How to make a studio Battery microphone tube booster preamplifier in very few steps

At your own risk.


This is the Pleiades V6 low noise microphone pre preamplifier .


Connect a fuse holder with a fuse is series with a battery holder. It can be a 3V to 6V battery.


Connect on a 9 pin (noval) tube socket, referring to the EF183 pin out, anode with suppressor grid and screen grid all together. Our EF183 will be in triode configuration.


Connect the primary of an input transformer to the microphone.


Connect one side of the secondary to ground, the other side through a coupling capacitor to the EF183 grid.


Connect one side of the primary of the output transformer to the fuse holder . The other side to triode configuration anode.


The secondary of the output transformer is the balanced output of the booster low noise Pleiades V6 pre preamplifier.


Connect battery minus to cathode, ground and to one side of the heaters.


Connect the other side of the heaters to the battery fuse holder.


Ready!


Enjoy!


You may make your own input and output transformer by winding to the state of the Art Nanocrystalinne Nanoperm cores by Magnetec.


If you need to reduce bass to compensate for the proximity effect you may reduce the number of turns.