TV Sign Off Question

[Dale H. Cook]

At 01:43 PM 2/10/2009, A. Joseph Ross wrote:

>Then they finally got a new
>test pattern that looked just like the one WGBH-TV was using, except
>that it had the WHDH-TV call letters and channel number on it.

That was likely a custom monoscope. The beauty of monoscopes was that 
they produced precise images independent of any lenses.

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

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