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 alignment	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.