Test Equipment and Test Tapes

1-1 TEST AND MAINTENANCE EQUIPMENT REQUIREMENTS↑ TOP

All maintenance, electronic, and mechanical test equipment required during maintenance, alignment, and adjustment of the recorder is listed in Table 1-1.

In addition, recommended maintenance periods are shown by accumulative hours of usage and/or elapsed period of time, whichever comes first. Equivalent equipment can be substituted for the equipment suggested in the table.

Table 1-1. Test and Maintenance Equipment

Equipment Type	Suggested Model	Used For	Period
Head cleaner	Ampex 087-007	Cleaning heads and guides	8 hours
Isopropyl or denatured alcohol	Any	Cleaning capstan pinch-roller	8 hours
Q tips	Any	Cleaning heads and guides	8 hours
Head demagnetizer	Ampex 4010820	Demagnetizing heads and guides	8 hours
Lubricating oil	Anderol #456	Oiling of capstan, pinch roller, and guide roller bearings	1,000 hours or 6 months
Spring scales 0-16 oz, 0-32 oz, and 0-10 lbs	Any	Mechanical adjustment	1,000 hours or 6 months
Vacuum cleaner and brushes	Any	General cleaning	1 month
Standard alignment test tape	Refer to Table 1-2 and 1-3.	Reproduce amplifier alignmemt	150 hours or 1 month
Audio oscillator	Hewlett Packard H20-200CD	Overall frequency response and signal-to-noise measurement	150 hours or 1 month
Ac voltmeter (VTVM)	Hewlett Packard 400L or 400FL	Same as above	Same as above
Bandpass filter	Refer to Fig.4-1	Same as above	Same as above
Flutter meter	Meguro Electronics Corp. MK668C or MK669	Flutter and wow, tape speed measurement	Same as above
Wave analyzer	Hewlett Packard 3590A or 310A	Distortion and crosstalk measurement	Same as above
Test cables	Refer to text
Technicians tools
Allen wrenches	Metric
Volt-ohm meter	20,000 ohms/volt any brand	Test and adjustment

The test tapes listed in Table 1-2 and Table 1-3 should be used for the appropriate alignment.

Table 1-2. Flutter Test Tapes

Tape Width (inches)	Speed inches/second	Frequency (Hz)	Ampex Catalog No.
1/4	3 3/4	3000	01-31336-01
1/4	7 1/2	3000	01-31326-01
1/4	15	3000	01-31316-01

Table 1-3 Reproduce Alignment Test Tape

Tape speed	Equalization	MRL Catalog Number	Reference level
15 ips	NAB	21J205	250 nWb/m*²
7 1/2 ips	NAB	21T204	250 nWb/m*²
3 3/4 ips	NAB(IEC)	21F101	200 nWb/m*²
15 ips	IEC	21J303	320 nWb/m*¹
7 1/2 ips	IEC	21T302	320 nWb/m*¹

*¹: Open circuit flux which correspond to 290 nWb/m of short circuit flux.

*²: Short circuit flux.