Whoops

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #220 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 #221 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 #222 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 #223 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 #224 on: May 13, 2020, 01:03:57 AM »
Ahh, will do. Thank you much, for your responses.

louder

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #225 on: June 28, 2020, 07:35:18 AM »
Hello
Long time no see.
After reading the whole thread one doubt... J309 it's out of production... Beside eBay where can I get some?
Best regards

TwentyTrees

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #226 on: June 28, 2020, 07:59:26 AM »
Cricklewood Electronics in London seems to have them in stock:
https://www.cricklewoodelectronics.com/J309.html

Hello
Long time no see.
After reading the whole thread one doubt... J309 it's out of production... Beside eBay where can I get some?
Best regards

louder

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #227 on: June 28, 2020, 09:22:54 AM »
Thanks
Regards

Whoops

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #228 on: June 28, 2020, 03:47:45 PM »
Hello
Long time no see.
After reading the whole thread one doubt... J309 it's out of production... Beside eBay where can I get some?
Best regards

Mouser has J309 in stock:

https://www.mouser.com/ProductDetail/InterFET/J309?qs=OxRSArmBDfxFLq%252BlAKFMwA%3D%3D

Probably any of this would work well also as a replacement:

2SK170
LSK170
2SK370
2SK117
2SK369
2N5457
2N5486
BF862

louder

Re: [BUILD] 1108 DIY project and PCB layout
« Reply #229 on: June 28, 2020, 06:15:26 PM »
Thank you.
Obrigado


 

Related Topics

  Subject / Started by Replies Last post
24 Replies
11880 Views
Last post April 24, 2006, 03:10:45 PM
by CJ
25 Replies
10636 Views
Last post July 16, 2008, 11:15:49 PM
by AJMAC
2 Replies
2056 Views
Last post January 18, 2010, 04:00:37 PM
by oilcanstudios
18 Replies
10943 Views
Last post August 27, 2013, 06:22:09 PM
by j.frad