[Vintage-Audio] Re Cartridges and Styluses

[Duane Fischer, W8DBF]

During the seventies, what was the typical tracking weight recommended for a
stylus used to play stereo records of that era?		
	
The same question, but for the sixties?	
	
What about the mono recordings of the middle fifties and then stereo into the
middle to late sixties? 
	
When did the vinyl industry go from the thicker recordings to the flimsey 33 1/3
records that flexed if you wanted to fan yourself with one? 	
	
When the vinyl record itself was changed, did the tracking weight change? If so,
to what? 	
	
What was the tracking weight recommended for playing the mono 45 rpm records?
What weight is now recommended for the reissues still available from oldies
specialty record stores? 	
	
The wisdom used to be to change the stylus every thousand hours of use, I think.
Does anybody know the truth of the issue? The goal is to minimize wear on the
grooves and to maximize the fidelity.	
	
Thanks to all for sharing your experience on these issues. 	
	
Duane Fischer, W8DBF