On Sunday, 31 December 2017 13:55:06 UTC, Dave Plowman (News) wrote:
In article ,
tabbypurr wrote:

A B&W TV can't show colour - other than that of its phosphor. Assuming
you are talking old CRT sets

Early CRT TVs were known to produce a pink picture when the EHT
partially shorted, causing the current limiting red lamp to light behind
the CRT.

How early are you talking about? I've never heard of that one.

First generation CRT sets used a mains transformer to provide EHT for the CRT. A red pygmy lamp was fitted in series with the mains side for short protection. There's an old story out there about a woman that phoned Ally Pally to congratulate them on the lovely shades of red & pink in the picture only to be told she should switch it off before it caught fire.

The EHT was deadly on these sets.


NT