Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #120 on: January 30, 2019, 01:57:39 AM »
Can anyone please tell me which power transformer to hook up to the ML12 PSU? 110in 24 out? Not really sure and want to try purchase the correct thing. thank you so much.


TillM

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #121 on: January 30, 2019, 02:58:04 AM »
Look in the thread there was also discuss some options.

Rocinante

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #122 on: January 30, 2019, 09:11:51 AM »
If you go to mouser, and look up a avel 24v toroidal you'll get one of the ones you need listed. Probably want 25va too depending on how many Mic preamps you are powering.
If there's a harder way to do this, I haven't found it yet.

dp

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #123 on: April 20, 2019, 10:15:01 PM »
Thinking about building a couple of these.

Question about power transformer... this will work or is 50VA overkill?

http://www.antekinc.com/as-0518-50va-18v-transformer/

I have used Antek power supplies for some tube guitar amp builds in the past and have been happy with the results. That 50VA is only $17.50! A 25VA 20V transformer is also available for only $11.

Also, sort of related... could the ML12 PSU PCB be used for the EZ1290 project as well? Like, if I made an external PSU could I use that one PSU to power both projects?

Thanks all.

TillM

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #124 on: April 22, 2019, 09:09:16 AM »
Yes this will work.
But also 30va should work.
Maybe also 25va, but I’m not sure.
The ML12PSU would work with the ez1290, but you can’t take it with the ML12.
Only if you also use your ML12 with 24v rail instead of 16v.
But then you have to look, that your DOAs can take 24v.

dp

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #125 on: April 22, 2019, 10:13:42 AM »
OK Cool. Thanks TillM.

dp

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #126 on: April 22, 2019, 11:04:58 AM »
I have a couple 2U donor rack chassis, so if I start small I want to be able to upgrade them down the road. Looking a little deeper at the thread here, it looks like maybe this is the general rule-of-thumb?

2x18V with 10VA current per preamp?

dp

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #127 on: May 03, 2019, 11:42:00 AM »
Yes this will work.
But also 30va should work.
Maybe also 25va, but I’m not sure.
The ML12PSU would work with the ez1290, but you can’t take it with the ML12.
Only if you also use your ML12 with 24v rail instead of 16v.
But then you have to look, that your DOAs can take 24v.

Couldn't I use set up rails 1 & 2 to +/-16V and rail 3 to 24V to use both ML12's and the EZ1290 with just one ML12 PSU?

I have seen the JLM and Five Fish PSU kits but I can source the parts and P.T. for a lot cheaper if use the Antek power transformer. Are there any other good alternatives?

TillM

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #128 on: May 05, 2019, 06:18:31 AM »
then you will need a extra rail for the phantom power +48v rail.

dp

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #129 on: May 05, 2019, 11:52:31 AM »
I'm sorry I thought I posted a reply about this earlier... I must not have hit submit.

But, I emailed DIYRE last week and asked... and yes just as I suspected what I propose will work just fine with that Antek 18V/50VA PT... two channels of the ML12 and two channels of the EZ1290 pres, building them one at a time as I get the funds.

It's a 4-rail supply. Rails 1&2 are +/- adjustable, rail 3 is adjustable, and rail 4 is fixed at +48V for phantom power.

https://www.diyrecordingequipment.com/collections/parts/products/ml12-psu-power-supply-pcb

So, the ML12 PSU PCB would be a great option for those who would like to do a mix of different preamps in the same enclosure.  :)
« Last Edit: May 05, 2019, 12:00:23 PM by dp »


TillM

Re: Whistle Rock Audio ML12 preamp BUILD/HELP thread!
« Reply #130 on: May 05, 2019, 05:54:24 PM »
it has 4 rails !
thanks for letting me know, then I've to check again, how I wired it up.