The last few days I have been testing and repairing a Magnum Pre-Amp and Power amp I designed for Etude in Belgium now nearly 40yrs ago. I was surprised to see that I had used my long forgotten Patented (now out of date) MC head amp. Even more surprised when testing it that the noise flour was a few dB lower than I expected when one considerer the new device we have today. I thought some of you Techy Buffs would like to see the circuit so here is the basic concept, Have fun.
sorry about spelling chaps wee = we