I have an 80s-vintage Harman Kardon turntable. It sits atop an
"entertainment center"-type piece of furniture, which is not very
stable
(it came from Ikea). This is on the upstairs floor of an old and
rather
rickety apartment building. The point is that the turntable is subject

to vibrations--if I walk near the turntable while it is playing, the
record may skip. Any simple, and inexpensive (under $50) measures I
can
take to minimize this problem? Thanks

Option 1:

Go to a place that sells old electric typewriters and pick up a
typewriter pad. Cost: maybe $10-15.00.

Option 2:

Get a small inner tube and a cinder block big enoug for the table.
Loosely inflate the tube so that it will just support the block and
place the block on the tube and the table on the block.
Cost: Maybe $30-40.00 depending on the cost of the tube.