In the fifties, video and audio recorders were approaching the size of refrigerators. Such a retrospective illustrates well the trends in the development of equipment. Recording formats are getting smaller and smaller. Recording density - higher and higher. Recording wavelength - shorter and shorter.

High performance in small formats is a good thing. But there is one downside. As the recording wavelength decreases, the potential signal loss caused by micro-debris increases.

The signal loss (in dB) is equal to (54,6(d))/l, where d is the distance between the tape and the head, and l is the recording wavelength. Imagine a particle of, say, dust, 0,1 mm in size - only 1/1000 of the diameter of a human hair. In the Betacam SPv tape recorder, the minimum wavelength (l) is 0,9 mm. Thus, the signal loss will be (54,6(0,1))/0,9 = 6,1 dB. That is, even the smallest debris particles can lead to significant signal losses.

Enemy need to know in person

Accumulation of contaminants can degrade the signal-to-noise ratio, cause signal dropouts, poor picture and sound quality, and make playback impossible. But not all types of pollution are the same. Different types require different cleaning methods:

Head contamination

Usually these are debris microparticles that appear as a result of various collisions and pressure between the parts of the LPM and the tape. This is a magnetic material, lubricants, binders and even the basis of the tape. Proper cleaning with the Sony CLQ-30K Cleaning Kit removes such contaminants and restores the high performance of the equipment.

Material stuck to the heads

High temperature and pressure can “melt” debris onto the head. Moreover, “glazing” (covering with a plastic film) may occur when the polyester particles begin to adhere. Normal wet cleaning with chamois leather and alcohol will not be sufficient to remove such adhering material. And the material remaining after such cleaning will “scrape” additional debris from the tape. Equipment problems caused by “glazing” are similar to die wear. It's easy to make a mistake - and pay big bucks for unnecessary head replacements. Proper cleaning with an appropriate cleaning cassette will usually remove the “glaze”.

Scratches on the head

Usually left by dust particles from the environment, especially when using a camcorder. Sometimes you have no choice but to shoot in dusty, dirty or smoky environments. Mineral particles such as aluminum and quartz can easily get caught between the tape and heads, leaving surface scratches on the latter. Cleaning with an appropriate cleaning cassette will often help to get rid of such scratches, restoring the quality of the equipment.

Scratches on the tape

Dirt buildup on the transport mechanism, tape guides, rotary head assembly, and stationary heads can cause damage to the tape. The resulting microscopic scratches and dents on the tape degrade the picture and sound quality. Cleaning solvents usually remove this debris, preventing damage to the tape.

Shaft contamination...

Dirty guides...

Head block contamination...

...may cause scratches on the tape

Two types of cleaning

To keep your equipment in good condition, you need to clean it regularly using two different approaches. A cleaning cassette of the appropriate size is effective for the rotary head unit. The next step is wet cleaning with the Sony CLQ-30K kit. It includes a liquid cleaner and a special wipe and works better than other methods on stationary heads, rails, shafts and pinch rollers. Each method has its own specific strengths.

Farther

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