[QuadList] One Inch A Format Recovery

[Don Norwood]

Many, probably most, of the Type-A tapes that we receive are hi-band as in the example that David has shown.  However, for those not familiar with the format, "Hi-Band" in Type-A is not the same as the quad and Type-C frequencies.  It's basically equivalent to LBC in quad.  Actually, Ampex referred to the Type-A modes as "Carrier", so they had Low-Carrier (as in LBM for quad), High-Carrier (LBC Quad), and then Very-High-Carrier (same as HBC quad and Type-C).  The VHC mode was introduced to the Type-A format with the VPR-7900.  They also moved the head switching to the vertical interval, and so tapes made in that mode look very much like Type-C recordings.  

Don Norwood
Digitrak Communications, Inc.
www.digitrakcom.com

----- Original Message ----- 
  From: David Crosthwait 
  Ed,

  Here is an OTA recording made in 1974 from a University in Texas. The record machine was a VR-7800 in high-band. The receiving antenna was about 40 miles from the transmitter. Off air reception was not the best via a Conrac vacuum tube tuner. The TV station was running RCA TK-44A's.

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