[ARC5] [Glowbugs] "Using Defective Crystals" 1937

[Roy Morgan]

Hue,

This is an interesting article.  I have had one of the round crystal holders shown, but never took it apart.

The business about 

“If it (the crystal) has been cracked … possible to get several good crystals from an inch square plate … all of which will oscillate on the original frequency.”  

is pure baloney, based on all I have learned about quartz crystals and how they operate.

It is possible of course - I never tried it.  I suspect they never tried it either!

Roy


> On Jun 21, 2020, at 8:07 PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> Crystals seem to be a popular topic among radio communication hobbyists.
> Herewith an item from ' Short Wave and Television ' magazine, Dec. 1937.
> I have to admit, I do not understand how the added coil would work to increase
> feedback gain. It does not appear to be coupled in any way to an output inductor.
> ( There are a number of crazy, fascinating, and instructive kinks hiding in the old
> magazines. ) 
> -Hue Miller
> .

Roy Morgan
K1LKY since 1958
k1lky68 at gmail.com