[MrFixr55]

I hear you Ron.  It appears that the diode detector did not become popular until about 1934 or so when the '55 / '75 / 85/ 6Q7 double diode / triode detector, 1st AF Amp tubes became popular.  There is a big difference in sound quality between my Radiola 17, 18, and others with a grid leak detector, my Radiola 60, my RCA R7A and R28 with a "Biased Detector" and my more modern radios from 1934 (Crosley 5C2) and on.  Zenith 6S52 chassis, RCA 6T7 and so on and so on with the diode detector and triode AF Amp.

One of my retirement "experiments" will be to create a "plug in" replacement for the biased detector, replacing it with a diode / triode detector / AF Amp.  I will try it first on my R7A (2 '47s in push pull)