Sunday 5 December 2010

R2R Audio Tape - Agfa Professional PEM 369

This is what to expect if you use this type of Agfa reel to reel tape, as it has not aged well and is now one of the "bad" tapes to avoid.

Agfa PEM 369
Black backed   Long Play
Made in Germany
First produced in 1988
width 1/4 inch  6.33 mm  
reel 10.5in/ 3608 ft   26.5cm/1100m 

192 min per track at 3.75in/sec   9.5cm/sec
96 min per track at 7.5in/sec   19cm/sec 
48 min per track at 15in/sec   38cm/sec 
24 min per track at 30in/sec   76cm/sec 


cardboard box

black plastic spool with spindle centre




debris where the tape contacts the the tension arm

sample of debris



This was a new unused tape in its protective plastic bag. The tape had a black backing so I was suspicious it might be sticky. It is not advisable to play sticky tape as it would result in smearing on the heads, which could be difficult to remove. I ran an internet query and discovered that this type of Agfa tape could be "sticky". So I have published the results of my own test.

My test confirmed the tape was bad.

The tape looked and felt fine. I mounted it on the deck and then fast forwarded. The tape wound slower than normal and got progressively slower. There was also a strong synthetic smell. I held both tension arms away from the tape to release some of the tension and the tape speeded up. The tape was obviously causing drag. When the take up reel was full I repeated the operation. During all this tape transfer, just a very few slivers of the black backing material peeled off and dropped down to the floor. Some bits also lodged in the tape winding on the take up reel. This debris was not sticky, it felt dry and did not leave any stain if rubbed between thumb and forefinger.  Because the debris was not greasy, I did also try to record onto the tape very briefly near the start of the tape. Surprisingly, it did record but sounded distorted. After the test, I cleaned the heads and tape path with Isopropanol and there was only minor discolouration on the cotton bud.

 
This type of Agfa tape, although bad, is not nearly so awful as bad Ampex tapes which can make a terrible sticky mess on your heads and tape path.
Both the Agfa reel and box are quite attractive and useful so have been retained but the bad tape has been binned (and not sold on Ebay).

I have previously experienced other types of bad Agfa tape (eg PEM 268). However some types can still be very good (eg PEM 468).

Friday 3 December 2010

R2R Audio tape - Agfa Professional PEM 268

This is what to expect if you use this type of Agfa reel to reel tape, as it has not aged well and is now one of the "bad" tapes to avoid.

Agfa PEM 268
Made in Germany
First produced in 1973
1/4 inch black backed tape 
18cm/540m  7in/ 2100ft 
112 min per track at 3.75in/sec
56 min per track at 7.5in/sec


rigid plastic cassette
 

black backed tape
  


dark grey plastic 3 hole reel


track list insert
 


backing peels off as it runs against tape tension arm





debris collects on the floor

I recently ran an internet query to find out if this type of Agfa tape was "sticky" but could not find it included in any bad tape lists. So I have published the results of my own test.

My pre-owned used tape had a black backing so I was suspicious it might be sticky. It is not advisable to play sticky tape as it would result in smearing on the heads, which could be difficult to remove. My test confirmed the tape was bad.

The tape looked and felt fine. It was mounted on the deck and then fast forwarded. Slivers of the black backing material peeled off and dropped down to the floor. This debris was not sticky, it felt dry and did not leave any stain if rubbed between thumb and forefinger.  Because the debris was not greasy, I did also play the tape very briefly at the beginning, at the middle and at the end. Surprisingly, it did play well, so I guess a bad tape could be copied if the recorded content needed to be salvaged. However, it might be necessary to copy the recorded material in stages, cleaning the heads at each stage.

This type of Agfa tape, although bad, is not nearly so awful as bad Ampex tapes which can make a terrible sticky mess on your heads and tape path.
Both the Agfa reel and cassette are quite attractive and useful so have been retained but the bad tape has been binned (and not sold on Ebay).

I have previously experienced other types of bad Agfa tape (eg PEM 369 even when new and PEM 368). However some types can still be very good (eg PEM 468).