[Hallicrafters] 100KC xtals

[Nash4447 at cs.com]

Fellas

Recently I asked the net whether anyone had experience with the little 100kc 
xtals sold nowadays in place of the larger extra long HC6U types from the 
1950s.
Several guys asked me to report back as to whether the little pencil erasure 
size xtals work in tube 100kc xtal calibrators. 

Well here is ther answer !   YES they do work in place of their larger older 
brothers. BUT I notice something a bit strange about them.

When put in a single tube xtal calibrator and when you turn the calibrator 
on, it takes about 5 seconds for the unit to begin oscillating. In other words, 
for some some strange reason, the little xtals don't begin oscillating 
immediately. If you remove the little xtal and install the older larger type, the 
calibrator comes on instantly when turned on. Why it works that way I dunno. 

So the long and short of it is, if you can wait 5 seconds for the calibrator 
signal, the little Mouser 66 cent 100KC crystals will work. 

73s Glenn K6PZT