How often should you demagnetize a recorder's magnetic heads?

How often should you demagnetize a recorder's magnetic  heads?
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1 Answer

Answer :

Every 8 to 25 hours depending on the manufacturer's  recommendations.
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Related questions

What type of equipment should you use to demagnetize your recorder's magnetic heads?

Description : What type of equipment should you use to demagnetize your recorder's magnetic heads?

Last Answer : A hand-held degausser like the manual degaussers used for degaussing magnetic tape.

How should you clean your recorder's magnetic heads?

Description : How should you clean your recorder's magnetic heads?

Last Answer : With a cotton-tipped applicator soaked in either isopropyl alcohol or a head cleaner recommended by the recorder's manufacturer.

Magnetic tape recorders can have up to three different heads installed. What are the three functions performed by a recorder's heads?

Description : Magnetic tape recorders can have up to three different heads installed. What are the three functions performed by a recorder's heads?

Last Answer : Record, reproduce, and erase.

After using a tape that was stored in an area where temperatures exceeded 130º F you notice pieces of oxide sticking to the recorder's tape-transport mechanism, to its magnetic heads, and onto the tape. What is the probable cause of these symptoms?

Description : After using a tape that was stored in an area where temperatures exceeded 130º F you notice pieces of oxide sticking to the recorder's tape-transport mechanism, to its magnetic heads, and onto the tape. What is the probable cause of these symptoms?

Last Answer : Oxide shedding. At temperatures above 130º F, oxide coating becomes soft and sheds.

Why are record heads always placed before reproduce heads on recorders?

Description : Why are record heads always placed before reproduce heads on recorders?

Last Answer : Allow you to monitor the signals you're recording.

What two specifications determine the maximum frequency that a recorder's record and reproduce heads will be able to transfer?

Description : What two specifications determine the maximum frequency that a recorder's record and reproduce heads will be able to transfer?

Last Answer : a. Size of the headgap. b. Speed of the magnetic tape.

What are the four basic parts of a magnetic tape recorder's tape transport system?

Description : What are the four basic parts of a magnetic tape recorder's tape transport system?

Last Answer : a. Tape reeling system. b. Tape speed control system. c. Electronic subsystem. d. Basic enclosure.

What number harmonic is the primary harmonic distortion in magnetic tape recorders?

Description : What number harmonic is the primary harmonic distortion in magnetic tape recorders?

Last Answer : Third-order harmonic.

List four factors that can degrade the frequency response of magnetic tape recorders.

Description : List four factors that can degrade the frequency response of magnetic tape recorders.

Last Answer : a. A too-high or too-low bias signal level setting for the record head. b. An improper reproduce head gap. c. An improper tape transport speed. d. Poor tape-to-head contact.

What two types of record and reproduce electronics are used by magnetic tape recorders?

Description : What two types of record and reproduce electronics are used by magnetic tape recorders?

Last Answer : . a. Direct record (AM). b. Frequency modulation (FM).

What method for erasing magnetic tape is much more effective and reliable than using a recorder’s erase head?

Description : What method for erasing magnetic tape is much more effective and reliable than using a recorder’s erase head?

Last Answer : Using a magnetic tape degausser

What are two disadvantages of using a recorder’s erase head to erase data recorded on a magnetic tape?

Description : What are two disadvantages of using a recorder’s erase head to erase data recorded on a magnetic tape?

Last Answer : Using an erase head is slow, and it may not completely erase the tape.

Digital magnetic tape recorders used to store and retrieve digital data fall into what three categories?

Description : Digital magnetic tape recorders used to store and retrieve digital data fall into what three categories?

Last Answer : a. Computer-compatible digital tape recorders. b. Telemetry digital tape recorders. c. Instrumentation digital tape recorders

. How do tape transports with differential velocity capstans maintain a constant tape tension in the area around the magnetic heads?

Description : . How do tape transports with differential velocity capstans maintain a constant tape tension in the area around the magnetic heads?

Last Answer : The supply capstan is slightly larger than the take-up capstan. This causes the take-up capstan to pull the tape slightly faster than the supply capstan feeds the tape.

What are four sources that can cause magnetic heads to become magnetized?

Description : What are four sources that can cause magnetic heads to become magnetized?

Last Answer : a. During ac power losses. b. During testing. c. Because of stray magnetic fields. d. From normal use.

In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?

Description : In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?

Last Answer : Voice coil servo.

What part of a floppy disk drive transport uses a dc stepper motor to position the magnetic heads over the recording surface of a floppy disk?

