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A GRADE VIDEO PANCAKES SPECIFICATION 
(E-240 VHS 1/2 INCH)

1.  Scope

This specification is applicable to the E-240 VHS 1/2 INCH video tapes produced by ACME Magnetic Tapes Ltd.  

2.  Specifications of the Magnetic Video Pancakes

Items

Unit

Technical Data

Specification

Dimension

Thickness

mm

13.5

14±1

Width

mm

12.647

12.65±0.01

Physical properties

Breaking Strength

kg

3.1

>=2.7

Surface Resistance

W/sq

2.3 E 9

<=5.0 E 9

Transparency

%

1.9

<= 1.2

Video properties

RF Output

dB

-1.0

> -2.0

Video S/N

dB

-0.5

> -2.0

CHROMA S/N AM

dB

+0.3

> -1.5

CHROMA S/N PM

dB

+0.5

> -1.0

Average Dropout
(-20dB, 15ms)

Ea/min

13.3

<= 30

 

3.  Pancake Specification

3.1  Pancake Length : The standard pancake length is 3,903m (12,800ft) or requested by the customers.

3.2  Pancake Hub

Items

Specification

Remarks

Material

Plastic

/

Outside diameter

114.4 ± 0.2 mm

/

Inner diameter

76.45 ± 0.3 mm

/

Width

15.2 mm

/

3.3  Pancake Configurations

3.3.1 The oxide side of the pancake is touching the pancake hub and is shown below:

3.3.2 Pancake LOT NO.

E-180  A 4A081H   B 08 1118 -05 06
Model Production
Factory
Batch No. Slitting shift Slitting  No. Slitting Date Pancake No. No. of cut

3.3.3 Appearance of Pancake

The surface of the pancake is smooth and there is no damage on the pancake edge Moreover, no hub drop will be allowed.

 

4. Packing

10 pancakes are packed in 1 carton and cushion sheet is used between every pancake.

 

 

 

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Last modified: December 21, 2011