Sun Tach ST502 Restoration: Sender-Free Upgrade

This Sun Tach ST502 required extensive movement cleaning and repair. Its failed circuit board was replaced with our in-house design, simplifying installation to just two wires (Signal and Ground) – no sender unit needed!

Our Restoration Steps:

• Full teardown (chrome sent for replating)
• Movement cleaned, balanced, and pointer re-glued
• Face repainted, silk-screened, and clear-coated
• Housing thoroughly cleaned
• Upgraded circuit board installed (sender unit eliminated)
• Wires labeled, new chrome installed, unit sealed

This restoration provides the classic Sun Tach ST502 aesthetic with significantly improved ease of use and reliability thanks to the sender-free circuit board. Contact us to simplify your vintage gauge setup!