[QuadList] Ampex Quad VTR Airflow Requirements

[Dennis Degan]

		On Jun 2, 2012, at 1:20 PM, Don Norwood wrote:

 > Very interesting what you said about the RCA machines increasing  
the guide vacuum during wind.  I didn't know that.  Most of my RCA  
experience was TRT-1B and a little TR-22.  After that, almost all  
Ampex except for a few minor encounters.

		I offer:

	I remember RCA machines had a habit of 'zinging' during REW/FF (tape  
touching the spinning heads).  By increasing the guide vacuum, this  
could be minimized.  I don't recall Ampex VTRs ever 'zinging', however.

			Dennis Degan, Video Editor-Consultant-Knowledge Bank
					     NBC Today Show, New York