Midas TR04 Input Strip requires power supplies.
« on: November 13, 2019, 01:48:09 PM »
Hi,
i have a Midas TR04 input strip that id like to turn into a stand alone mic preamp. It requires a plus/minus 16volt supply to power it and a phantom power supply.  I would like to build these from scratch and already have the transformer from a green mic pre i built, its  36volt centre tap.

Looking for schematics of  power supplies that will do this with this transformer.
I have tried looking around but have a slow dial up connection which makes it impossible.
Ask what you like?
Thx All




mjrippe

Re: Midas TR04 Input Strip requires power supplies.
« Reply #1 on: November 14, 2019, 01:08:56 AM »
First, my condolences for your internet connection.  I'm old enough to have used a 300 baud modem and I still remember anxiously waiting as the characters appeared on the screen one at a time.  Frustrating then and now.

Second, can't you just use the power supply design from the green pre?  I'm guessing it is +/-15v and +48 as well, but correct me if I am wrong.  If that supply is not adjustable to 16v, the Midas will still work fine with 15.

Re: Midas TR04 Input Strip requires power supplies.
« Reply #2 on: November 14, 2019, 01:33:41 PM »
Thx mjrippe, Your right i could use a green pre power supply and have plugged it in using the one i built a decade ago. It does work
but i didnt build the phantom power in on the original. I no longer have access to any of the green pre schematics as they wont load for me
so i thought i would start from scratch with the transformer i have ( Hammond 36VCT 300ma) and build a power supply with
 phantom power all in one.
This will be my main vocal channel when done so i just want to build something solid.
Anyway thx for the reply.
If anyone has time to post the green pre power supply schematic with phantom power i would greatly appreciattte it.
Go dial up!!!
Thx again


 

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