Analog Tape Machine Alignment (2)

Preparing the tape machine: 'Demagnetizing' and 'Cleaning'

The Music Telegraph | Text 2019/12/02 [14:27]

Analog Tape Machine Alignment (2)

Preparing the tape machine: 'Demagnetizing' and 'Cleaning'

The Music Telegraph| 입력 : 2019/12/02 [14:27]

 

▲ Cleaning the heads of an Analog Tape Recorder

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Analog Tape Machine Alignment (2)

 

(Continued from previous article)

 

Preparing the tape machine: 'Demagnetizing' and 'Cleaning'

The first thing you must do when using an alignment tape is to make sure the tape machine is free of any magnetism that might have accumulated on the heads (and other metallic parts) from previous operation, and to make sure the tape path is free of grease and dirt. You can get rid of magnetism by using a large electromagnet to randomize the magnetic domains that may be on the metallic parts. The dirt and grease are cleaned off the machine by applying an alcohol solvent to the tape path.

 

 

1) Make sure the power is turned off.

This is very important. The demagnetizer's magnetic fields are hundreds of times more powerful than the magnetic fields the electonics are designed to handle. The initial circuits will most definitely be damaged if you apply a demagnetizer to the heads while the electonics are on. So if the power is on, turn off the tape machine power now!! You will find the power switch on the lower right hand corner of the tape transport.

 

 

2) Demagnetize the heads of the tape machine (and any other parts that have magnetic properties and come into contact with tape).

Once more, be sure that the tape machine if off before demagnetizing and that all tapes are located a safe distance away from the demagnetizer.

 

To do this, plug the demagnetizer into an AC outlet. Slowly move the tip of the unit toward the part to be demagnetized in a spiral motion. Care should be taken to not damage the heads by   making physical contact with the head. After 10-15 seconds of slowly rotating the demagnetizer in front of each head, slowly begin to move the unit away from the part in a spiral fashion as before. Go on to the next metal part (head) in this fashion until all parts that come in contact with the tape are demagnetized. 

 

 

3) Clean the heads and all other parts of the machine that come into contact with tape.

Use the 90 - 99% isopropyl alcohol in the tape caddie to clean the parts. To do this, wet a cotton swab with alcohol and clean the parts of the tape path. When cleaning the heads, be careful to use a horizontal motion. When a swab is dirty, throw it away. Do not re-wet the swab.

 

 

*Note: Using 'Special Rubber and Head Cleaners'

There are special rubber cleaners that you can use to clean the pinch roller and/or any other rubber idlers in the tape path. Some of them claim to help restore the elasticity of the rubber. If rubber cleaner is not available, 90 - 99% isopropyl alcohol may be used as the universal solvent. There are special head cleaners (made of xylene solutions) that are better solvents than alcohol. They do a better job of dissolving the oxide and adhesive binder residues that can get lodged in the guides and head stack. Head cleaners like these are good, but dangerous. They will destroy rubber and dissolve plastics! Be safe and use alcohol for all the parts.

 

 

 

 

 

 

 

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