High frequency high voltage transformers are made as usual using ferrite EE or ETD cores. The entire assembly is potted in a plastic casing with mounting pins or flying leads for high voltage if required.    

The time period may be large (400cps) or small with high frequencies of several MHz; the secondary voltage may be small (for transmitting pulses in communication) or large (several kilovolts for a switching transformer in high voltage supplies); the high voltage types are g... 

Anant sensing transformers are generally ferrite EE core or RM core transformers for sensing 16kHz signals on telephone lines for use in EPABX or PCO machines.

Generally used in EPABX systems for transferring signals on multiple lines efficiently.  

We develop and mass produce all kinds of toroidal transformers including Power Transformers, Line Filters on latest and high speed winding machines.