[QuadList] QuadQuiz--Why did RCA choose 6-mil head width for Super High Band experiments

[Norm Hurst]

 I think they used azimuth encoding on adjacent tracks to allow zero guard band, like what was used on some VHS formats.

Azimuth encoding involves slightly tilting alternate head gaps so that adjacent tracks would be unreadable due to azimuth misalignment.


Sent from my Verizon Wireless 4G LTE Smartphone

-------- Original message --------
From: trandoc at aol.com 
Date: 07/01/2013  4:40 AM  (GMT-05:00) 
To: quadlist at quadvideotapegroup.com 
Subject: Re: [QuadList] QuadQuiz--Why did RCA choose 6-mil head width for Super High Band experiments 
 
Ted,

Super High Band allowed the use of 7 1/2 IPS to achive the same S/N and needed narrow heads to avoid guard band issues. 

I guess Type C doomed quad use by this time?

Harold



-----Original Message-----
From: Ted Langdell <ted at quadvideotapegroup.com>
To: QuadList <QuadList at quadvideotapegroup.com>
Sent: Sun, Jun 30, 2013 4:59 pm
Subject: [QuadList] QuadQuiz--Why did RCA choose 6-mil head width for Super High Band experiments


What was RCA's rationale for choosing to use 6-mil heads for their experiments with Super High Band on a TR-70C?

Some SMPTE members may know the answer.

Bonus question:  Why didn't Super High Band (or Ampex's Super High Band Pilot) get any marketplace traction.

Good luck and hope your part of the country is staying relatively cool.  

We're at 108, our expected high for today... heading for 109 tomorrow and 111 Tuesday and Wednesday in the central Sacramento Valley of California.

Is that hot enough to melt Quad Tape on the Sidewalk?  The forecast says it'll be hotter than the Fourth of July.

Ted

Ted Langdell
Secretary
Skype: 	TedLangdell
e-mail:	ted at quadvideotapegroup.com



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