Conrac CYA 17" Color Monitor

[J Ballard]

The 17" CRT for the CYA was made by Hitachi.

Conrac was shocked when Hitachi, without notice, discontinued the manufacture of that CRT. There was no advance warning, as legend ahs it. The company produced ads that ran in industry publications acknowledging that they had a delivery problem, but later struck a deal with RCA to make the CRTs. Conrac was promoting the controlled phosphor (tight tolerance) concept in order to allow closer matching of monitors. The SMPTE C phosphor set is the Conrac (C) coordinates.

Conrac produced modification kits for the CYA that would permit the newer RCA tubes. The original Hitachi tubes were 70 degree tubes, so the modification may have included a new yoke, FB,etc. I do know that there was a Mod "G" version that included many updates, including a DC filament supply.

Later, RCA stopped making the controlled phosphor tubes, and Conrac turned to Matsushita, who also later discontinued production of these low volume CRTs. The Model 6100 used Matsushita CRTs and yokes.

There was also a 21" version of the CYA, and maybe for the CYB.

Hope this helps.

JB