Kevin

TP812 - 8 Channel THAT 1512 Preamp
« on: November 03, 2020, 12:55:48 AM »
Hi Friends
Since the last weeks i'm designing a 8 Channel easy to use Preamp
i used That 1512 and 1646 for Outputs. In my Version I added PAD,PHANTOM and POLARITY Switches, controlled by Relay. Also added an signal indicator and Clip LED
Its running on +15V/-15V,Relays working on a separate 12V Rail. I will offer Partial or Full Kits. More info in my White Market Thread:









White Market Thread
https://groupdiy.com/index.php?topic=76303.0
« Last Edit: November 03, 2020, 01:53:43 AM by Kevin »


uptownsquash

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #1 on: November 03, 2020, 01:15:13 AM »
This looks in incredible! It’s neat and compact! Great work on this one!
I’m for sure interested!

Also, based on the other things you’ve been designing, I’m defiantly interested in anything your build!

Ricardus

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #2 on: November 03, 2020, 12:28:42 PM »
Very nice!
Audio mastering for hire..

elskardio

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #3 on: November 03, 2020, 01:20:36 PM »
Beautiful design! Congrats

What potentiometer are you using? I never found one that gave a perfect Gain/Rotation curve with the 1512....

Thanks

Kevin

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #4 on: November 03, 2020, 01:39:39 PM »
I use Alps dual 10k reverse log potentiometers
In normal operation just 10k is soldered, but both decks can be soldered together to give 5k in total. I like 5k in total a bit more, it feels a bit smoother ;)

BerndVP

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #5 on: November 03, 2020, 02:11:07 PM »
Is this based on some SSL style Preamp or ?

john12ax7

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #6 on: November 03, 2020, 04:01:52 PM »
Nice work.

Kevin

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #7 on: November 03, 2020, 05:04:04 PM »
Is this based on some SSL style Preamp or ?
No that's mostly a that chip pre amp based on the THAT 1512 Chip. I also don't think that SSL ever used this chip. I know spl like to use this chip for their tube mic preamp.

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #8 on: November 14, 2020, 11:00:16 AM »
Nice! Which rack case are you using? It looks great...

plimousse

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #9 on: November 14, 2020, 11:29:34 AM »
Nice work !
Congratulations.


Kevin

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #10 on: November 22, 2020, 05:32:24 PM »
Nice! Which rack case are you using? It looks great...
I basically use an modushop 230mm  case for that. Panels made by Frank.

NoBass

Re: TP812 - 8 Channel THAT 1512 Preamp
« Reply #11 on: January 01, 2021, 08:06:48 AM »
Great design, congrats!

The sudb 25 is a nice touch as well.

How do you like it sound-wise?


 

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