Tape Machine Bias Charts

A-827 Bias Chart
			30 IPS	15 IPS
Tape		Overbias	Overbias
Agfa 468		1.5 db	3.5 db
Ampex 456	1.5 db	3.5 db
Ampex 499	2.0 db	4.0 db
BASF 910		1.5 db	4.5 db
BASF 911		3.0 db	4.5 db
3M 250		1.5 db	3.5 db
3M 996		2.0 db	3.5 db



Revised: G.L. 8/22/97
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ATR-100 Bias Chart
Tape		Speed	Overbias
Ampex 499	30 IPS	2.0 db
			15 IPS	4.0 db
Ampex 456	30 IPS	1.75 db
			15 IPS	3.0 db
3M 996		30 IPS	2.0 db
			15 IPS	4.0 db
3M 250		30 IPS	1.5 db
			15 IPS	3.0 db
3M 226		30 IPS	1.5 db
			15 IPS	3.0 db


Revised 9/24/96
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A-800 MkIII Bias Chart
Tape		Speed	Overbias
Ampex 499	30 IPS	2.0 db
			15 IPS	3.0 db
Ampex 456	30 IPS	1.75 db
			15 IPS	3.5 db
3M 996		30 IPS	2.0 db
			15 IPS	4.0 db
3M 250		30 IPS	1.75 db
			15 IPS	3.5 db
3M 226		30 IPS	1.5 db
			15 IPS	3.5 db


Revised 12/7/95
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APR-24 Bias Chart
Tape		Speed	Overbias
Ampex 499	30 IPS	2.0 db
			15 IPS	4.0 db
Ampex 456	30 IPS	1.75 db
			15 IPS	3.0 db
3M 996		30 IPS	2.0 db
			15 IPS	4.0 db
3M 250		30 IPS	1.5 db
			15 IPS	3.0 db
3M 226		30 IPS	1.5 db
			15 IPS	3.0 db
Agfa 468		30 IPS	1.75 db
			15 IPS	3.5 db

APR-24 2nd Functions
Tape		RGC	SGC	RCF	RCB
499 @ 30 IPS	c1	c1	c0	c1
499 @ 15 IPS	c1	c0	cb	c7
456 @ 30 IPS	c1	c1	c0	c1
456 @ 15 IPS	c1	c0	cb	c7
996 @ 30 IPS	c1	c1	c0	c1
996 @ 15 IPS	c1	c0	cb	c7
250 @ 30 IPS	c1	c1	c0	c1
250 @ 15 IPS	c1	c0	cb	c7
226 @ 30 IPS	c1	c1	c0	c0
226 @ 15 IPS	c1	c0	c3	c4
468 @ 30 IPS	c1	c1	c0	c1
468 @ 15 IPS	c1	c0	cb	c7



Revised 12/7/95
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