[Vintage-Audio] Re IHF Rating System

[Duane Fischer, W8DBF]

Hi All, 	
	
Once upon a time, there was a power rating system known as the Institute of High
Fidelity, or IHF. This was at a time when manufacturers tried to suck in the
public with 'peak' power ratings. "Handles 200 watts!" Yea, but for 250
milliseconds before the amplifier exploded! Shortly thereafter the IHF rating
appeard, I think? Then we went to the continuous RMS scale, which was more
accurate, or so they made us think anyhow. 	
	
Does anyone recall what the IHF rating was actually based upon?	
	
Thanks. 		
	
Duane W8DBF