Modifying Tube Preamp Circuitry

Below is a link to a great article about modifying preamp circuitry that you can find on http://ratcliffe.co.za/sundry/Modify_Preamp_Circuitry.pdf .

Alan has a great guitar resource web site at:  http://ratcliffe.co.za

I asked Alan Ratcliffe if I could post this to my site and he agreed!  Thanks Alan!