Found an RCA CTC5

[Penthode]

Yes I was lucky to find this. It only goes to show that these sets are still lurking about and one never knows when they will pop up.

Toronto power was 25 Hz for many years. Being close to Niagara Falls, AC power reached Toronto in the 1890's. It was 25Hz from the 1890's until the 1950's. The swich to 60 Hz occurred i thought in about 1952-53 but I expect there were still 25 Hz spots in Southern Ontario Canada in the late '50's.

Incidently, the last 25Hz alternator at Niagara, the William Rankine plant closed just a few years ago.

Here is a link to the history of 25 Hz power:

http://www.ieee.org/organizations/pe...eshistory.html