Whoops

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #220 on: May 12, 2020, 09:25:26 AM »
Also, dwould the mnats variable voltage 48 psu help me, and any chance it would fit in the 500 slot?

Why do you need another PSU on the module?
The 500 series rack already has its own PSU, with + and - 16v and +48V.
You just need to accommodate a DC converter in your build to convert +16v to +24V.
The 48v rail goes from phantom power.

Better you design a new PCB for the 500 series with the adaptations in mind.


Re: [BUILD] 1108 DIY project and PCB layout
« Reply #221 on: May 12, 2020, 04:21:20 PM »
ya the extra psu doesn't make sense.

Designing a new pcb is above me but im up for the challenge. I have come across the dc to dc converter idea and some seem to think its overpriced for something that can be implemented more simply. However, I've heard mixed feeling on using a regulator with the -16v as a floating ground?...something along those lines.

I do not mind the price so much as i'd really like to get  this project to work, but i am unsure of the schematic for implementing the dc to dc converter. Rest assured i'll be doing my searching/googling on the converter, but any help on this front would be deeply appreciated...

Whoops

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #222 on: May 12, 2020, 06:00:01 PM »
Neve 1290 (the preamp circuit on the 1073) uses +24v.
And there's a lot of modules based on this preamp  for the 500 series .

Check the schematics for those and see how they implemented the +16v to +24v

https://groupdiy.com/index.php?topic=41147.0

https://groupdiy.com/index.php?topic=33492.0


Saying this, there's much more simple projects to pursue for someone with your experience so chasing this one for the 500 series might be too much.
There's already a lot of amazing preamps for the 500 series, with pcbs already made and the project well documented

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #223 on: May 12, 2020, 06:13:57 PM »
Thank a lot for those. I'll study them

I hear you man. I built an 1176 rev D a few years ago and love using it as a pre amp so I'm pretty set on the 1108 so I'll keep at it for some time.

Another question: My rack (Radial workhourse 8) has a TRS omni port on the back for each channel that corresponds to pin 7 and 9. Would it be possible to send 24 volts through the omni port via another power supply or is this insane?

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #224 on: May 12, 2020, 10:21:43 PM »
So I studies the don classics nv73 converter circuit from the schematic. Given my limited knowledge  it looks exactly like what I need but am unsure after playing around in lt spice (for the first time). I would be willing to pay someone to help me figure this out. Hopefully this is an appropriate post... please remove if not.

Whoops

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #225 on: May 13, 2020, 12:47:08 AM »
So I studies the don classics nv73 converter circuit from the schematic. Given my limited knowledge  it looks exactly like what I need but am unsure after playing around in lt spice (for the first time). I would be willing to pay someone to help me figure this out. Hopefully this is an appropriate post... please remove if not.

as this thread is for another 1108 project, not the one you're after, I think you will be better in doing a new thread for a 1108 project in the 500 series format, to gather some help and have the relevant info compiled there

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #226 on: May 13, 2020, 01:03:57 AM »
Ahh, will do. Thank you much, for your responses.


 

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