Lopez amp preamp

Here is a close-up of the low-level stages (preamp, reverb recovery, and mixer). The large blue capacitors are non-electrolytic bypass capacitors for the cathode circuits.

It's not easy to see in this photo, but the tone stack components are mounted on a 5-lug terminal strip just to the right of the three large filter capacitors. The terminal strip stands on a threaded spacer that shares one of the mounting screws for the turret board. By mounting the tone stack components near the controls, I was able to replace three runs of shielded cable with a single run.

Copyright © 2005 John D. Polstra
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