1949 Sparton mirror lid on portland, OR CL

[compucat]

Since this set uses a 10BP4, why must it be a mirror in lid? The 10BP4 was used in many direct view sets. I thought the whole reason behind the mirror in lid design was because CRT necks used to be very long. The 10BP4 neck is not that long. Just wondering.

[Mal Fuller]

Originally Posted by compucat

Since this set uses a 10BP4, why must it be a mirror in lid? The 10BP4 was used in many direct view sets. I thought the whole reason behind the mirror in lid design was because CRT necks used to be very long. The 10BP4 neck is not that long. Just wondering.

It likely has a mirror because it would be a PIA to have to stand and watch it. Besides, if it's set up for a mirror, the picture would be backwards when viewed directly.