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Re: Question for Ralph on MP1

Posted by Lew (A) on August 11, 2005 at 10:50:51

In Reply to: Re: Question for Ralph on MP1 posted by Ralph on August 10, 2005 at 11:21:49:

I decided to call it an OCL, because most conventional commercial preamps are capacitor-coupled; of course it is also an OTL preamp.

I guess I could look this up, but as long as we are on line, then what is the total gain (phono+linestage) available from the phono-connected MP1? I ask because I am running a Koetsu Urushi, said to give 0.6mV output. On good days, the gain is adequate, but on other days I am hurting. This is mostly due to the fact that I use the Sound Lab M1 speakers, and their efficiency is highly sensitive to the humidity in this jungle we call Washington, DC (Bethesda, MD, actually). So on bad days I start to wish I had a step-up transformer or some other way to increase phono gain. (As you know, I am contemplating building a separate power supply for the phono section, which might allow me to use a higher Gm tube at the phono input and thereby increase phono gain without a step-up transformer).

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