modified 4 hours ago

Inputstage for MD

00:04:29

InputStage between MD cardtridge (turntable) and RIAA pre-amp.

The FET I used is BF245.
Gate direct connected to MD.
Resistor 47k must match te impedance of the MD element.
Drain to base PNP BC557
Source to 4k7 12k join.

If you use other values and components, than the result can be worser.
Output after 4,7uF at top, or divider.
The divider 2x can set to higher value.
But not lower, test until 47k either.

Simulation FAILS here! a set back.
But work fine on LTspice.
I build the circuit and test for long time.

published 5 hours ago

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