 4:42 pm

Re: racked console channels help (audix 35102)

Post by cassio2263 » Sat Nov 28, 2020 10:13 am

another question:
Do you have the complete service manual for the Audix 35101, 35102 and 35104?

User avatar
I'm Painting Again
zen recordist
Posts: 7051
Joined: Wed May 07, 2003 2:15 am
Location: New York, New York
Contact:

Re: racked console channels help (audix 35102)

Post by I'm Painting Again » Mon Dec 07, 2020 5:49 pm

I sent you a direct message

Post Reply

Who is online

Users browsing this forum: No registered users and 41 guests