I've got a c26 preamp that I use along with a rebuilt Dynaco ST-70, a Sansui tuner, and a couple of turntables in the basement studio ( Sonny #3, 17 is a keyboard player, and down there are a Hammond M3, Leslie, drum kit ( Boy #4)). I've learned to do these things myself over the last couple of years, without spilling too much blood....The Dynaco has a new VTA driver board, upgraded power caps, running Genelex Gold Lion KT-66s. The Hammond and Leslie 145 have been gone through, with some updates as well. My point here is that I've some experience bringing some old, barely working stuff back to life, but I'm no electrical engineer or circuit designer. I enjoy the challenge of making these devices sound better, and learning some fun skills too. Note: This post cut off and timed out before I finished, so I'll go back in and re-create again...... The C26 works fine. , but it was built between '68 and '77. I have limited time, resources, but would like to attack areas that will give me most bang for the buck. Electrolytics? coupling caps? where should I spend my energy and $, since I will not be replacing 100% of the caps on this foray.