Why Did They Change?

[Pete Deksnis]

There is a tiny note with a plethora of patent holders pasted to every CT-100 cabinet. I'd guess it is in 2-point type! or so. AT&T, Farnsworth, GE, Hazeltine, N.V. Philips, Philco, Westinghouse, and it says "others"...

So it is likely patent payment may well have been a factor.

To decode the R-Y signal, the quadrature transformer changes from a TRV365T in the CT-100 to a TRV-370T in the 21-CT-55.

Pete