© Telechronclock LLC
Telechron Coil Assemblies:
The Telechron coil assembly powers the rotors via magnetic induction. They are self
starting by way of a shaded pole affect. Telechron Coils are generally matched to
the series of rotor they power. (ex: S, H-
If the coil hums, gets warm (not hot), has magnetic attraction on the iron lamination
then the coil is generally electrically OK. Most coils measure about 600 -
Note: Telechron rotors are easy to replace but any work on the electrical portion of a clock like the coil assembly is best left to a clock repairman experience in electrical repairs.
Here are the common Telechron Coils:
Telechron B Coils:
These coils measure about 2-
Most B coils have electrical leads vs. solder terminals.
Some B coils also powered the small low voltage lamp in early Telechron clocks. (note the 4 wires)
These coils are the same dimensions as B but they are 3/16" thick and have 6 iron lamination layers. They almost always have terminal strips vs. leads. Some of these coils have small brackets to support knob shafts and alarm features. These brackets can generally be easily transferred to other coils.
Telechron S Coils:
The Telechron S coils came in different form factors. The most common, (bottom image),
has the same dimensions as the H-
There's also a small frame S coil that's typically used in stove and range clocks.
The coil measures 1-
Telechron also producing other form factors depending on the application. The top image is a coil used in flip clock radios.