This is more of an express video of a Heathkit IT-12 signal tracer restoration since it closely matches that of the T4. The big difference in this series is that much more attention is payed to the DC circuit and rectifier to determine if further noice reduction can be attained by replacing the single diode selenium rectifier with more modern upgrades
#heathkit #testequipment #restoration
![](https://i.ytimg.com/vi/fqmOQv1QJ3U/maxresdefault.jpg)