Description : What part of a floppy disk drive transport uses a dc stepper motor to position the magnetic heads over the recording surface of a floppy disk?

Last Answer : Actuator arm assembly.

What are the three functions of the magnetic heads on a magnetic recording device?

Description : What are the three functions of the magnetic heads on a magnetic recording device?

Last Answer : a. Record the signal onto the recording medium. b. Reproduce the signal from the recording medium. c. Erase the signal from the recording medium.

What type of reeling system best controls a tape recorder's tape tension during starts and stops?

Description : What type of reeling system best controls a tape recorder's tape tension during starts and stops?

Last Answer : A tape buffering reeling system

What causes flutter in a tape recorder’s output?

Description : What causes flutter in a tape recorder’s output?

Last Answer : Non-uniform tape motion caused by variations in tape speed.

A recorder’s harmonic-distortion specification reads 2% third harmonic of a 100-kHz signal at 60 ips. What does this mean?

Description : A recorder’s harmonic-distortion specification reads 2% third harmonic of a 100-kHz signal at 60 ips. What does this mean?

Last Answer : The recorder has 2% third-harmonic distortion of a 100-kHz signal at 60 ips.

Technical manuals for tape recorders can state the SNR in what three different ways?

Description : Technical manuals for tape recorders can state the SNR in what three different ways?

Last Answer : a. Root-mean-square (RMS) signal-to-RMS noise. b. Peak-to-peak signal-to-RMS noise. c. Peak signal-to-RMS noise.

You plan to measure your tape recorder’s SNR. What test equipment will you need?

Description : You plan to measure your tape recorder’s SNR. What test equipment will you need?

Last Answer : A VTVM and a signal generator.

Two tape recorders have signal-to-noise ratios (SNRs) of 25-dB RMS and 35-dB RMS respectively. Which of the SNRs can record and reproduce the widest range of input signals and why?

Description : Two tape recorders have signal-to-noise ratios (SNRs) of 25-dB RMS and 35-dB RMS respectively. Which of the SNRs can record and reproduce the widest range of input signals and why?

Last Answer : 35-dB RMS because the highest SNR can always record and reproduce the widest range of input signals.

The head driver circuit of a tape recorder’s FM record electronics (figure 5-4) performs what function?

Description : The head driver circuit of a tape recorder’s FM record electronics (figure 5-4) performs what function?

Last Answer : It amplifies the frequency-modulated output from the record oscillator and sends it to the record head.

The equalization and phase correction circuit in a tape recorder’s direct reproduce electronics (figure 5-2) performs what function?

Description : The equalization and phase correction circuit in a tape recorder’s direct reproduce electronics (figure 5-2) performs what function?

Last Answer : It generates an equalization signal which corrects any frequency response problems in the input signal from the pre-amplifier circuit.

The head driver circuit in a tape recorder’s direct record electronics component (figure 5-1) performs what function?

Description : The head driver circuit in a tape recorder’s direct record electronics component (figure 5-1) performs what function?

Last Answer : It takes the signal from the summing network, amplifies it, and sends it to the record head for recording.

A recorder's erase head is always placed in what sequence on the record/reproduce track?

Description : A recorder's erase head is always placed in what sequence on the record/reproduce track?

Last Answer : . First, before the record and reproduce heads.

Which digital data encoding method helps overcome a tape recorder’s low-frequency response problems by recording two logic levels for each incoming data bit?

Description : Which digital data encoding method helps overcome a tape recorder’s low-frequency response problems by recording two logic levels for each incoming data bit?

Last Answer : Bi-phase level encoding.

The energy required to magnetize and demagnetize is called a) Saturation b) Retentivity c) Coercivity d) Hysteresis lossThe energy required to magnetize and demagnetize is called a) Saturation b) Retentivity c) Coercivity d) Hysteresis loss

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Last Answer : d) Hysteresis loss

Most record and reproduce heads are in one of what three bandwidth categories?

Description : Most record and reproduce heads are in one of what three bandwidth categories?

Last Answer : a. Narrowband—100 Hz to 100 kHz. b. Intermediate band—100 Hz to 500 kHz. c. Wideband—400 Hz to 2 mHz.

The head arm assembly of a floppy disk drive transport has how many read heads and how many write heads?

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Last Answer : Two read heads and two write heads.

What is the number of read-write heads in the drive for a 9- trac magnetic tape? A) 9 B) 16 C) 18 D) 27

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What is the number of read-write heads in the drive for a 9-trac magnetic tape? a. 9 b. 16 c. 18 d. 27

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