Vintage Sun Machines  

Keeping an American tradition of quality alive!

Sun Tach Dwell Tester

This is a nicely preserved model Tach/Dwell-Tester (TDT-11) It had a battery leak from the "D" cell which powers the dwell and resistance side of the unit, while the 266 9V battery powers the RPM side.

The original 9V is still in there and to my surprise it's not leaked and still retains a 4-7v charge -- talk about longevity!

Here are the pics -- a few tests showed that the dwell adjustment and ca
libration pot was weak and needs to be replaced. A quick search on  the internet found both a new 9V Eveready battery and a suitable potentiometer