On 2009-09-10, Jim Lesurf wrote:
In article , UnsteadyKen
wrote:
Don Pearce said...

Hold an LP up balanced on two fingers at opposite edges - you will see
how much it sags quite easily. Obviously it doesn't sag as much as
that with six suspension points, but it sags much more than enough to
generate a huge signal.

The Hydraulic was designed for the thick'n sturdy pre 73 oil crisis
discs which are a totally different animal to the later floppies.

My unreliable recollection is that many 'pre 73' LPs were far from flat, or
even very thick.


I obviously don't know what records you bought in that era but I bought
(and still own and play) roughly 500 or so records made pre 73. I've
just rechecked a ramdom sample (20 or so) and all without exception
are very flat and quite thick. Most are UK pop/rock but I also have a
fair few classical and some US rock imports. Even the very cheap classical
(eg Fontana and Marble Arch) are flat and are thick enough not to droop.


I got a couple of lp's last week, a Decca ffrr from 1965 and a bog
standard EMI Columbia from 1966 and neither droops on your finger tip
test,

Weird. Most of the pre 73 LPs I have are ones I bought when they first came
on sale! :-)


It would be interesting to know which labels made the "floppy" pre 73
LPs you have - if I have any of the same I'll dig them out and check
mine.

I do have a fair number of thin floppy LP's but these I'm fairly sure
date from the mid to late 70's.


Malcolm