jordan s

24V from 500 PSU?
« on: February 22, 2019, 06:33:08 PM »
I'm trying to rack up an 1108 preamp in a 500 series module, is there any reliable way to get 24V from the 16V bipolar 500 series PSU?


pucho812

Re: 24V from 500 PSU?
« Reply #1 on: February 22, 2019, 06:59:16 PM »
yes. 

It's been done, I can show you when I get in but the real question comes down to current draw and availability of  current for the 1108 circuit.

 you can use a small DC-DC converter, You can also do it with a 7824 and instead of reverence to ground, the ground pin goes on the negative side... I have the exact deets on a design where we implemented it that way. let me pull it up and get back to you.
« Last Edit: February 22, 2019, 07:03:13 PM by pucho812 »
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

john12ax7

Re: 24V from 500 PSU?
« Reply #2 on: February 22, 2019, 11:30:52 PM »
Look here for some useful info:

https://groupdiy.com/index.php?topic=28577.0

iampoor1

Re: 24V from 500 PSU?
« Reply #3 on: February 23, 2019, 12:28:12 AM »
Mc34063 dc-dc converter followed by lm7824 or lm317 linear supply. :)

jordan s

Re: 24V from 500 PSU?
« Reply #4 on: February 23, 2019, 02:57:37 AM »
Look here for some useful info:

https://groupdiy.com/index.php?topic=28577.0

Some interesting info here but unfortunately, I don't think the meeting of the minds ever produced a final verified schematic.  Peter's last schematic MIGHT work but it looks like an overly complex solution. I am honestly not savvy enough to design my own which is why I implore the good people of this forum to share their methods.

jordan s

Re: 24V from 500 PSU?
« Reply #5 on: February 24, 2019, 07:27:33 PM »
Pucho, care to share your design?

pucho812

Re: 24V from 500 PSU?
« Reply #6 on: February 24, 2019, 09:01:40 PM »
While I can't give out the schematic due to NDA
it's like this. in a basic form you have +16 from the API rack feeding into a 7824 regulator.  from there the GND of the 7824 ties into the -16 the end result is an output of +24VDC.  any caps and diodes need are added as required.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


 

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