Classic Valve Design
Whether you have an ST/SCA35, ST70, Mark 2, 3 or 4, we offer modernization and upgrades.

Choose your chassis style, original circuit or aftermarket driver and power supply boards or just a general cleanup and re-finish of your original chassis.

Bring your old Dynaco in for a consultation. We will test the continuity of your transformers for $20 for up to three amplifier units (we have had clients bring us a trunk full). If your original iron is still useable, a finished rebuild can be quite inexpensive!

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