Uniray (Advanced Apple) CRT

This is from Maury Markowitz:

Your page on the Apple tube notes that development was later picked up by an ex-Philco employee as the Uniray. The key improvement was the introduction of low-cost photodiodes that replaced the PMT and thereby dramatically lowered price. Additionally, the much faster response times of transistorized electronics allowed the indexing adjustments to be made in real time, so there was no need for the second index beam.

Popular Science, February 1972