TV Sign Off Question

[Dale H. Cook]

At 8:14 AM 2/10/2009, Joe Brown wrote:

>I have a client who is looking for a photo if possible. He seems to 
>remember one of the TV stations in the 60's would sign off the air 
>at midnight and the screen would go to a picture of an Indian.
>
>He tells me it is NOT the one with the Indian at the 12:00 position. 
>He is insistent that the Indian head was full screen or so.

I do not recall ever seeing such a test pattern, and I spent some 
time studying them when I was a TV Chief Engineer.

The "12 o'clock" Indian head test pattern was most commonly seen in 
the RCA TK-1 series of monoscopes. A monoscope is a modified TV 
camera incorporating a test pattern in the pickup tube. The "mono" in 
"monoscope" comes from the fact that it can display only one image.

Dale H. Cook, Chief Engineer, Centennial Broadcasting, 
Roanoke/Lynchburg, VA - WZZI / WZZU / WLNI / WLEQ
http://plymouthcolony.net/starcity/starcity.html 

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