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Songbird : Requirements III – 2nd Preamp Stage

December 13th, 2008 · No Comments · Uncategorized

2nd Stage

Not sure here.   In fact, I have to admit to a bit of confusion.   See the output of a guitar pickup is roughly 0.5V peak to peak.    Maybe as much as a volt on a high output pickup.   The gain of the first stage is roughly 40 or more.    Now this will be cut down by the volume pot but even so, at full volume would I be seeing 40 V or more going to the grid of the second triode in the 12AX7?   No.  Of course not.   I need to read a bit more, but I think that its current that is actually amplified and that the load will determine the actual voltage change.

What I really need to do is get it on the scope, but clearly, there is a disconnect here.    I have another idea..  stay tuned.

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