Jrc

Tube-tech mp1a (gyraf ver.) input transformator spec ?
« on: May 07, 2020, 06:04:33 PM »
Hello,

Can someone help me find the specifications for the input transformers in Jacob’s ver of the mp1a.
I will most likely try to wind it myself, so any details are welcome.

Jr


gyraf

Re: Tube-tech mp1a (gyraf ver.) input transformator spec ?
« Reply #1 on: May 08, 2020, 12:29:19 PM »
Transformers were custom made by Tradania for those, and not available for the masses - perhaps try something like 1:7 or 1:10, this is a common range for interfacing to tube grid inputs..

But please remember that this is a unit that is still in production (!!)

/Jakob E.
..note to self: don't let Harman run your company..

Jrc

Re: Tube-tech mp1a (gyraf ver.) input transformator spec ?
« Reply #2 on: May 08, 2020, 04:57:30 PM »
Thanks & onskul

gyraf

Re: Tube-tech mp1a (gyraf ver.) input transformator spec ?
« Reply #3 on: May 09, 2020, 05:43:29 AM »
:-)
..note to self: don't let Harman run your company..

ruffrecords

Re: Tube-tech mp1a (gyraf ver.) input transformator spec ?
« Reply #4 on: May 09, 2020, 06:15:22 AM »
Winding your own could be a serious challenge. As Kakob says, a 1:7 or 1:10 ratio is typical for tube mic pre input transformers. You should aim for the primary inductance at 100Hz to be about 5H for good bass response. You will need pretty fine wire for the secondary and to achieve the inductances required and to minimise distortion you will need a mu metal core. Also you will need electrostatic screens between the primary and secondary. Good luck!

Cheers

Ian
www.customtubeconsoles.com
https://mark3vtm.blogspot.co.uk/
www.eztubemixer.blogspot.co.uk


'The only people not making mistakes are the people doing nothing'


 

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