[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #1440 on: February 12, 2019, 03:16:02 PM »
Do i need to replace R126 & R226 with a trimmer in order to make the meters read zero dB?
At the moment they stay on the complete left side.
No. Meter switch wired correctly?


weiss

Re: D-AOC PCBs - the building and help Thread
« Reply #1441 on: February 12, 2019, 03:24:47 PM »
No. Meter switch wired correctly?

yes, + of GR on the pcb is connected to + on meter side.
btw. No audio passing when not in bypass mode  :'( :'( :'(


I think i got to check the lundahl wiring again as i wasn't sure about the connections in the first place..

I did it like this:

Primary: pins 2+4 tied, pin 1(+), pin 3(-) - From Bypass board XLR
Secondary: pins 5+7 tied, pin 8(+), pin 6+pin E(-) - To PCB

For the output I wanted to wire reversed 2:1

Primary: pins 8+5 tied as (+), pin E to ground - From PCB
Secondary: pins 2+4 tied, pin 1(+), pin 3(-) - To Bypass PCB

Potato Cakes

Re: D-AOC PCBs - the building and help Thread
« Reply #1442 on: February 12, 2019, 10:07:48 PM »
yes, + of GR on the pcb is connected to + on meter side.
btw. No audio passing when not in bypass mode  :'( :'( :'(


I think i got to check the lundahl wiring again as i wasn't sure about the connections in the first place..

I did it like this:

Primary: pins 2+4 tied, pin 1(+), pin 3(-) - From Bypass board XLR
Secondary: pins 5+7 tied, pin 8(+), pin 6+pin E(-) - To PCB

For the output I wanted to wire reversed 2:1

Primary: pins 8+5 tied as (+), pin E to ground - From PCB
Secondary: pins 2+4 tied, pin 1(+), pin 3(-) - To Bypass PCB

Are you using Volker's HWBP boards to do your bypass function? If so, there shouldn't be any signal going to the transformers when in bypass. It should just go from input to output XLR directly. The small boards by the connectors make it hard to see what is going on there.

Thanks!

Paul

[silent:arts]

Re: D-AOC PCBs - the building and help Thread
« Reply #1443 on: February 13, 2019, 12:13:29 AM »
Your Lundahls are wired wrong. The input may work but the output won't.

For 2:1
Primary: pins 2+4 tied, pin 1(+), pin 3(-)  (PCB)
Secondary: pins 5+8 tied(+), pin 8(+), pin 6+7 tied(-) (Bypass PCB)

Pin E is shield & case and should go to gnd (I would use the shield of the cable from / to the Bypass PCB).

weiss

Re: D-AOC PCBs - the building and help Thread
« Reply #1444 on: February 13, 2019, 01:58:28 AM »
Are you using Volker's HWBP boards to do your bypass function? If so, there shouldn't be any signal going to the transformers when in bypass. It should just go from input to output XLR directly. The small boards by the connectors make it hard to see what is going on there.

Thanks!

Paul

Hi Paul, thank you.
These are Volkers boards, they work fine. I get signal when in bypass so that’s okay.

Your Lundahls are wired wrong. The input may work but the output won't.

For 2:1
Primary: pins 2+4 tied, pin 1(+), pin 3(-)  (PCB)
Secondary: pins 5+8 tied(+), pin 8(+), pin 6+7 tied(-) (Bypass PCB)

Pin E is shield & case and should go to gnd (I would use the shield of the cable from / to the Bypass PCB).

Ahh.. thank you Volker !!
I‘m gonna rewire and check again.

Potato Cakes

Re: D-AOC PCBs - the building and help Thread
« Reply #1445 on: February 13, 2019, 02:25:01 AM »
My reading skills are failing. I see now that you said no audio when not in bypass. Hence HWBP working, whilst signal through the unit is not. My apologies.

On a side note, I an interested to see yours up and running. I have a completed DAOC board that I have been staring at for a couple of years with the intent of making a mastering compressor, which I have wanted but never really liked any of the expensive ones I've rented. Please continue to keep up updated.

Thanks!

Paul

weiss

Re: D-AOC PCBs - the building and help Thread
« Reply #1446 on: February 13, 2019, 02:37:05 AM »
My reading skills are failing. I see now that you said no audio when not in bypass. Hence HWBP working, whilst signal through the unit is not. My apologies.

On a side note, I an interested to see yours up and running. I have a completed DAOC board that I have been staring at for a couple of years with the intent of making a mastering compressor, which I have wanted but never really liked any of the expensive ones I've rented. Please continue to keep up updated.

Thanks!

Paul
No worries!
I will keep you updated. My only intention is to let this thing end up in my rack  ;D


 

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