by Record-changer »
Tue Dec 01, 2015 6:02 am
Do NOT use an acoustic player with World War II records (1939-1947). Also do not use most record changers.
Records made during World War II were made of substitute materials. Shellac was rationed during World War II because it was needed for motor and generator winding insulation for war vehicles and airplanes, and because Japan had captured the major sources of shellac.
The following make World War II records different from other records:
1. To buy a new record, you had to turn in a used record.
2. The used records were ground up to get shellac to make new records.
3. Filler materials were added to the shellac to exte3nd the supply of shellac.
4. Often the record had a layer of shellac on each side, sandwiched around a substrate of some other material. In some cases, glass was used.
5. Some 78s (including the colored ones) are made of polystyrene, not shellac.
The following effects are observed with these substandard records:
1. The records are usually very brittle and break a lot easier than prewar records.
2. The grooves wear more rapidly than those of a record made with good shellac.
3. The heavy tracking of an acoustic player has occasionally cut or broken through the shellac layer to the substrate.
4. Polystyrene records need a very low tracking force to not be worn. An acoustic player will destroy a polystyrene record.
5. It is rare, but dropping the record from the spindle has broken it. The only changers I would trust with World War II records are the Webcor and Philco changers with the s-shaped sloped spindles. I would not drop a 12" shellac record at all.
You need a 78 pickup that tracks as light as is possible.
Do not use steel needles.